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Ford · Known Issues

2008 Ford Mustang Problems: 6 Known Issues

2008 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2008 Ford Mustang has 6 documented known issues, with 3 rated critical. The most serious are S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag ($700-$1,800 repair), Takata Driver Airbag Inflator Rupture Risk ($0-$0 repair) and Fuel Tank Cracking and Fuel Vapor/Fuel Leak at Tank Seam or EVAP Area ($900-$1,800 repair). Across all issues with published estimates, repair costs range from $250 to $1,800. DIY maintenance guides at au7o.io.

In This Article

  • Mustang Safety/Recalls2
  • Mustang Fuel System1
  • Mustang Cooling1
  • Mustang Suspension1
  • Mustang Electrical1
  • Recalls9
  • FAQ
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In This Article

  • Safety/Recalls2
  • Fuel System1
  • Cooling1
  • Suspension1
  • Electrical1

All 6 Known Issues

Filter:
ALL YEARS20252023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999199819971996199519941993199219911990197319721971197019691968196719661965

When Issues Typically Appear

Takata Driver Airbag Inflator Rupture Risk
0K-200K
2005-2010 Smart Junction Box Water Intrusion Causing Wiper, Lighting, and Electrical Malfunctions
30K-150K
S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag
40K-120K
Fuel Tank Cracking and Fuel Vapor/Fuel Leak at Tank Seam or EVAP Area
40K-120K
Front Strut Mount and Sway Bar End Link Clunking on S197 Suspension
50K-120K
4.0L Cologne V6 Thermostat Housing Cracking and Coolant Leaks
60K-140K
050K100K150K200K mi

On the 2005-2010 Ford Mustang, on 2005-2010 Mustangs, the passenger seat occupant classification system (OCS) can fail or become inaccurate, illuminating the airbag warning lamp and causing the passenger airbag to be disabled. Ford issued Customer Satisfaction Program 15B24 for certain vehicles because the OCS may not properly detect an adult occupant. Owners commonly report an airbag light, 'pass airbag off' staying on with an adult seated, and failed state inspections.

This issue also affects: Ford F-150

Common Symptoms

  • Airbag warning light illuminated
  • Passenger airbag off indicator stays on with adult passenger
  • SRS fault messages
  • Failed safety inspection due to airbag light

How to Fix

Scan the restraints control module for OCS-related faults and verify passenger seat weight sensor operation with IDS or equivalent capable scan tool. Repair typically involves replacing the passenger seat cushion/OCS mat or related seat sensor components, then performing the required OCS calibration procedure. Wiring under the seat should also be inspected for connector damage or high resistance before replacing parts.

Typical repair cost:$700 - $1,800

Research This Issue

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Community Reported
High Confidence

On the 2005-2014 Ford Mustang, many 2005-2014 Mustangs were included in the Takata airbag inflator recalls. The driver airbag inflator can degrade over time, especially in hot and humid climates, and may rupture during deployment, sending metal fragments into the cabin. This is a major safety defect documented by federal recalls and owner notifications.

This issue also affects: Ford Ranger

Common Symptoms

  • no warning symptoms before failure
  • open airbag recall notice
  • SRS concern only if related components are disturbed during service

How to Fix

Check VIN status through Ford or NHTSA and have the inflator replaced immediately if open recall status exists. There is no maintenance workaround; the only proper fix is recall completion using the updated inflator module. Owners buying used Mustangs should verify recall completion before purchase.

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Typical repair cost:$0 - $0

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Community Reported
High Confidence

On the 2005-2010 Ford Mustang, s197 Mustangs from the mid-2000s have a documented pattern of fuel tank cracking or leaking, often near the seam or around the evaporative emissions components. Owners report strong fuel odor in garages, visible dripping after fill-ups, and EVAP-related warning lights. Because the issue involves fuel leakage near the rear of the vehicle, it presents a fire risk and can require full tank replacement.

This issue also affects: Ford Ranger, Ford Transit Connect, Ford Escape

Common Symptoms

  • strong gasoline smell near rear of car
  • fuel dripping or wetness around tank area
  • check engine light
  • fuel smell after refueling
  • failed emissions or EVAP test

How to Fix

Inspect the tank shell, seams, filler neck area, and EVAP connections with the tank partially filled and under smoke test if needed. Replace the fuel tank if cracked; also inspect/replace damaged seals, vent valves, and straps as needed. Clear EVAP codes and verify no leaks remain after repair.

Typical repair cost:$900 - $1,800

Research This Issue

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Community Reported
High Confidence

On the 2005-2010 Ford Mustang 4.0L SOHC V6, the 4.0L SOHC V6 used in 2005-2010 Mustangs commonly develops coolant leaks from the composite thermostat housing and related seals. The plastic housing can warp or crack with age and heat cycling, causing external coolant seepage and sometimes overheating if the leak worsens. This is a well-known issue across Ford applications using the same 4.0L engine and is frequently documented in owner forums and repair databases.

This issue also affects: Ford Aerostar, Ford Bronco Sport, Ford Crown Victoria

Common Symptoms

  • Coolant smell from engine bay
  • Visible coolant leak near thermostat housing
  • Low coolant warning or reservoir level dropping
  • Engine running hot or overheating
  • White residue around housing seams

How to Fix

Pressure-test the cooling system and inspect the thermostat housing assembly, crossover area, and sensor ports for seepage or crusted coolant residue. Replace the thermostat housing assembly with updated parts, install new seals, and refill/bleed the cooling system properly. If overheating occurred, verify there is no secondary damage such as a stuck thermostat or compromised temperature sensor.

Typical repair cost:$250 - $700

Research This Issue

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Community Reported
High Confidence

On the 2005-2014 Ford Mustang, a common S197 complaint is front-end clunking or popping over bumps, driveways, and low-speed turns caused by worn upper strut mounts, strut bearings, or sway bar end links. The issue is widely discussed in owner forums and often appears as mileage accumulates or after lowering springs are installed. Owners describe a loose-feeling front suspension and knocking noises that can be difficult to isolate without chassis-ear or pry-bar inspection.

This issue also affects: Ford Escort

Common Symptoms

  • front clunk over bumps
  • popping noise when turning into driveways
  • knock from front suspension at low speed
  • loose or unsettled front-end feel

How to Fix

Inspect front strut mounts, bearings, sway bar end links, control arm bushings, and spring seating. Replace worn mounts and links in pairs, then perform an alignment if struts or mounts are removed. On lowered cars, verify correct end-link preload and that springs are properly indexed in the perches.

Typical repair cost:$250 - $900

Research This Issue

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Community Reported
Medium Confidence

On the 2005-2010 Ford Mustang, s197 Mustangs are known to suffer from water intrusion at the cowl/windshield area that reaches the Smart Junction Box (SJB)/fuse box, leading to erratic electrical behavior. Owners report inoperative or self-activating wipers, lighting faults, battery drain, no-start conditions, and multiple unrelated electrical issues after rain or car washes. Ford published service information addressing water leak diagnosis and SJB-related corrosion concerns on these cars.

This issue also affects: Ford Transit, Ford Bronco Sport, Ford F-150

Common Symptoms

  • Wipers operate by themselves or stop working
  • Headlights or interior lights malfunction
  • Battery drain after rain
  • Intermittent no-start
  • Multiple electrical accessories acting erratically

How to Fix

Inspect the passenger-side cowl, windshield seal area, body seams, and SJB/fuse box for signs of moisture, corrosion, or water tracks. Repair involves correcting the leak path, cleaning or replacing corroded connectors, and replacing the SJB if internal damage is present. Drain paths and cowl seals should be restored so the replacement module is not damaged again.

Typical repair cost:$250 - $1,400

Research This Issue

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Community Reported
High Confidence
NHTSA Recalls9 recalls

AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

Ford Motor Company (Ford) is recalling certain 2014 Ford Mustang vehicles sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." Additionally, Ford is recalling certain 2011 Ford Ranger and Mercury Milan vehicles, 2011-2012 Ford Fusion and Lincoln Zephyr/MKZ vehicles and 2011-2014 Ford Mustang vehicles sold, or ever registered, in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B." Ford is also recalling certain 2010 Ford Edge and Lincoln MKX vehicles, 2010-2011 Ford Ranger and Mercury Milan vehicles, 2010-2012 Ford Fusion and Lincoln Zephyr/MKZ vehicles, and 2010-2014 Ford Mustang vehicles sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C." These vehicles are equipped with air bag inflators assembled as part of the passenger frontal air bag modules, used as original equipment or replacement equipment (such as after a vehicle crash necessitating replacement of the original air bags), that may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.

Campaign #19V00100007/01/2019
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Frequently Asked Questions

What are the most common Ford Mustang problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2008 Ford Mustang has 6 documented issues. The most frequently reported are: S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag, Takata Driver Airbag Inflator Rupture Risk, Fuel Tank Cracking and Fuel Vapor/Fuel Leak at Tank Seam or EVAP Area. Of these, 3 are rated critical and should be addressed promptly.

Is the Ford Mustang reliable?

The 2008 Ford Mustang has 6 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 3 issues are rated critical: S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag and Takata Driver Airbag Inflator Rupture Risk and Fuel Tank Cracking and Fuel Vapor/Fuel Leak at Tank Seam or EVAP Area. 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 Ford Mustang problems?

Repair costs for known Ford Mustang issues range from $0 to $1,800, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag, typically costs $700-$1,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2005-2010 Ford Mustang S197 Passenger Seat Occupant Classification Sensor Fault Causing Airbag Warning and Disabled Passenger Airbag?

On 2005-2010 Mustangs, the passenger seat occupant classification system (OCS) can fail or become inaccurate, illuminating the airbag warning lamp and causing the passenger airbag to be disabled. Ford issued Customer Satisfaction Program 15B24 for certain vehicles because the OCS… Repairs typically run $700-$1,800. Severity: high.

What is the 2005-2014 Ford Mustang Takata Driver Airbag Inflator Rupture Risk?

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 compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

  • Recalls9
  • FAQ
  • AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

    Ford Motor Company (Ford) is recalling certain model year 2005-2014 Mustang vehicles manufactured April 6, 2004, to June 21, 2014, and 2005-2006 GT vehicles manufactured February 20, 2004, to September 22, 2006. The affected vehicles are equipped with a dual-stage driver frontal air bag that may be susceptible to moisture intrusion which, over time, could cause the inflator to rupture.

    Campaign #15V31900028/05/2015

    AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

    Ford Motor Company (Ford) is recalling certain air bag inflator and/or module replacement service parts that may have been used as part of a collision repair. The parts include certain driver-side air bag inflators and/or modules, designed to fit 2005-2014 Ford Mustang and Mustang GT500. It also includes certain passenger-side air bag inflators and/or modules designed to fit 2005-2014 Ford Mustang, 2010-2012 Lincoln MKZ, 2010-2012 Ford Fusion, 2010-2011 Mercury Milan, 2007-2011 Ford Ranger, and 2007-2010 Lincoln MKX vehicles. Please see Ford's recall report for the specific part numbers. These parts may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.

    Campaign #21E01300016/02/2021

    AIR BAGS:FRONTAL

    Ford Motor Company (Ford) is recalling certain 2005-2014 Mustang, 2004-2011 Ranger, 2009-2011 Mercury Milan, 2006 Ford GT, 2008-2012 Fusion, 2007-2010 Edge and Lincoln MKX, and 2009-2010 Lincoln MKZ vehicles. These vehicles may be equipped with a driver or passenger frontal air bag inflator used as a replacement service part, that may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.

    Campaign #21V08100016/02/2021

    AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE

    Ford Motor Company (Ford) is recalling certain model year 2007-2011 Ford Ranger vehicles, 2006-2011 Ford Fusion, Mercury Milan and Lincoln Zephyr/MKZ vehicles, 2007-2010 Ford Edge, Lincoln MKX vehicles, 2005-2006 Ford GT vehicles, and 2005-2011 Ford Mustang vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A." Additionally, unless included in "Zone A" above, Ford is recalling certain model year 2007-2008 Ford Ranger, Edge and Lincoln MKX vehicles, 2006-2008 Ford Fusion, Mercury Milan and Lincoln Zephyr/MKZ vehicles, 2005-2006 Ford GT vehicles and 2005-2008 Ford Mustang vehicles originally sold, or ever registered, in Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia, or "Zone B." Any vehicle not included in "Zone A", or "Zone B" is not included in the safety recall. 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 front air bags, these inflators may rupture due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.

    Campaign #16V38400031/05/2016

    + 4 more recalls. Check all on NHTSA.gov

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

    Many 2005-2014 Mustangs were included in the Takata airbag inflator recalls. The driver airbag inflator can degrade over time, especially in hot and humid climates, and may rupture during deployment, sending metal fragments into the cabin. This is a major safety defect documented… Repairs typically run $0-$0. Severity: high.

    What is the 2005-2010 Ford Mustang Fuel Tank Cracking and Fuel Vapor/Fuel Leak at Tank Seam or EVAP Area?

    S197 Mustangs from the mid-2000s have a documented pattern of fuel tank cracking or leaking, often near the seam or around the evaporative emissions components. Owners report strong fuel odor in garages, visible dripping after fill-ups, and EVAP-related warning lights. Because th… Repairs typically run $900-$1,800. Severity: high.

    What is the 2005-2010 Ford Mustang 4.0L Cologne V6 Thermostat Housing Cracking and Coolant Leaks?

    The 4.0L SOHC V6 used in 2005-2010 Mustangs commonly develops coolant leaks from the composite thermostat housing and related seals. The plastic housing can warp or crack with age and heat cycling, causing external coolant seepage and sometimes overheating if the leak worsens. Th… Repairs typically run $250-$700. Severity: medium.

    What is the 2005-2014 Ford Mustang Front Strut Mount and Sway Bar End Link Clunking on S197 Suspension?

    A common S197 complaint is front-end clunking or popping over bumps, driveways, and low-speed turns caused by worn upper strut mounts, strut bearings, or sway bar end links. The issue is widely discussed in owner forums and often appears as mileage accumulates or after lowering s… Repairs typically run $250-$900. Severity: medium.

    What is the 2005-2010 Ford Mustang 2005-2010 Smart Junction Box Water Intrusion Causing Wiper, Lighting, and Electrical Malfunctions?

    S197 Mustangs are known to suffer from water intrusion at the cowl/windshield area that reaches the Smart Junction Box (SJB)/fuse box, leading to erratic electrical behavior. Owners report inoperative or self-activating wipers, lighting faults, battery drain, no-start conditions,… Repairs typically run $250-$1,400. Severity: medium.