Plastic guide rails hold the timing chain in place.
Applies to the engine B48B20, B48B20O1.
Repair: 700–2,900 EUR
2018–. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Matti Blume / CC BY-SA 4.0
What to watch for
The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.
Plastic guide rails hold the timing chain in place.
Applies to the engine B48B20, B48B20O1.
Repair: 700–2,900 EUR
In these engines the water pump is not belt driven but has its own electric motor.
Applies to the engine B46B20B, B48B20, B48B20O1 and 2 more.
A rubber gasket seals the oil filter housing to the block.
Applies to the engine B48B20, B48B20O1, B58B30 and 2 more.
VANOS adjusts the position of the camshaft with the pressure of the engine oil, and a solenoid valve metres that pressure.
Applies to the engine B58B30, B58B30TU1.
Repair: 80–1,200 EUR
The crankcase ventilation leads the gas that forms in the crankcase back to the intake and separates the oil out of it on the way.
Applies to the engine B48B20, B48B20O1, B58B30 and 1 more.
Repair: 80–900 EUR
The ZF eight speed automatic (BMW Steptronic 8HP family) has two faults, and you can feel both.
Applies to the transmission ZF8HP, ZF8HP70.
The maker builds the charge pipe out of plastic, and the coupler at the throttle body is the critical point.
Applies to the engine B48B20, B48B20O1, B58B30 and 1 more.
Repair: 100–400 EUR
The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done. The list covers the whole generation. We did not filter it by model year. Some apply only to a narrower production window.
Most recent: 7 July 2026
SR/02180/26Safety recallFire7 July 2026 · EU Safety GateThe RSW22 starter with reinforced water tightness (RWT) may experience increased abrasion of the magnetic contact, causing deposits to build up at the lowest point inside the relay. These deposits may increase relay contact resistance, leading to starting failures or short circuits. If a short circuit occurs, either when attempting to start the vehicle or while driving due to vibration-related movement of the deposits, it could cause a thermal event and increase the risk of fire. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: 07/07/2026
26V056000ELECTRICAL SYSTEM:STARTER ASSEMBLYELECTRICAL SYSTEM:STARTER ASSEMBLY30 January 2026 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2021-2023 Toyota Supra, 2022-2023 2 Series Coupe, 2021-2024 5 Series (xDrive), 2021-2022 Z4, 2022-2024 4 Series (Gran Coupe), 2021-2024 4 Series (Convertible and xDrive Convertible), 2021-2023 4 Series (Coupe), 2021-2024 3 Series, 2021-2023 X4, 2021-2024 X3 vehicles. Please see the recall report for a complete list of all models. The engine starter may overheat and catch fire due to wear on an internal component.
Risk: Fire increases the risk of injury.
Remedy: Dealers will replace the engine starter, free of charge. Owner notification letters were mailed July 21, 2026. Owners may contact BMW customer service at 1-800-525-7417 or Toyota's customer service at 1-800-331-4331. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning March 24, 2026.
SR/00568/26Safety recallFire30 January 2026 · EU Safety GateThe failure concerns the RSW22 starter, type RWT (reinforced for watertightness). Increased abrasion of the magnetic contact can lead to the formation of deposits at the lowest point of the relay interior. This in turn can increase the resistance of the relay contact, causing accidental ignition or even short circuits, possibly leading to a thermal reaction and fire. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: 30/01/2026
25V636000ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAYELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY23 September 2025 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2019-2021 BMW 330i, 2019-2022 BMW Z4, 2020-2022 BMW 530i, X3, X4, Toyota Supra, 2021-2022 BMW 430i, 430i Convertible, and 2022 BMW 230i vehicles. The engine starter relay may corrode, causing the relay to overheat and short circuit.
Risk: A short circuit in the starter relay may increase the risk of a fire.
Remedy: Owners are advised to park their vehicles outside and away from structures until the remedy is complete. Dealers will replace the engine starter, free of charge. Owner notification letters were mailed February 6, 2026. Owners may contact BMW customer service at 1-800-525-7417. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov November 14, 2025.
23V821000POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)6 December 2023 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2023 Toyota GR Supra, 3 Series Sedan (330i xDrive, M340i xDrive, M3), 5 Series Sedan (530i, 530i xDrive, M5), 4 Series Gran Coupe (430i, 430i xDrive), 4 Series Coupe (430i, 430i xDrive, M440i xDrive), 4 Series Convertible (430i, 430i xDrive, M440i xDrive), 8 Series Coupe (840i, M850i xDrive, M8), 8 Series Convertible (840i, M850i xDrive, M8), 8 Series Gran Coupe (850i xDrive, M8), X3 SAV (X3 xDrive30i, X3M), X4 SAV (X4 xDrive30i), X5 SAV (X5 xDrive40i, X5 M50i, X5M), X6 SAV (X6 xDrive40i, X6 M50i, X6M), and Z4 sDrive30i, Z4 M40i vehicles. The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.
Risk: Transmission oil that leaks into the control unit can lead to a seizure of the transmission gears, causing a sudden loss of drive power and increasing the risk of a crash.
Remedy: Dealers will replace the transmission mechatronics module and the automatic transmission fluid, as necessary, free of charge. Owner notification letters were mailed January 26, 2024. Owners may contact BMW customer service at 1-800-525-7417.
23V099000VISIBILITY:POWER WINDOW DEVICES AND CONTROLSVISIBILITY:POWER WINDOW DEVICES AND CONTROLS17 February 2023 · NHTSA (USA)BMW of North Americal, LLC (BMW) is recalling certain 2023 8 Series Coupe (840i, 840i xDrive, M850i xDrive, M8), 8 Series Convertible (840i, 840i xDrive, M850i xDrive, M8), 8 Series Gran Coupe (840i, 840i xDrive, M850i xDrive, M8, Alpine B8 xDrive), 2 Series Coupe (230i, 230i xDrive, M240i xDrive, M2), and 2022-2023 Z4 sDrive30i, Z4 M40i vehicles. When the digital key is removed from the vehicle, the Electronic Control Unit (ECU) software may still allow the power windows and sunroof to be closed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 118, "Power-operated Window Systems."
Risk: Unintentionally closing the windows or sunroof without the key present can increase the risk of injury to occupants inside the vehicle.
Remedy: Dealers will update the software for the Electronic Control Unit (ECU), free of charge. In addition, the digital key function via cellular service and Wi-Fi capability will be deactivated until the vehicle is updated with new software. Owner notification letters are expected to be mailed April 11, 2023. Owners may contact BMW customer service at 1-800-525-7417.
21V598000ENGINEENGINE2 August 2021 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2020 M340i, M340i xDrive, 540i, 540i xDrive, X3 M40i, 2020-2021 X4 M40i, 745Le xDrive, 2019-2021 Z4 M40i, and 2020-2021 Toyota Supra vehicles. During engine start, the engine management software may cause loss of braking assist. Full mechanical braking (without assist) remains available.
Risk: Loss of braking assist can increase the risk of a crash.
Remedy: Dealers will update the engine management software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact BMW customer service at 1-800-525-7417.
21V554000SEAT BELTSSEAT BELTS21 July 2021 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2021 2 Series (230i, 230i xDrive, M240i, M240i xDrive), 330e, 330e Xdrive, 4 Series Coupe (430i, 430i xDrive, M440i xDrive) M4 Coupe, M4 Competition Coupe, BMW 4 Series Convertible (430i, M440i), BMW X1 sDrive28i, xDrive28i, 2 Series Gran Coupe (228i, 228i xDrive, M235i xDrive), M2 Competition Coupe, 330i, 330i xDrive, M340i, M340i xDrive, M3, M3 Competition, 530i, 530i xDrive, 540i, 540i xDrive, MINI Hardtop 2 Door (Cooper, CooperS, JCW), X2 sDrive28i, X2 xDrive28i, X2 M35i, Z4 sDrive30i, Z4 M40i, MINI Hardtop 2 Door (Cooper SE), MINI Convertible (Cooper, Cooper S, JCW), MINI Clubman (Cooper S, Cooper S All4, JCW), MINI Countryman (Cooper, Cooper All4, Cooper S, Cooper S All4, JCW All4), Rolls Royce Ghost, MINI Countryman (Cooper S E All4), Rolls Royce Phantom, Rolls Royce Cullinan, and Toyota Supra vehicles. The passenger seat belt Automatic Locking Retractor (ALR) may deactivate early, before the webbing fully retracts. As such, these assemblies fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Risk: During a crash, a seat belt retractor that does not function as intended increases the risk of injury.
Remedy: Dealers will inspect the seat belt retractors (including the seat belts) and, if necessary, replace the retractors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact BMW customer service at 1-800-525-7417; 1-866-825-1525 (MINI); 1-877-877-3735 (Rolls Royce); and 1-888-270-9371 (Toyota).
20V700000FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLYFUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY12 November 2020 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2020-2021 Z4 and 2020-2021 Toyota Supra vehicles. The weld between the fuel tank halves may have been insufficiently welded, causing the weld to fail.
Risk: The failed weld may allow fuel to leak, increasing the risk of a fire in the presence of an ignition source.
Remedy: BMW will notify owners, and dealers will replace the fuel tank, free of charge. The recall began December 18, 2020. Owners may contact BMW customer service at 1-800-525-7417 or Toyota customer service at 1-888-270-9371.
20V516000EXTERIOR LIGHTING:HEADLIGHTSEXTERIOR LIGHTING:HEADLIGHTS27 August 2020 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2019-2020 Z4 sDrive30i, Z4 M40i and 2020 Toyota Supra vehicles. The headlamps are able to be adjusted horizontally. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices and Associated Equipment."
Risk: Should the headlamps be adjusted horizontally, there could be increased glare and reduced visibility for oncoming drivers, or reduced visibility for the vehicle operator, thereby increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the headlamp vertical and horizontal adjustment plugs, correcting them as necessary, free of charge. The recall began December 23, 2020. BMW owners may contact BMW customer service at 1-800-525-7417 or Toyota owners may contact Toyota customer service at 1-888-270-9371.
20V355000STEERING:LINKAGES:TIE ROD ASSEMBLYSTEERING:LINKAGES:TIE ROD ASSEMBLY15 June 2020 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2019 Z4 sDrive30i, 2019-2020 330i xDrive, M340i and M340i xDrive, 2020 X3M and X4M, and Toyota Supra vehicles. In certain driving conditions, such as high temperatures and rough road surfaces, a steering gear tie rod may become damaged, possibly resulting in a fractured tie rod.
Risk: A damaged or fractured tie rod may affect vehicle handling and control, increasing the risk of a crash.
Remedy: BMW and Toyota will notify owners, and dealers will replace the steering gear tie rods, free of charge. The recall began August 14, 2020. Owners may contact BMW customer service at 1-800-525-7417 or Toyota customer service at 1-888-270-9371.
19V850000EXTERIOR LIGHTING:HEADLIGHTSEXTERIOR LIGHTING:HEADLIGHTS27 November 2019 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2020 Z4 M40i, Z4 sDrive30i, 330i and 330i xDrive vehicles as well as 2020 Toyota Supra vehicles. The headlight control units may fail causing a loss of one or both of the headlights.
Risk: Headlight failure can reduce the driver's visibility, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace the headlight control units, free of charge. The recall is expected to begin January 17, 2020. Owners may contact BMW customer service at 1-800-525-7417 or Toyota customer service at 1-888-270-9371.
19V732000ENGINEENGINE15 October 2019 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2019-2020 330i, 330i xDrive, and 2019 Z4 vehicles. The needle roller bearings of the counterbalance shafts may have been improperly installed, potentially causing the counterbalance shaft to loosen.
Risk: If the counterbalance shaft loosens, severe engine damage could occur, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace the engine, free of charge. The recall began December 13, 2019. Owners may contact BMW customer service at 1-800-525-7417.
19V684000BACK OVER PREVENTION: SENSING SYSTEM: CAMERABACK OVER PREVENTION: SENSING SYSTEM: CAMERA27 September 2019 · NHTSA (USA)BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020 X4 xDrive, X4 M40i, X4 M, X7 xDrive, X7 M50i, 740Li, 740Li xDrive, 750Li, 750Li xDrive, 8 Series Convertible and Coupe 840i, 840i xDrive, M850i xDrive, X5 sDrive, X5 xDrive, X5 M50i, X6 xDrive, X6 M50i, 330i, 330i xDrive, M340i, M340i xDrive, Z4 sDrive, Z4 M40i, 740Le xDrive and 745Le xDrive, 2018-2019 640i xDrive Gran Turismo and Rolls-Royce Phantom, 2019 M850i xDrive Gran Coupe and Rolls-Royce Cullinan and 2020 Toyota Supra vehicles. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."
Risk: The lack of an image in the back-up camera display increases the risk of a crash.
Remedy: BMW will notify owners, and dealers will update the back-up camera software, free of charge. The recall began November 8, 2019. Owners may contact BMW customer service at 1-800-525-7417 or Rolls-Royce at 1-877-877-3735. Toyota owners may contact Toyota customer service at 1-888-270-9371.
A12/00031/20Safety recallInjuriesno date · EU Safety GateThe headlight control unit may have been damaged in the course of the supplier’s production process. This could result in a short circuit in the control unit, causing the headlights, headlamp illumination or the turn-signals to fail, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00068/19Safety recallInjuriesno date · EU Safety GateThe press-in force of the counterbalance shaft’s bearing shells may not have met the specifications, which could cause the counterbalance shaft to become loose. As a result, the engine could be damaged and locked in motion, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00133/21Safety recallFire, Injuriesno date · EU Safety GateThe fuel tank may not have been manufactured in accordance with the specifications. As a result, in the event of an accident, fuel could leak from the tank and/or the welded joint could split, increasing the risk of fire.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/00184/24Safety recallInjuriesno date · EU Safety GateDue to a manufacturing error, the weld seam of the integrated transmission control unit (ITCU) may not have been correctly executed. As a result, transmission oil could leak into the ITCU, causing it to fail. This may lead to transmission seizure, increasing the risk of an accident. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/01162/20Safety recallInjuriesno date · EU Safety GateA vibration fatigue failure of the track rod may occur due to to an exceptional bending load. Such a failure would lead to a loss of wheel control on one side of the vehicle, increasing the risk of an accident.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0518/19Safety recallInjuriesno date · EU Safety GateOwing to a fixture missing on the accelerator pedal module, a cable could cause the pedal to get stuck in the kick-down position. This could lead to accidents.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
SR/03830/25Safety recallFireno date · EU Safety GateWater may come into contact with the starter relay and gradually cause corrosion. This could affect the electrical connection inside the relay and make the engine difficult to start. It may also result in a short circuit and could cause the starter to overheat leading to a fire when the vehicle is in motion or when it is parked with the ignition off. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
G29 · 2018–
The fault list opens on the version page.
4 versions
2.0 l · 1998 cm³
B48B20 · ZF8HP
Z4 Roadster sDrive20i
2019–2022 · Z4 Roadster sDrive20i
2.0 l · 1998 cm³
B46B20B · B48B20O1 · ZF8HP
Z4 Roadster sDrive30i
2019–2022 · Z4 Roadster sDrive30i
3.0 l · 2998 cm³
B58B30 · GS6
Z4 Roadster M40i
2022– · Z4 Roadster M40i
3.0 l · 2998 cm³
B58B30 · ZF8HP
Z4 Roadster M40i
2019–2022 · Z4 Roadster M40i
Neighbouring generations
G29 (2018-). If the listing is from the changeover year, look at the neighbour too.
Common questions
2018–. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.
No. It depends on the engine and the transmission too.
The fault list is.
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.