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Mitsubishi · Known Issues

1991 Mitsubishi 3000GT Problems: 9 Known Issues

1991 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1991 Mitsubishi 3000GT has 9 documented known issues, with 6 rated critical. The most serious are AWD Transfer Case Oil Leak Leading to Bearing Failure and Driveline Lockup (VR-4), Front Brake Hose Cracking at Full Steering Lock (NHTSA Recall 96V-143), VR-4 4WS Rear Steering Pump and Hard Line Leaks ($150-$2,000 repair), ECU Electrolytic Capacitor Leakage Causing Stalling and No-Start (1991-1993) ($100-$600 repair), Timing Belt and Hydraulic Tensioner Failure Destroying the Interference DOHC 6G72 ($700-$4,500 repair) and Getrag AWD Manual Transmission Synchro Wear and Gear Grind (VR-4 5-Speed/6-Speed) ($2,000-$4,500 repair). Across all issues with published estimates, repair costs range from $50 to $4,500. DIY maintenance guides at au7o.io.

In This Article

  • 3000GT Electrical2
  • 3000GT Engine2
  • 3000GT Drivetrain1
  • 3000GT Brakes1
  • 3000GT Steering1
  • 3000GT Transmission1
  • 3000GT Exhaust1
  • Recalls2
  • FAQ
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In This Article

  • Electrical2
  • Engine2
  • Drivetrain1
  • Brakes1
  • Steering1
  • Transmission1
  • Exhaust1
  • Recalls2
  • FAQ

All 9 Known Issues

NHTSA Recalls2 recalls

POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)

ON CERTAIN PASSENGER VEHICLES, A CONDITION EXISTS THAT ALLOWS OIL TO LEAK FROM THE ALL-WHEEL DRIVE TRANSFER CASE.

Campaign #02V14300114/05/2002

EQUIPMENT:OTHER:LABELS

CERTAIN PASSENGER VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, 'OCCUPANT CRASH PROTECTION.' THE BILINGUAL ENGLISH/SPANISH REMOVABLE AIR BAG WARNING LABELS AFFIXED TO THE DASH AND TO THE SUNVISOR DO NOT MEET THE SIZE REQUIREMENTS OF THE STANDARD.

Campaign #04V42800001/09/2004

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Frequently Asked Questions

What are the most common Mitsubishi 3000GT problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1991 Mitsubishi 3000GT has 9 documented issues. The most frequently reported are: AWD Transfer Case Oil Leak Leading to Bearing Failure and Driveline Lockup (VR-4), Front Brake Hose Cracking at Full Steering Lock (NHTSA Recall 96V-143), VR-4 4WS Rear Steering Pump and Hard Line Leaks. Of these, 6 are rated critical and should be addressed promptly.

Is the Mitsubishi 3000GT reliable?

The 1991 Mitsubishi 3000GT has 9 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 6 issues are rated critical: AWD Transfer Case Oil Leak Leading to Bearing Failure and Driveline Lockup (VR-4) and Front Brake Hose Cracking at Full Steering Lock (NHTSA Recall 96V-143) and VR-4 4WS Rear Steering Pump and Hard Line Leaks and ECU Electrolytic Capacitor Leakage Causing Stalling and No-Start (1991-1993) and Timing Belt and Hydraulic Tensioner Failure Destroying the Interference DOHC 6G72 and Getrag AWD Manual Transmission Synchro Wear and Gear Grind (VR-4 5-Speed/6-Speed). 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 Mitsubishi 3000GT problems?

Repair costs for known Mitsubishi 3000GT issues range from $50 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 1991-1993 Mitsubishi 3000GT AWD Transfer Case Oil Leak Leading to Bearing Failure and Driveline Lockup (VR-4)?

NHTSA recalls 93V033000 and 02V143001 establish that certain AWD 3000GT transfer cases can leak oil. A low oil level can damage bearings and may result in drivetrain lockup, increasing crash risk. The 1993 campaign addressed certain 1991 VR-4 vehicles; the later campaign covered… Severity: high.

What is the 1991-1994 Mitsubishi 3000GT Front Brake Hose Cracking at Full Steering Lock (NHTSA Recall 96V-143)?

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.

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ALL YEARS199919981997199619951994199319921991

On the 1991-1993 Mitsubishi 3000GT, the electrolytic capacitors inside 1991-1993 ECUs leak corrosive electrolyte with age and heat cycling, eating copper traces off the circuit board. The result is erratic running, stalling, intermittent or complete no-start, and — if left long enough — an unrepairable ECU. The 3000GT/Stealth community considers preventive recapping mandatory on any unrepaired first-generation car; a telltale fishy 'rotten seafood' odor from the center console means electrolyte is already escaping.

Common Symptoms

  • Intermittent hard start or no-start
  • Engine stalling or sudden power loss while driving
  • Erratic idle and random driveability glitches
  • Fishy or rotten-seafood smell from the center console
  • Rapid clicking or chattering from under the dash

How to Fix

Remove the ECU and have the three electrolytic capacitors replaced (about $1 each in parts, or $100-300 at an electronics/ECU repair service), with board trace repair if electrolyte damage has started. Recap proactively before symptoms appear — a board with eaten traces may need a replacement ECU.

Typical repair cost:$100 - $600

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High ConfidenceVerifiedReviewed Jun 2026

On the 1991-1993 Mitsubishi 3000GT, pre-facelift cars use motorized pop-up headlights controlled by the ETACS body module, and after 30+ years the motors, internal position switches, fuses, and ETACS relays commonly fail. Lights stick up, stick down, raise slowly, or only one side operates (the classic 'wink'). Because the motor always spins one direction and is stopped by a position switch inside the assembly, diagnosis confuses many owners — replacing a motor alone often does not fix it.

Common Symptoms

  • One or both headlights will not raise or retract
  • One headlight stuck up while the other works (the 'wink')
  • Slow, jerky, or grinding headlight movement
  • Lights respond to the manual dash button but not the headlight switch

How to Fix

Diagnose systematically: try the manual pop-up button (if it works there but not from the headlight switch, suspect the column switch; if neither works, test the fuse, motor, internal position switch, and ETACS unit). Used motors and ETACS repairs are the usual fix; a manual knob under the hood raises the lights as a roadside workaround.

Typical repair cost:$100 - $600

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On the 1991-1999 Mitsubishi 3000GT, the DOHC 24-valve 6G72 in the SL and VR-4 is an interference engine: if the timing belt snaps or the known-weak hydraulic tensioner bleeds down and lets the belt skip teeth, pistons strike open valves. Documented failures have bent as many as 17 of the engine's 24 valves, turning a missed $1,000 service into a $3,000-5,000 cylinder head job. Oil from leaking cam seals or valve covers contaminating the belt accelerates failure, and the cramped transverse V6 layout makes the 60,000-mile/5-year service frequently deferred.

Common Symptoms

  • Ticking, whirring, or slapping noise from the front timing cover
  • Engine cranks freely but will not start after a belt failure
  • Sudden rough running or misfires after the belt skips teeth
  • Oil seepage around the timing covers contaminating the belt
  • Unknown or overdue belt service history

How to Fix

Replace the timing belt, hydraulic tensioner, idler pulleys, and water pump as a set every 60,000 miles or 5 years, fixing any cam/crank seal oil leaks at the same time. On a car with unknown service history, do the belt service before driving the car hard.

What you need to fix it

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

  • Gates TCKWP195A DOHC timing-belt component kit with water pump
    OEMGates TCKWP195A

    1991-1999 3000GT DOHC 6G72 scheduled or contamination-driven timing-system service branch Fitment/availability: The inspected direct U.S. page identifies Gates TCKWP195A and its belt, tensioner, hydraulic tensioner, idler, water pump, ga…

    MVP Motorsports

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:$700 - $4,500

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On the 1991-1999 Mitsubishi 3000GT, the 6G72's hydraulic lash adjusters are prone to internal varnish buildup and wear, producing the platform's famous ticking noise at idle that rises with RPM. Dirty oil or extended change intervals make the adjusters bleed down and stick, increasing valvetrain clearance. It is mostly an annoyance, but a chronically loud, sticking adjuster accelerates rocker and cam lobe wear over time.

Common Symptoms

  • Rhythmic ticking from the top of the engine at idle
  • Tick frequency increases with engine RPM
  • Noise is loudest at cold start and may fade when warm
  • Tick improves temporarily after an oil change

How to Fix

Start with frequent oil changes and a cleaning additive regimen (community-proven options include a Rislone or Lucas treatment cycle, or pulling and cleaning the adjusters); persistent tick is cured by replacing the 24 lash adjusters, with upgraded 'big bore' Gen3 lifters or solid-lifter conversions sold specifically for this engine.

What you need to fix it

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

  • 3SX later-style Gen3 big-bore hydraulic lash adjusters, set of 24
    OEM3SX LIFTERGEN3SET24

    1991-1999 3000GT DOHC 6G72 confirmed hydraulic-lash-adjuster wear branch Fitment/availability: The inspected direct specialist page offers the later-style set of 24 and explicitly states 6G72 DOHC-only fitment for turbo and non-turbo 300…

    3SX Performance

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:$50 - $1,500

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On the 1991-1993 Mitsubishi 3000GT, nHTSA recalls 93V033000 and 02V143001 establish that certain AWD 3000GT transfer cases can leak oil. A low oil level can damage bearings and may result in drivetrain lockup, increasing crash risk. The 1993 campaign addressed certain 1991 VR-4 vehicles; the later campaign covered a broader 1991-1999 population. Coverage and completion must be checked by VIN rather than inferred from model year alone.

Common Symptoms

  • VIN recall status and campaign history checked
  • transfer-case leakage and fluid level documented
  • bearing or gear damage assessed before repair selection

How to Fix

Check the VIN for recall 02V143001 and any earlier transfer-case campaign history. If the recall is open, arrange the manufacturer remedy. Inspect the transfer case for leakage and damage; the federal remedy calls for resealing and refilling a leaking undamaged case, or replacing the case when damage is present. Do not buy seals, bearings, fluid or a replacement transfer case from this page; recall status, installed case identification and inspection findings determine the repair.

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On the 1991-1994 Mitsubishi 3000GT, nHTSA recall 96V143001 establishes that on affected 1991-1994 3000GT vehicles, a front wheel-side brake hose can crack under full-lock steering and full suspension travel, causing brake-fluid leakage. The resulting warning lamp and reduced braking efficiency increase crash risk. Recall inclusion and completion are VIN-specific; vehicle age by itself does not prove the recalled hose remains installed or that all four hoses require replacement.

Common Symptoms

  • VIN recall status and completion checked
  • front hoses inspected through steering and suspension travel
  • fluid leak source and hydraulic condition documented

How to Fix

Check the VIN for recall 96V143001 and confirm whether the revised front wheel-side hose assemblies were installed. If the campaign is open, arrange the manufacturer remedy. Independently inspect every flexible hose, hard line, fitting and caliper for the actual leak or age damage and restore the hydraulic system using the vehicle-specific service procedure. Do not buy stainless-braided lines or a four-hose kit from this page; recall status, the installed hose and inspection findings determine the repair.

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On the 1991-1996 Mitsubishi 3000GT, the all-wheel-steering (4WS) system on the 1991-1996 VR-4 (and select 1991-1993 SL trims) uses a dedicated rear-mounted hydraulic pump driven off the rear-differential pinion. The pump's flanged metal feed line is mounted under the car and rusts heavily over time. When the line corrodes through or the pump seal fails, owners lose all 4WS fluid quickly, trigger the 4WS warning light, and can even lose front power steering assist because the system shares a fluid reservoir. Replacement is brutal because the bolted-on hard line is not sold separately - a full new rear pump assembly runs ~$900+ and parts can take 3 months to source.

Common Symptoms

  • 4WS warning light illuminated on dashboard
  • Puddle of red/amber power steering fluid under rear of vehicle
  • Power steering reservoir empties repeatedly
  • Loss of front power steering assist (shared reservoir)
  • Whining noise from rear pump area
  • Visible rust or wet residue on the hard line at the back of the rear pump

How to Fix

Inspect the flanged feed/return line at the rear pump for rust and weeping. For small low-pressure leaks, cut out the corroded section and bridge with high-pressure hose and double-clamped fittings as a temporary fix. For high-pressure-side or pump-internal leaks, the proper repair requires dropping the rear subframe to access the pump (parts ~$900 OEM, labor 6-10 hours). Many long-term VR-4 owners install a 4WS delete kit with block-off plates that bypasses the rear pump and hard-locks the rear steering rack, eliminating the failure point entirely ($150-$400 in parts).

Typical repair cost:$150 - $2,000

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On the 1991-1999 Mitsubishi 3000GT, the Getrag-built AWD gearboxes in the VR-4 (W5MG1 5-speed through 1993, W6MG1 6-speed from 1994) are notorious for worn synchronizers, especially 1st-2nd and 2nd-3rd, causing grinding shifts. The synchros are undersized for the mass of the gears at high engine speed, so spirited driving wears them quickly; continuing to drive through the grind chews up gears and sliders, many of which are no longer available new. Rebuilds require specialist knowledge and parts kits from community vendors.

Common Symptoms

  • Grinding on the 1-2 or 2-3 shift, especially at higher RPM
  • Notchy, baulky shifting when cold
  • Crunch when downshifting without rev-matching
  • Gradually worsening refusal to engage a gear quickly

How to Fix

Rebuild the transmission with updated synchro kits (R'venge Performance, Jack's Transmissions and similar specialists supply parts) at the first sign of regular grinding, before gear and slider damage compounds the bill. Use the correct fluid and double-clutch or slow shifts to extend synchro life in the meantime.

What you need to fix it

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

  • R'venge W5MG1 five-speed AWD transmission rebuild kit
    OEMR'venge rvengeGetragRebuild

    1991-1993 3000GT VR-4 W5MG1 teardown-confirmed synchronizer/bearing/seal rebuild branch Fitment/availability: The inspected direct U.S.

    R'venge Performance
  • R'venge W6MG1 six-speed AWD transmission rebuild kit
    OEMR'venge rvengeGetragRebuild-1

    1994-1999 3000GT VR-4 W6MG1 teardown-confirmed synchronizer/bearing/seal rebuild branch Fitment/availability: The inspected direct U.S.

    R'venge Performance

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:$2,000 - $4,500

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On the 1991-1994 Mitsubishi 3000GT, early VR-4s have an Active Exhaust System with a driver-selectable Tour/Sport valve in the rear exhaust; the system was phased out after the 1994 model year. The valve shaft corrodes and seizes (usually stuck in the quiet Tour position) and the actuator cable rots away, so toggling the switch changes nothing. The valve's D-shaped shaft rounds off so the external lever can move while the internal plate stays shut, and the sealed assembly cannot be easily disassembled for repair.

Common Symptoms

  • No exhaust tone change when switching between Tour and Sport
  • Exhaust permanently quiet and restrictive (valve stuck in Tour)
  • Active exhaust switch light works but nothing happens
  • Corroded or detached actuator cable at the rear muffler valve

How to Fix

Free a seized valve with extended penetrating-oil soaks and careful heat cycles — a well-documented community procedure — and replace the rotted actuator cable, or fit a replacement/used valve assembly. Many owners simply wire the valve open or delete it with an aftermarket exhaust.

Typical repair cost:$50 - $450

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get a full repair guide

NHTSA recall 96V143001 establishes that on affected 1991-1994 3000GT vehicles, a front wheel-side brake hose can crack under full-lock steering and full suspension travel, causing brake-fluid leakage. The resulting warning lamp and reduced braking efficiency increase crash risk. Severity: high.

What is the 1991-1996 Mitsubishi 3000GT VR-4 4WS Rear Steering Pump and Hard Line Leaks?

The all-wheel-steering (4WS) system on the 1991-1996 VR-4 (and select 1991-1993 SL trims) uses a dedicated rear-mounted hydraulic pump driven off the rear-differential pinion. The pump's flanged metal feed line is mounted under the car and rusts heavily over time. When the line c… Repairs typically run $150-$2,000. Severity: high.

What is the 1991-1993 Mitsubishi 3000GT ECU Electrolytic Capacitor Leakage Causing Stalling and No-Start (1991-1993)?

The electrolytic capacitors inside 1991-1993 ECUs leak corrosive electrolyte with age and heat cycling, eating copper traces off the circuit board. The result is erratic running, stalling, intermittent or complete no-start, and — if left long enough — an unrepairable ECU. The 300… Repairs typically run $100-$600. Severity: high.

What is the 1991-1999 Mitsubishi 3000GT Timing Belt and Hydraulic Tensioner Failure Destroying the Interference DOHC 6G72?

The DOHC 24-valve 6G72 in the SL and VR-4 is an interference engine: if the timing belt snaps or the known-weak hydraulic tensioner bleeds down and lets the belt skip teeth, pistons strike open valves. Documented failures have bent as many as 17 of the engine's 24 valves, turning… Repairs typically run $700-$4,500. Severity: high.

What is the 1991-1999 Mitsubishi 3000GT Getrag AWD Manual Transmission Synchro Wear and Gear Grind (VR-4 5-Speed/6-Speed)?

The Getrag-built AWD gearboxes in the VR-4 (W5MG1 5-speed through 1993, W6MG1 6-speed from 1994) are notorious for worn synchronizers, especially 1st-2nd and 2nd-3rd, causing grinding shifts. The synchros are undersized for the mass of the gears at high engine speed, so spirited… Repairs typically run $2,000-$4,500. Severity: high.

What is the 1991-1993 Mitsubishi 3000GT Pop-Up Headlight Motor and ETACS Failures (1991-1993)?

Pre-facelift cars use motorized pop-up headlights controlled by the ETACS body module, and after 30+ years the motors, internal position switches, fuses, and ETACS relays commonly fail. Lights stick up, stick down, raise slowly, or only one side operates (the classic 'wink'). Bec… Repairs typically run $100-$600. Severity: medium.

What is the 1991-1994 Mitsubishi 3000GT Active Exhaust Valve Seizure and Cable Rot (VR-4)?

Early VR-4s have an Active Exhaust System with a driver-selectable Tour/Sport valve in the rear exhaust; the system was phased out after the 1994 model year. The valve shaft corrodes and seizes (usually stuck in the quiet Tour position) and the actuator cable rots away, so toggli… Repairs typically run $50-$450. Severity: low.

What is the 1991-1999 Mitsubishi 3000GT Hydraulic Lash Adjuster 'Lifter Tick' on the 6G72 V6?

The 6G72's hydraulic lash adjusters are prone to internal varnish buildup and wear, producing the platform's famous ticking noise at idle that rises with RPM. Dirty oil or extended change intervals make the adjusters bleed down and stick, increasing valvetrain clearance. It is mo… Repairs typically run $50-$1,500. Severity: low.