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Toyota Supra Problems

Find the most common issues based on Toyota Supra owner complaints.
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Most Common Toyota Supra Problems

The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperat...
At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to b...
Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR ...
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3 Known Toyota Supra Brakes Problems

At higher mileages, an anti-lock brake system wheel speed sensor may wear out and illuminate the ABS warning light. It is recommended to replace the sensor with a factory part and be sure to clea...
As the size of the Supra vehicle gets ever larger, there is a tendency to warp the front rotors. This will be felt as a shudder in the steering wheel when braking. The front rotors can be remachine...
At 125,000-150,000 miles, the Brake Master Cylinder may need replacing. It is critical to adjust the brake pedal to Master Cylinder pushrod clearance or the brakes will drag and over heat.

3 Known Toyota Supra Drive Train Problems

At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to b...
On vehicles with a manual transmission, worn shift bushings can cause the transmission to pop out of gear, especially when coasting down in 1st or 2nd gear. Replacing all the shift linkage bushin...
A code P0770 or P0773 may occur at higher mileages which indicates that the 3-way lock-up solenoid could be defective and may need replacement.

3 Known Toyota Supra Electrical & Lights Problems

If the vehicle will not crank over, the most common problem is the starter, which tend to fail at about 100,00-125,000 miles. Sometimes it is only the starter solenoid contacts, but often the compl...
The MKIV Toyota Supra and Supra Turbo electric window regulator motors wear out much faster than expected. This causes the windows to raise and lower very slowly until they eventually stop working...
The idle air control motors tend to become carboned up at around 100,000 miles and will cause a start and stall and/or stalling at stop sign problems. Many times these valves can be cleaned, howeve...

8 Known Toyota Supra Engine Problems

At higher mileages (125,000+) the Engine Coolant Temperature Sensor may intermittently stop working, especially when the vehicle is fully warmed up. This can cause the engine to stall unexpectedly.
A loss of power on the freeway may due to an internally leaking fuel pulsation dampener. This commonly occurs on higher mileage vehicles.
At higher mileages (125,000+) the mass air flow sensor may cause the vehicle to idle rough, run rich and even stall. Our technicians recommended to replace the Mass Air Flow Sensor with a factory...

6 Known Toyota Supra Exhaust & Emissions Problems

The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperat...
Over the time the exhaust gas recirculation (EGR) system may become plugged with debris, the oxygen sensor may also be getting slow or 'lazy' around this time. When servicing or cleaning the EGR ...
A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Ou...

4 Known Toyota Supra Heating & Air Conditioning Problems

Usually by 150,000 miles the AC system will need some attention, especially in climates where it is used often. Our technicians tell us that it is best to service the AC system every 2-3 years. T...
Typically the AC compressor is worn out by about 150,000 miles in warm and/or humid climates. It is recommended to replace the complete compressor including a new clutch and rpm sensor, and to ...
The AC Expansion Valve may develop a very slow leak or allow too much refrigerant flow which reduces cooling. Our technicians tell us that Toyota makes an updated expansion valve to resolve these...

2 Known Toyota Supra Maintenance Problems

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
Our technicians tell us that it is important to change the coolant with factory coolant and replace the thermostat every 60,000 miles. This will help to protect the head gasket, otherwise the head ...

3 Known Toyota Supra Miscellaneous Problems

The windows on the MKIV Toyota Supra commonly lean in towards the cabin when they are rolled down, and a metal-on-glass rattle is heard with any vibration. As the problem advances, popping may be h...
Our technicians report that by 100,000 miles, the ignition key tends to wear out and should be replaced or it may not work as well in the door locks or ignition lock cylinder.
The third-generation (MKIII) Toyota Supra has a common problem with the rear hatch leaking water into the vehicle. Through normal operation, dirt, leaves, or twigs will build up between the hatch ...

1 Known Toyota Supra Suspension & Steering Problem

The power steering pump and power steering hoses tend to develop leaks and may require replacement.

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Known Toyota Supra Problems & Complaints

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
The 1993-2002 Toyota Supra and Toyota Supra Turbo radiator may crack near the radiator cap. When it cracks, the engine will begin to run warmer than normal, and eventually will overheat. Overheatin...
The upper radiator hose on the 1993-2002 Toyota Supra is known to buckle, and contact the engine fan. When this occurs, the engine will immediately overheat, and hot coolant will pour on the engine...
The windows on the MKIV Toyota Supra commonly lean in towards the cabin when they are rolled down, and a metal-on-glass rattle is heard with any vibration. As the problem advances, popping may be h...
The MKIV Toyota Supra and Supra Turbo electric window regulator motors wear out much faster than expected. This causes the windows to raise and lower very slowly until they eventually stop working...
The Toyota Supra and Supra Turbo from 1986-1992 (MKIII) is known to leak engine coolant and overheat due to a leaky heater control valve. Drivers will notice a decrease in heater performance, and i...
The third-generation (MKIII) Toyota Supra has a common problem with the rear hatch leaking water into the vehicle. Through normal operation, dirt, leaves, or twigs will build up between the hatch ...
The 1986-1992 Toyota Supra and Toyota Supra Turbo may lose power, fuel economy, and possibly have black smoke from the tail pipe due to a known issue with the knock sensor and/or knock sensor wirin...
The 1986-1992 Toyota Supra and Toyota Supra Turbo used an asbestos type head gasket which commonly fails. Symptoms of a blown head gasket include: -Start and stall, or no start condition -Rough i...
The 1986-1992 Toyota Supra and Toyota Supra Turbo used an asbestos type head gasket which commonly fails. Symptoms of a blown head gasket include: -Start and stall, or no start condition -Rough i...
The power steering pump and power steering hoses tend to develop leaks and may require replacement.
At higher mileages (125,000+) the Engine Coolant Temperature Sensor may intermittently stop working, especially when the vehicle is fully warmed up. This can cause the engine to stall unexpectedly.
The Evaporative system may have problems with the vapor canister releasing charcoal pellets that plug the vent valve. Typically a Code P0441, P0442 and P0446 will be set. The key code is the P0446 ...
As the size of the Supra vehicle gets ever larger, there is a tendency to warp the front rotors. This will be felt as a shudder in the steering wheel when braking. The front rotors can be remachine...
At higher mileages (125,000+) the mass air flow sensor may cause the vehicle to idle rough, run rich and even stall. Our technicians recommended to replace the Mass Air Flow Sensor with a factory...
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