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Mazda · Known Issues

2003 Mazda MPV Problems: 10 Known Issues

2003 model year · 480+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 480+ owner reports, the 2003 Mazda MPV has 10 documented known issues, with 5 rated critical. The most serious are Automatic Transmission Shudder and Failure ($300-$3,000 repair), Automatic Transmission Slipping and Harsh Shifting ($200-$3,500 repair), Front Fog Lamp Socket Separates Inside the Bumper and Can Start a Fire (Recalls 03V053, 03V206) ($0-$0 repair), Rear Heater Coolant Pipes Rust Through and Dump Coolant (Underbody Steel Lines) ($500-$1,200 repair) and Cooling Fan Control Module Fails, Fans Run Constantly or Not at All (Overheating) ($250-$600 repair). The most commonly reported issue is Automatic Transmission Shudder and Failure with 180 owner reports. Across all issues with published estimates, repair costs range from $200 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • MPV Transmission2
  • MPV Cooling2
  • MPV Exterior1
  • MPV Body/Panels1
  • MPV Electrical1
  • MPV Emissions1
  • MPV Suspension1
  • MPV Engine1
  • Recalls8
  • FAQ
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In This Article

  • Transmission2
  • Cooling2
  • Exterior1
  • Body/Panels1
  • Electrical1
  • Emissions1
  • Suspension1
  • Engine1
  • Recalls8
  • FAQ

All 10 Known Issues

NHTSA Recalls8 recalls

EQUIPMENT:OTHER:LABELS

THE TIRE INFLATION PRESSURE INDICATED ON THE VEHICLE CERTIFICATION LABEL IS NOT CORRECT. THE LABELS SHOW THE MAXIMUM TIRE PRESSURE AS 240 KPA/32 PSI WHEN IT SHOULD BE SHOWN AS 240 KPA/35 PSI. AS A RESULT OF THIS ERROR, THE LOAD RATIOS FOR THE 205/65R15 94H AND THE 215/60R16 95H TIRES EXCEED THE LEVELS PERMITTED BY FMVSS 120.

Campaign #04V28200010/06/2004

AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Mazda North America Operations (Mazda) is recalling certain 2005-2006 Mazda MPV vehicles sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming. On July 9, 2019 this recall was expanded to include certain 2005-2009 RX-8 vehicles that were previously recalled under 17V-011 but have not yet been repaired. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.

Campaign #18V40400015/06/2018
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Frequently Asked Questions

What are the most common Mazda MPV problems?

According to Au7o's analysis of 480+ owner reports, the 2003 Mazda MPV has 10 documented issues. The most frequently reported are: Automatic Transmission Shudder and Failure, Automatic Transmission Slipping and Harsh Shifting, Front Fog Lamp Socket Separates Inside the Bumper and Can Start a Fire (Recalls 03V053, 03V206). Of these, 5 are rated critical and should be addressed promptly.

Is the Mazda MPV reliable?

The 2003 Mazda MPV has 10 known issues documented across 480+ owner reports. 5 issues are rated critical: Automatic Transmission Shudder and Failure and Automatic Transmission Slipping and Harsh Shifting and Front Fog Lamp Socket Separates Inside the Bumper and Can Start a Fire (Recalls 03V053, 03V206) and Rear Heater Coolant Pipes Rust Through and Dump Coolant (Underbody Steel Lines) and Cooling Fan Control Module Fails, Fans Run Constantly or Not at All (Overheating). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mazda MPV problems?

Repair costs for known Mazda MPV issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Automatic Transmission Shudder and Failure, typically costs $300-$3,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2000-2007 Mazda MPV Automatic Transmission Shudder and Failure?

Automatic transmission develops torque converter shudder and eventual internal failure. Shifts become harsh and delayed. Common on 2000+ models with the 5-speed auto. Repairs typically run $300-$3,000. Severity: high.

What is the 2000-2006 Mazda MPV Automatic Transmission Slipping and Harsh Shifting?

The second-generation MPV's 5-speed automatic transmission (shared with Ford) develops slipping, harsh shifts, and delayed engagement between 80,000-120,000 miles. The torque converter lock-up clutch wears, and the valve body solenoids stick. The transmission fluid often shows si… Repairs typically run $200-$3,500. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 480+ owner reports, NHTSA recalls, TSBs, and automotive forums.

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ALL YEARS2007200620052004200320022001200019991998199719961995199419931992199119901989
Community reported
180 owners

On the 2000-2007 Mazda MPV, automatic transmission develops torque converter shudder and eventual internal failure. Shifts become harsh and delayed. Common on 2000+ models with the 5-speed auto.

Common Symptoms

  • Shudder at 40-50 mph
  • Harsh shifting
  • Delayed engagement
  • Slipping on hills
  • Transmission temperature warning

How to Fix

Flush transmission fluid with Mazda-specified fluid. If shudder persists, torque converter or rebuild needed.

Owner tips & cautions

  • TipUse only Mazda M-V ATF or equivalent — wrong fluid causes the shudder
Typical repair cost:$300 - $3,000

Research This Issue

Based on 180 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Low Confidence180 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2000-2006 Mazda MPV, the second-generation MPV's 5-speed automatic transmission (shared with Ford) develops slipping, harsh shifts, and delayed engagement between 80,000-120,000 miles. The torque converter lock-up clutch wears, and the valve body solenoids stick. The transmission fluid often shows signs of degradation (dark color, burnt smell) well before problems are felt. Towing or heavy passenger loads accelerate wear.

Common Symptoms

  • Transmission slips during 2-3 shift
  • Harsh downshifts
  • Delayed engagement from Park to Drive
  • Shudder at highway speeds (torque converter)
  • Check engine light with trans codes

How to Fix

Change transmission fluid and filter every 30,000 miles with Mercon V ATF. A fluid change can temporarily improve mild slipping. If the torque converter shudder is present, a Mercon LV fluid change may help. Failed transmissions require rebuild ($1,800-$3,000) or replacement with a remanufactured unit ($2,000-$3,500). Jasper and Certified Transmission offer remanufactured units with warranties.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Valvoline DEX/MERC automatic transmission fluid
    OEMValvoline VV349 / current size-specific DEX-MERC SKU

    M-III/Dexron III-equivalent fluid for a diagnosed service or refill branch Fitment/availability: The inspected manufacturer store page states that Valvoline DEX/MERC is suitable for Dexron III and older Mercon applications and offers one…

    Valvoline

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • TipChange the trans fluid every 30k miles — don't listen to the "lifetime fluid" myth. Drain-and-fill only (NOT a full flush) with Mercon V. The MPV trans is Ford-sourced and needs regular fluid changes to survive.
Typical repair cost:$200 - $3,500

Research This Issue

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Community Reported
Medium Confidence

On the 2000-2006 Mazda MPV, second-generation MPVs route long steel coolant pipes down the underside of the body to feed the rear heater core. The rear wheel arch liner does not shield them, so tire spray blasts salt and grit directly onto the pipes. In salt-belt vehicles the steel corrodes from the outside in and eventually perforates, dumping coolant under the van - often with no visible leak in the engine bay, which sends owners looking for a head gasket. Owners on the MPV forums documented this as a design problem; Mazda changed the pipe material and added a urethane protector in later production, and issued a service bulletin with a warranty extension for corrosion of the rear heater pipe. A front coolant pipe was covered by an earlier corrosion campaign but the rear pipes were not included in it, which is the most common source of confusion.

Common Symptoms

  • Coolant puddle under the middle of the vehicle
  • Coolant level drops with no visible engine-bay leak
  • No heat from the rear HVAC unit
  • Sweet coolant smell after driving
  • Overheating after prolonged coolant loss
  • Rust scaling visible on the pipes along the underbody

How to Fix

Inspect the underbody heater pipes for scaling and weeping before they fail. The correct repair is to replace both rear heater pipes with the later revised (aluminum / protected) parts rather than splicing rubber hose into a corroded steel run. Add or repair the wheel-arch liner and undercoat the new pipes. Some owners with a documented no-heat/coolant-loss complaint were covered under Mazda's warranty extension for rear heater pipe corrosion - worth asking a dealer by VIN, though the extension has long expired on most vehicles. Bypassing the rear heater is a common but comfort-reducing shortcut.

Typical repair cost:$500 - $1,200

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2002-2006 Mazda MPV 3.0L AJ-DE V6, the solid-state cooling fan control module mounted in the engine bay of second-generation MPVs is a well-known failure point. When it fails, the radiator/condenser fans either run continuously the moment the key is turned (engine never reaches operating temperature, poor fuel economy, drained battery) or stop working entirely, which lets the engine overheat in traffic even though the coolant, water pump and thermostat are fine. Because the failure mode is intermittent at first, many owners chase thermostats and water pumps before finding the module. Mazda issued a special service program covering 2002-2003 vehicles with an updated module; owners report dealers occasionally reinstalled the original-spec part number rather than the superseded one, so the failure returned.

Common Symptoms

  • Engine overheats in stop-and-go traffic but runs cool on the highway
  • Cooling fans run at full speed continuously from key-on
  • Cooling fans never come on at all
  • Engine takes a very long time to warm up / heater blows cool
  • A/C blows warm at idle but cold while driving
  • Temperature gauge climbs then drops when moving

How to Fix

Confirm fan response to A/C request and commanded coolant-temperature operation before replacement. If the control module is the failed branch, use the current revised part and pressure-test the engine if it was overheated.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Mazda cooling-fan control module L510-15-15Y
    $110

    Mazda catalog fitment covers the 2002-2006 MPV ES, LX and LX-SV 3.0L and identifies L510-15-15Y as the revision replacing AJ51-15-15YA; confirm the module rather than motor or harness is the failed branch.

    eBay

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$250 - $600

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2001-2003 Mazda MPV, on MPVs equipped with factory front fog lamps, the bulb socket holder is pressed into the lamp housing. Heat from the bulb expands the socket holder and pushes it rearward; after repeated heat cycles combined with road vibration, the socket holder, bulb and wiring harness can separate from the lamp housing and drop loose inside the front bumper. A live, hot bulb sitting against bumper plastic is a fire risk. NHTSA campaign 03V053 covered improperly installed fog lamp bulb sockets, and a second campaign, 03V206 (Mazda campaign 1103F), covered the socket holder separating from the lamp case. The campaigns spanned MPV as well as other Mazda models built in the same window.

Common Symptoms

  • Fog lamp stops working intermittently
  • Rattle or loose object heard inside the front bumper
  • Melted or scorched plastic inside the bumper cover
  • Fog lamp bulb hanging loose behind the lens
  • Burning plastic smell after running fog lamps

How to Fix

Free recall remedy. Under 03V053 dealers inspect the fog light bulb assembly installation and repair it where necessary; under 03V206 dealers install a retaining spring that prevents the socket holder from backing out of the lamp case. Check the VIN against the NHTSA recall lookup or Mazda's owner recall page - these are old campaigns but remain open indefinitely and free on unrepaired vehicles. If the fog lamps have been replaced with aftermarket units the remedy no longer applies; inspect that the socket is retained.

Typical repair cost:$0 - $0

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026
Community reported
160 owners

On the 2000-2007 Mazda MPV, power sliding door motor, cable, or latch mechanism fails. Door may not open, not close completely, or reverse direction randomly.

Common Symptoms

  • Door reverses while closing
  • Door will not open with power button
  • Grinding noise during door operation
  • Door stops halfway
  • Warning chime with door issue

How to Fix

Diagnose specific component — motor, cable, or latch. Cable replacement is most common. Lubricate track and rollers regularly.

Owner tips & cautions

  • TipClean and lubricate the door track and rollers with white lithium grease every 6 months to prevent cable strain
Typical repair cost:$200 - $700

Research This Issue

Based on 160 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Low Confidence160 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026
Community reported
140 owners

On the 1990-2006 Mazda MPV, alternator fails prematurely due to heat exposure from exhaust proximity. Battery drains and warning lights come on. Can strand vehicle if battery goes flat.

Common Symptoms

  • Battery light on dashboard
  • Dim headlights
  • Battery dies overnight
  • Electrical accessories intermittent
  • Whining noise from alternator

How to Fix

Replace alternator. Install heat shield if available. Check serpentine belt and tensioner at same time.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Motor City Reman 13883N new 100-amp alternator
    OEMMotor City Reman 13883N

    Stock-output replacement after charging-system testing confirms alternator failure Fitment/availability: The inspected direct page lists a new 100-amp alternator for U.S.

    Motor City Reman
  • Motor City Reman 11006N new 110-amp alternator
    OEMMotor City Reman 11006N

    Stock-output replacement after charging-system testing confirms alternator failure Fitment/availability: The inspected direct page lists a new 110-amp alternator for U.S.

    Motor City Reman

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • TipReplace serpentine belt and tensioner when replacing alternator — they are all at end of life at the same time
Typical repair cost:$250 - $600

Research This Issue

Based on 140 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Low Confidence140 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2000-2006 Mazda MPV, second-generation MPVs carry three catalytic converters: a main converter plus two close-coupled 'pre-cats' bolted right at the exhaust manifolds, one on the radiator side and one on the firewall side. Sitting that close to the ports, the pre-cat substrates run extremely hot and break down. The immediate symptom is a catalyst efficiency code - P0420 on earlier vehicles, P0421 (warm-up catalyst, bank 1) on Mazda's later coding - but the real hazard is that a disintegrating pre-cat can shed ceramic substrate which, on an engine that has any intake pulsation or a leaking exhaust valve, can be drawn back toward the cylinder and score the bore. The failure is almost always downstream of something else: a persistent misfire, a leaking injector, or an oil-consumption problem cooking the catalyst. Owners commonly replace the rear O2 sensor first and get the code back within a drive cycle.

Common Symptoms

  • Check engine light with catalyst efficiency code
  • Rotten-egg / sulfur smell from the exhaust
  • Reduced power and poor fuel economy
  • Rattle from the exhaust near the engine
  • Failed emissions test

How to Fix

Do not replace the converter until the cause is found. Check for misfires and pending misfire counters, verify fuel trims, confirm the upstream air/fuel ratio sensor and downstream O2 sensor are switching correctly, and fix any oil consumption or coolant loss into a cylinder first - all of these destroy a replacement converter within months. Confirm the code by comparing the pre- and post-catalyst sensor traces rather than by code alone. When the converter genuinely is the fault, replace the failed pre-cat with a properly rated unit; a cheap universal converter will re-set the code. Budget for the fact that the pre-cats are hard to access on a transverse V6.

Typical repair cost:$500 - $1,800

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

On the 2000-2006 Mazda MPV, the MPV's rear coil springs corrode and fracture in rust-belt states, typically breaking at the bottom coil. A broken spring causes the rear of the vehicle to sag on one side and can puncture a tire if the broken end shifts. The springs lose their protective coating from road salt and moisture, and the tightly wound lower coils trap debris that accelerates corrosion.

Common Symptoms

  • Vehicle leans to one side in rear
  • Clunking noise from rear suspension
  • Visible broken coil spring end
  • Rear ride height lower than normal
  • Tire damage from broken spring end

How to Fix

Replace both rear coil springs as a pair ($100-$200 for a pair of aftermarket springs). Never replace just one side. MOOG and Monroe are reliable aftermarket options. Inspect the spring perches and shock absorbers during replacement. Spray new springs with rubberized undercoating after installation. An annual undercoating application helps prevent recurrence in rust-belt climates.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Mazda LC70-28-011A rear coil spring
    OEMMazda LC70-28-011A

    Matched-pair rear-spring replacement for the 2000-2001 2.5L branch Fitment/availability: The inspected direct OEM page lists LC70-28-011A as a rear coil spring for 2000-2001 Mazda MPV DX/ES/LX with the 2.5L V6, showed $164.26 each, ships…

    MazdaPartsNow

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • WarningCheck your rear springs every spring (pun intended) — look for rust and cracks on the lower coils. A broken spring can puncture your tire on the highway. MOOG replacements are $50 each and a 1-hour job per side.
Typical repair cost:$200 - $500

Research This Issue

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Community Reported
Medium Confidence

On the 2002-2006 Mazda MPV 3.0L AJ-DE V6, the 3.0L AJ-DE V6 used in 2002-2006 MPVs (Mazda's version of the Ford Duratec 30) develops chronic external oil leaks as the RTV and gaskets age. The two dominant sources are the timing chain cover, where the sealant between the cover, block and heads gives up, and the valve covers, including the rubber grommets around the valve cover bolts, which split and weep. A third, less obvious source is the seal behind the water pump pulley area at the rear of the cam drive. The timing chain cover job is disproportionately expensive on this engine because the intake manifold, both valve covers, the passenger-side engine mount, the alternator and the power steering pump must all come off to extract the cover in the tight transverse bay. Left alone, oil drips onto the accessory belt and exhaust and produces the burning smell owners report.

Common Symptoms

  • Burning oil smell after driving
  • Oil drips on the driveway from the front of the engine
  • Oil pooling in the spark plug wells
  • Oil-soaked accessory drive belt
  • Low oil level between changes with no blue smoke

How to Fix

Identify the actual source with a UV dye test before quoting - valve cover gaskets and their bolt grommets are cheap and fix a large fraction of these leaks, and are worth doing first. If the leak is truly the timing chain cover, the correct repair is to clean the mating surfaces completely and reseal with the specified anaerobic/RTV sealant; do not attempt to seal it from outside. Replace the front crank seal and cam seals while the cover is off, and inspect the timing chain guides at the same time since access is already paid for. Replace the PCV hose from the valley separator at the same service, as a collapsed or leaking PCV hose raises crankcase pressure and pushes oil past the gaskets again.

Typical repair cost:$200 - $1,400

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Mazda North America Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2006-2007 Mazdaspeed6 and 2004 MPV vehicles nationwide. Mazda is also recalling 2005-2006 MPV vehicles in Alabama, Arizona, Arkansas, California, Delaware, the District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands. On July 9, 2019 this recall was expanded to include certain 2004-2011 RX-8 vehicles that were previously recalled under 16V-354 but have not yet been repaired. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these passenger air bag inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.

Campaign #18V40200015/06/2018

AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Mazda North American Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2004-2005 MPV, 2004 RX-8, and 2006-2007 Mazdaspeed6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.

Campaign #19V78100031/10/2019

AIR BAGS:FRONTAL

AS A RESULT OF AN NCAP TEST, CERTAIN MINIVANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, "OCCUPANT CRASH PROTECTION." THE FRONT PASSENGER SEAT AIR BAG WAS NOT CORRECTLY WIRING.

Campaign #04V07300017/02/2004

+ 3 more recalls. Check all on NHTSA.gov

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

get a full repair guide

What is the 2001-2003 Mazda MPV Front Fog Lamp Socket Separates Inside the Bumper and Can Start a Fire (Recalls 03V053, 03V206)?

On MPVs equipped with factory front fog lamps, the bulb socket holder is pressed into the lamp housing. Heat from the bulb expands the socket holder and pushes it rearward; after repeated heat cycles combined with road vibration, the socket holder, bulb and wiring harness can sep… Repairs typically run $0-$0. Severity: high.

What is the 2000-2006 Mazda MPV Rear Heater Coolant Pipes Rust Through and Dump Coolant (Underbody Steel Lines)?

Second-generation MPVs route long steel coolant pipes down the underside of the body to feed the rear heater core. The rear wheel arch liner does not shield them, so tire spray blasts salt and grit directly onto the pipes. In salt-belt vehicles the steel corrodes from the outside… Repairs typically run $500-$1,200. Severity: high.

What is the 2002-2006 Mazda MPV Cooling Fan Control Module Fails, Fans Run Constantly or Not at All (Overheating)?

The solid-state cooling fan control module mounted in the engine bay of second-generation MPVs is a well-known failure point. When it fails, the radiator/condenser fans either run continuously the moment the key is turned (engine never reaches operating temperature, poor fuel eco… Repairs typically run $250-$600. Severity: high.

What is the 2000-2007 Mazda MPV Power Sliding Door Malfunction?

Power sliding door motor, cable, or latch mechanism fails. Door may not open, not close completely, or reverse direction randomly. Repairs typically run $200-$700. Severity: medium.

What is the 1990-2006 Mazda MPV Alternator Premature Failure?

Alternator fails prematurely due to heat exposure from exhaust proximity. Battery drains and warning lights come on. Can strand vehicle if battery goes flat. Repairs typically run $250-$600. Severity: medium.

What is the 2000-2006 Mazda MPV Pre-Catalyst Failure Sets P0420/P0421 and Can Ingest Substrate Into the Engine?

Second-generation MPVs carry three catalytic converters: a main converter plus two close-coupled 'pre-cats' bolted right at the exhaust manifolds, one on the radiator side and one on the firewall side. Sitting that close to the ports, the pre-cat substrates run extremely hot and… Repairs typically run $500-$1,800. Severity: medium.

What is the 2000-2006 Mazda MPV Rear Coil Spring Corrosion and Fracture?

The MPV's rear coil springs corrode and fracture in rust-belt states, typically breaking at the bottom coil. A broken spring causes the rear of the vehicle to sag on one side and can puncture a tire if the broken end shifts. The springs lose their protective coating from road sal… Repairs typically run $200-$500. Severity: medium.

What is the 2002-2006 Mazda MPV Timing Chain Cover and Valve Cover Gasket Oil Leaks on the 3.0L AJ-DE V6?

The 3.0L AJ-DE V6 used in 2002-2006 MPVs (Mazda's version of the Ford Duratec 30) develops chronic external oil leaks as the RTV and gaskets age. The two dominant sources are the timing chain cover, where the sealant between the cover, block and heads gives up, and the valve cove… Repairs typically run $200-$1,400. Severity: medium.