Plastic guide rails hold the timing chain in place.
Applies to the engine B48B20.
Repair: 700–2,900 EUR
2020–. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Alexander Migl / 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.
Repair: 700–2,900 EUR
The high pressure pump of these common rail diesels (Bosch CP4) can fail while driving.
Applies to the engine B47D20TU1.
In these engines the water pump is not belt driven but has its own electric motor.
Applies to the engine B48B20, B58B30, B58B30TU1.
The internal fins of the exhaust gas recirculation cooler crack over time, and glycol coolant leaks into the intake, where it mixes with soot.
Applies to the engine B47D20TU1, B57D30T2, B57D30.
On the early model years the timing chain of the B47 stretches faster than intended.
Applies to the engine B47D20TU1.
Repair: 1,200–4,500 EUR
The B47 replaced the N47, and the maker fixed the timing chain problem.
Applies to the engine B47D20TU1, B57D30T2, B57D30.
A rubber gasket seals the oil filter housing to the block.
Applies to the engine B48B20, B58B30, B58B30TU1.
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, B58B30, B58B30TU1.
Repair: 80–900 EUR
3 more faults belong to this generation. On the version page, only the ones that apply stay.
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
SR/00551/26Safety 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
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
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
A12/00441/24Safety recallFireno date · EU Safety GateA defect on the cylinder head cover could allow oil to leak and spread through the engine compartment, creating a 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: Unknown
A12/01785/21Safety recallInjuriesno date · EU Safety GateThe screws which were used to assemble seatbelts and also on the rear seats of the vehicles concerned may not have been manufactured in accordance with specifications. In some cases, the screws in question cannot withstand extreme loads, which could increase the risk of injury in the event of an accident. The product does not comply with the requirements laid down in 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
SR/01734/25Safety recallFireno date · EU Safety GateThe positive battery cable of the starter-generator may not have been manufactured correctly. This could result in a loose electrical connection, leading to excessive contact resistance. The vehicle cannot charge or start. Contact points in the starter-generator could overheat and cause a vehicle 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: Unknown
SR/03825/25Safety recallFire, Injuriesno date · EU Safety GateA defective screw connection between the battery cable and the fuse box in the car boot may become loose. This may result in impaired functioning which can lead to a fire or the engine cutting out during driving which can lead to injuries. 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
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
G22 · 2020–
The fault list opens on the version page.
47 versions
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d Cabrio
2021–2024 · 420d Cabrio
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d Cabrio High Executive
2021–2024 · 420d Cabrio High Executive
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d Coupé
2020–2024 · 420d Coupé
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d Coupé High Executive
2020–2024 · 420d Coupé High Executive
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d Gran Coupé
2021–2024 · 420d Gran Coupé
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d xDrive Coupé
2020–2024 · 420d xDrive Coupé
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d xDrive Coupé High Executive
2020–2024 · 420d xDrive Coupé High Executive
2.0 l · 1995 cm³
B47D20TU1 · ZF8HP
420d xDrive Gran Coupé
2021–2024 · 420d xDrive Gran Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i Cabrio
2021–2024 · 420i Cabrio
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i Cabrio High Executive
2021–2024 · 420i Cabrio High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i Coupé
2020–2024 · 420i Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i Coupé High Executive
2020–2024 · 420i Coupé High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i Gran Coupé
2021–2024 · 420i Gran Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i xDrive Coupé
2020–2024 · 420i xDrive Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
420i xDrive Coupé High Executive
2020–2024 · 420i xDrive Coupé High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i Gran Coupé
2021–2024 · 430i Gran Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Cabrio
2024– · 430i xDrive Cabrio
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Coupé
2024– · 430i xDrive Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Gran Coupé
2021–2024 · 430i xDrive Gran Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i Cabrio
2021–2024 · 430i Cabrio
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i Cabrio High Executive
2021–2024 · 430i Cabrio High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i Coupé
2020–2024 · 430i Coupé
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i Coupé High Executive
2020–2024 · 430i Coupé High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Cabrio
2021–2024 · 430i xDrive Cabrio
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Cabrio High Executive
2021–2024 · 430i xDrive Cabrio High Executive
2.0 l · 1998 cm³
B48B20 · ZF8HP
430i xDrive Coupé High Executive
2020–2024 · 430i xDrive Coupé High Executive
3.0 l · 2993 cm³
B57D30 · ZF8HP70
430d Cabrio
2021–2024 · 430d Cabrio
3.0 l · 2993 cm³
B57D30 · ZF8HP70
430d Cabrio High Executive
2021–2024 · 430d Cabrio High Executive
3.0 l · 2993 cm³
B57D30 · ZF8HP70
430d xDrive Coupé
2020–2024 · 430d xDrive Coupé
3.0 l · 2993 cm³
B57D30 · ZF8HP70
430d xDrive Coupé High Executive
2020–2024 · 430d xDrive Coupé High Executive
3.0 l · 2993 cm³
B57D30 · ZF8HP70
430d xDrive Gran Coupé
2021–2024 · 430d xDrive Gran Coupé
3.0 l · 2993 cm³
B57D30 · B57D30T2 · ZF8HP70
M440d xDrive Cabrio
2021–2024 · M440d xDrive Cabrio
3.0 l · 2993 cm³
B57D30 · B57D30T2 · ZF8HP70
M440d xDrive Cabrio High Executive
2021–2024 · M440d xDrive Cabrio High Executive
3.0 l · 2993 cm³
B57D30 · B57D30T2 · ZF8HP70
M440d xDrive Coupé
2020–2024 · M440d xDrive Coupé
3.0 l · 2993 cm³
B57D30 · B57D30T2 · ZF8HP70
M440d xDrive Coupé High Executive
2020–2024 · M440d xDrive Coupé High Executive
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i Cabrio
2021–2024 · M440i Cabrio
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i Coupé
2020–2024 · M440i Coupé
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i Coupé High Executive
2020–2024 · M440i Coupé High Executive
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i Gran Coupé
2021–2024 · M440i Gran Coupé
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Cabrio
2021–2024 · M440i xDrive Cabrio
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Cabrio High Executive
2021–2024 · M440i xDrive Cabrio High Executive
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Coupé
2020–2024 · M440i xDrive Coupé
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Coupé High Executive
2020–2024 · M440i xDrive Coupé High Executive
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Gran Coupé
2021–2024 · M440i xDrive Gran Coupé
3.0 l · 2998 cm³
B58B30TU1 · B58B30 · ZF8HP
M440i xDrive Cabrio
2024– · M440i xDrive Cabrio
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Coupé
2024– · M440i xDrive Coupé
3.0 l · 2998 cm³
B58B30 · B58B30TU1 · ZF8HP
M440i xDrive Gran Coupé
2024– · M440i xDrive Gran Coupé
Neighbouring generations
G22/G23/G26 (2020-). If the listing is from the changeover year, look at the neighbour too.
Common questions
2020–. 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.