Toyota GR Supra A90

BMW turbo four-cylinder from the joint venture, paired with its own calibration. The lighter engine improves weight distribution and makes the car more agile in tight corners than the larger six-cylinder counterpart, while still pulling strongly from low revs. Engine note supplemented via the speakers from the factory. Timing chain mounted on the gearbox side; follow BMW service intervals and oil specification strictly. Typical of modern BMW turbo petrols are valve-cover gaskets and Vanos wear at higher mileage. When buying, check for oil traces, clean boost build-up and the software/service status.

• !! Factory oil filter disintegrates on first change from 15,000 km

  The factory-fitted UFI oil filter in the B48B20 can disintegrate during the first oil change and release filter fragments into the oil circuit, potentially causing engine damage. BMW covers costs when documented service intervals can be proved. Only early production batches are affected.

  Symptoms: Metal particles in oil, oil pressure warning, engine noise after first oil change
  0–8,000 $
  Ad BMW B48 oil filterMANN HU 816 x11428507683
• !! Timing Chain Guide Breaks from 60,000 km

  The B48B20 is known for breaking timing chain guides, documented in the BMW motor-talk.de forum and on motorschmiede.com. Guides can crack from approximately 50,000 km and damage the timing chain.

  Symptoms: Rattle from the engine bay, sudden engine failure, check engine light with chain fault
  800–3,000 $
  Ad Timing chain guide B48B20Timing chain GR Supra B48 Toyota A90
• !! Timing chain stretch (BMW B48) from 120,000 km

  The BMW B48B20 in the Supra 2.0 shares the well-known timing chain issue of the B-engine family. Regular oil changes with BMW-approved oil are essential.

  Symptoms: Rattling on cold start; rough idle; camshaft position error codes
  800–2,000 $
  Ad timing chain B48B20chain tensioner BMW B48 Supra

+ 6 more engine weaknesses + vehicle weaknesses

BMW turbo four-cylinder from the joint venture, paired with its own calibration. The lighter engine improves weight distribution and makes the car more agile in tight corners than the larger six-cylinder counterpart, while still pulling strongly from low revs. Engine note supplemented via the speakers from the factory. Timing chain mounted on the gearbox side; follow BMW service intervals and oil specification strictly. Typical of modern BMW turbo petrols are valve-cover gaskets and Vanos wear at higher mileage. When buying, check for oil traces, clean boost build-up and the software/service status.

• !! Factory oil filter disintegrates on first change from 15,000 km

  The factory-fitted UFI oil filter in the B48B20 can disintegrate during the first oil change and release filter fragments into the oil circuit, potentially causing engine damage. BMW covers costs when documented service intervals can be proved. Only early production batches are affected.

  Symptoms: Metal particles in oil, oil pressure warning, engine noise after first oil change
  0–8,000 $
  Ad BMW B48 oil filterMANN HU 816 x11428507683
• !! Timing Chain Guide Breaks from 60,000 km

  The B48B20 is known for breaking timing chain guides, documented in the BMW motor-talk.de forum and on motorschmiede.com. Guides can crack from approximately 50,000 km and damage the timing chain.

  Symptoms: Rattle from the engine bay, sudden engine failure, check engine light with chain fault
  800–3,000 $
  Ad Timing chain guide B48B20Timing chain GR Supra B48 Toyota A90
• !! Timing chain stretch (BMW B48) from 120,000 km

  The BMW B48B20 in the Supra 2.0 shares the well-known timing chain issue of the B-engine family. Regular oil changes with BMW-approved oil are essential.

  Symptoms: Rattling on cold start; rough idle; camshaft position error codes
  800–2,000 $
  Ad timing chain B48B20chain tensioner BMW B48 Supra

+ 6 more engine weaknesses + vehicle weaknesses

BMW inline-six, 3.0 litres single-turbo, and one of the best six-cylinders of the last few decades. The closed-deck aluminium block with forged crankshaft and forged conrods shrugs off remarkable abuse: 480 to 500 hp at the wheels runs on stock internals, four-figure builds leave the block untouched. Sound: a sonorous, deep grumble, punchy rather than shrill up top. The weak points are almost all in the periphery, not the core: a brittle plastic oil filter housing with a coolant leak, a valve-cover PCV that whistles and burns oil, wastegate rattle at part throttle. Maintenance truth: change the oil well before the lifetime interval, every 8,000 to 12,000 km, and the block lasts virtually forever. The timing chain and the block are the most robust parts of the whole engine.

• !! High-pressure fuel pump (HPFP) can generate metal shavings from 60,000 km

  In rare cases the B58 high-pressure fuel pump can produce metal shavings that contaminate the entire fuel system. BMW revised the pump in later production runs.

  Symptoms: Severe power loss; engine misfiring; engine warning light; in the worst case engine stall
  1,500–5,000 $
  Ad high-pressure fuel pump B58high-pressure fuel pump Supra 3.0 BMW
• !! Oil filter degradation on first change from 15,000 km

  Identical to other BMW B-engines: the factory UFI oil filter in the B58B30 can shed dissolved filter debris into the oil circuit on the first change, blocking channels and causing engine damage. Issue limited to early production batches.

  Symptoms: Metal particles in oil, engine noise, oil pressure loss after first oil change
  0–10,000 $
  Ad BMW B58 oil filterMANN HU 819 x11427905201
• !! Oil filter housing gasket leak (coolant) from 100,000 km

  The brittle plastic oil filter housing warps from heat cycling and lets coolant escape; in the worst case oil and coolant mix. It develops gradually from around 80,000 to 100,000 km and is the subject of a class action across the engine family.

  Symptoms: Gradual coolant loss, oil on the left side of the block, in the worst case oil-coolant mixing.
  600–3,000 $
  Ad oil filter housing B58 11428583895OFHG B58 coolantoil filter housing gasket Supra 3.0

+ 9 more engine weaknesses + vehicle weaknesses

BMW inline-six, 3.0 litres single-turbo, and one of the best six-cylinders of the last few decades. The closed-deck aluminium block with forged crankshaft and forged conrods shrugs off remarkable abuse: 480 to 500 hp at the wheels runs on stock internals, four-figure builds leave the block untouched. Sound: a sonorous, deep grumble, punchy rather than shrill up top. The weak points are almost all in the periphery, not the core: a brittle plastic oil filter housing with a coolant leak, a valve-cover PCV that whistles and burns oil, wastegate rattle at part throttle. Maintenance truth: change the oil well before the lifetime interval, every 8,000 to 12,000 km, and the block lasts virtually forever. The timing chain and the block are the most robust parts of the whole engine.

• !! High-pressure fuel pump (HPFP) can generate metal shavings from 60,000 km

  In rare cases the B58 high-pressure fuel pump can produce metal shavings that contaminate the entire fuel system. BMW revised the pump in later production runs.

  Symptoms: Severe power loss; engine misfiring; engine warning light; in the worst case engine stall
  1,500–5,000 $
  Ad high-pressure fuel pump B58high-pressure fuel pump Supra 3.0 BMW
• !! Oil filter degradation on first change from 15,000 km

  Identical to other BMW B-engines: the factory UFI oil filter in the B58B30 can shed dissolved filter debris into the oil circuit on the first change, blocking channels and causing engine damage. Issue limited to early production batches.

  Symptoms: Metal particles in oil, engine noise, oil pressure loss after first oil change
  0–10,000 $
  Ad BMW B58 oil filterMANN HU 819 x11427905201
• !! Oil filter housing gasket leak (coolant) from 100,000 km

  The brittle plastic oil filter housing warps from heat cycling and lets coolant escape; in the worst case oil and coolant mix. It develops gradually from around 80,000 to 100,000 km and is the subject of a class action across the engine family.

  Symptoms: Gradual coolant loss, oil on the left side of the block, in the worst case oil-coolant mixing.
  600–3,000 $
  Ad oil filter housing B58 11428583895OFHG B58 coolantoil filter housing gasket Supra 3.0

+ 9 more engine weaknesses + vehicle weaknesses