Toyota Supra 2JZ-GE

The Toyota Supra 2JZ-GE has a reliability score of 88/100, rated "EXCELLENT". Legendary inline-six, nearly bulletproof naturally aspirated

The most frequently reported issues are Timing Belt Failure Risk at High Mileage, Valve Tapping / Rod Knock from Oil Neglect, Piston-to-Wall Clearance and Bore Wear on Very High Mileage Engines, ACIS (Acoustic Controlled Induction System) Butterfly Valve Failure, among others. See the Known Issues section above for symptoms, affected mileage, and repair costs.

Yes, this is a documented issue on the 2JZ-GE, typically appearing around 100,000-160,000 km. The 2JZ-GE uses a timing belt rather than a chain, unlike its GTE turbo sibling. Neglected belts on high-mileage examples are the single biggest risk on this engine. Access to the front timing components requires removal of the radiator, fan, and accessory drive, so it is not a quick job. This is an interference engine, so a snapped belt bends valves and can damage pistons. Typical repair cost: €400-900. DIY difficulty: Hard.

Yes, this is a documented issue on the 2JZ-GE, typically appearing around 150,000-250,000 km. The DOHC 24-valve head is not particularly sensitive by design, but engines with extended oil change intervals or run on cheap oil develop noticeable valvetrain tapping and, in worse cases, rod bearing knock. This is almost always a maintenance history problem rather than a design flaw, but it is common enough on cars bought with no records to be worth flagging. Typical repair cost: €800-3,000. DIY difficulty: Hard.

Yes, this is a documented issue on the 2JZ-GE, typically appearing around 200,000-300,000 km. The 2JZ-GE uses conventional cast pistons rather than modern low-expansion hypereutectic designs, so clearances open up over very high mileage, especially if oil intervals were stretched. This typically only becomes a real issue well past 300,000 km on neglected engines. Typical repair cost: €1,500-4,000. DIY difficulty: Hard.

Yes, this is a documented issue on the 2JZ-GE, typically appearing around 120,000-200,000 km. The ACIS variable-length intake system uses vacuum-operated butterfly valves that stick or fail with age. This costs low-end torque and can trigger a rough idle or an intake-related fault code, but does not damage the engine. Typical repair cost: €150-500. DIY difficulty: Moderate.

Yes, this is a documented issue on the 2JZ-GE, typically appearing around 80,000-200,000 km. The factory alarm ECU and door/bonnet sensor wiring on A80 chassis cars degrade with age, occasionally causing the alarm to trigger spontaneously or refuse to disarm. This is an annoyance rather than a mechanical issue and does not affect engine reliability. Typical repair cost: €100-400. DIY difficulty: Easy.

The 2JZ-GE is one of the most reliable inline-six engines ever produced, and a well-maintained A80 Supra with this engine can realistically exceed 300,000 km without major internal work. The single most important check is timing belt history, this is an interference engine and an unknown belt is a non-negotiable immediate replacement job. Avoid any example without clear maintenance records or with signs of oil neglect, as the valve train and lower end will show the consequences quickly. Budget around €500-900 upfront for timing belt service on any new purchase, and you will likely enjoy many years of very low running costs.

The power difference between variants is small and not a reliability factor. Manual versus automatic changes only the ECU tune and rev limit, not durability. The 1997-on VVTi head gives a noticeably broader torque curve and slightly better low-end response, so if condition and history are equal, a post-1997 VVTi car is the nicer engine to drive day to day. None of these variants carries a different reliability risk profile, timing belt history and oil change discipline matter far more than which variant you buy.

Before buying, check: Verify full timing belt service history, if undocumented, budget for immediate replacement of belt, tensioner, idler, and water pump; Cold-start the engine and listen carefully for valve tapping or rod knock before oil pressure builds; Check for blue exhaust smoke at startup and monitor oil consumption over a short test drive; Scan for fault codes including ACIS-related intake codes and verify butterfly valve operation; Inspect alarm system function and check for any signs of wiring corrosion on door and bonnet sensors.

There's no fixed mileage limit, it depends on maintenance. The parts worth budgeting for proactively are: Timing Belt and Tensioner (100,000 km or immediately if history unknown), ACIS Intake Butterfly Actuator (120,000-150,000 km), Valve Cover Gaskets (150,000-200,000 km). Engines that clear these checkpoints with documented maintenance commonly continue well beyond typical ownership periods.

Estimated ownership cost is €2,500-4,500 over 3 years including consumables, timing belt service amortised, and typical age-related repairs on a well-maintained example, based on known issues and typical service needs.

Owners report real-world fuel consumption of around 12 L/100km.

Community-reported real-world usage suggests changing oil every 6,000 km using 5W-30 or 10W-30 full synthetic, meeting Toyota or API SN/SP standard, often more conservative than the official service schedule.

The 2JZ-GE is also found in: Toyota Aristo (JZS147), Toyota Crown (JZS155/JZS171), Toyota Mark II / Chaser / Cresta (JZX90/JZX100), Lexus GS300 (JZS147/JZS160), Lexus IS300 (JCE10).

Overwhelmingly positive. The 2JZ-GE is treated as a benchmark for naturally aspirated inline-six reliability and tunability. Community discussions focus primarily on performance modifications rather than reliability complaints, which itself reflects the engine's strong reputation. The main concern raised is timing belt neglect on unknown-history vehicles.