Home › Models › G42 › Common problems
BMW G42 2 Series coupe common problems
2022–present · 230i / 230i xDrive, M240i / M240i xDrive (B46/B48, B58). The known weak spots of the engines used in the G42, with sources, plus the topics that come up most in BMW's service bulletins and NHTSA recalls for this chassis.
Last updated
B46/B48 engine
230i / 230i xDrive (2022–present) · B46/B48 bulletins →
Oil filter housing and coolant leaks
The oil filter housing / oil cooler gasket and cooling system leaks are the most common repairs on these modular four-cylinders.
BMW bulletins on file for the G42:
- NHTSA 11016435 Coolant expansion tank new-car delivery hold Coolant expansion tank new-car delivery hold on BMW G20/G22/G23/G26 and other models (2025); unsold cars were held for inspection and repair before delivery. Service campaign · Mar 2025
- SIB 34 02 25 Coolant expansion tank leak Coolant expansion tank leak on BMW G20/G22/G23/G26 and other models (2025); BMW repairs affected cars free under a service campaign. Service campaign · Apr 2025
B58 / B48 oil filter housing (coolant leak): prices →
Fuel tank vent (purge) valve
BMW extended coverage on the EVAP purge valve to 15 years/150,000 miles on many cars. A failed valve sets check-engine codes and can cause rough idle after refuelling.
BMW bulletins on file for the G42:
- SIB 01 01 26 EVAP system warranty extension EVAP system warranty extension on B46/B48/B58 engines (2020–2025); BMW extended the warranty on this part for eligible cars. Warranty extension · May 2026
B58 engine
M240i / M240i xDrive (2022–present) · B58 bulletins →
Oil filter housing, valve cover/PCV and coolant leaks
The B58's best-known repairs: oil filter housing gasket leaks, the valve cover with built-in PCV, and coolant leaks from the water pump or expansion tank.
BMW bulletins on file for the G42:
- NHTSA 11016435 Coolant expansion tank new-car delivery hold Coolant expansion tank new-car delivery hold on BMW G20/G22/G23/G26 and other models (2025); unsold cars were held for inspection and repair before delivery. Service campaign · Mar 2025
- SIB 34 02 25 Coolant expansion tank leak Coolant expansion tank leak on BMW G20/G22/G23/G26 and other models (2025); BMW repairs affected cars free under a service campaign. Service campaign · Apr 2025
B58 / B48 oil filter housing (coolant leak): prices → B58 valve cover / PCV failure: prices → B58 water pump (coolant pump): prices →
Fuel tank vent (purge) valve
Covered by BMW's 15-year/150,000-mile EVAP purge valve extension on many cars.
BMW bulletins on file for the G42:
- SIB 01 01 26 EVAP system warranty extension EVAP system warranty extension on B46/B48/B58 engines (2020–2025); BMW extended the warranty on this part for eligible cars. Warranty extension · May 2026
Most frequent bulletin topics 106 bulletins
| Topic | Bulletins | Examples |
|---|---|---|
| Central display | 6 | SIB 65 20 25, SIB 65 07 26 |
| Steering | 4 | SIB 65 09 26, SIB 65 19 26 |
| Bluetooth | 4 | SIB 84 02 25, SIB 65 16 25 |
| Navigation | 3 | SIB 65 17 26, SIB 65 28 25 |
| Door | 3 | SIB 41 05 25, SIB 51 04 23 |
| Seat | 2 | SIB 52 01 20, SIB 52 05 25 |
| Steering squeak | 2 | SIB 32 01 23, SIB 31 02 23 |
| Rattle | 2 | SIB 33 01 25, SIB 61 06 15 |
BMW service bulletins and warranty extensions filed with NHTSA that list the G42, grouped by topic. A bulletin tells technicians how to diagnose and fix a known issue; it doesn't mean every car has the problem.
NHTSA recalls by component 5
- steering gear · 1 recall23V770
- digital key ECU software coding · 1 recall23V099
- side air bag cover panel · 1 recall23V039
Matched from NHTSA's public recall file by model and model year. Recall repairs are free; check a VIN.
BMW warranty extensions that list the G42
- SIB 01 01 26 EVAP system warranty extension EVAP system warranty extension on B46/B48/B58 engines (2020–2025); BMW extended the warranty on this part for eligible cars. Warranty extension · May 2026
- SIB 66 07 25 Electrical system warranty extension Electrical system warranty extension on BMW G05/G06/G07/G09 and other models (2024); BMW extended the warranty on this part for eligible cars. Service bulletin · May 2025
If a car qualifies, the listed repair may be free. Check eligibility for the VIN with a BMW center.
Repair prices for these engines
B58 / B48 oil filter housing (coolant leak) B58 valve cover / PCV failure B58 / B48 fuel tank vent valve (purge valve) B58 coolant expansion tank (G05 X5 40i, high- or low-temp) B58 heat management module (thermostat) replacement B58 oil pump replacement B58 water pump (coolant pump)
Prices on these pages are for other chassis with the same engine.
Sources: BMW service bulletins and recalls filed with NHTSA (public data) and the specialist and owner write-ups linked above. Not affiliated with BMW.