Home › Models › G14 › Common problems
BMW G14 8 Series coupe, convertible and Gran Coupe common problems
2019–present · 840i / xDrive, M850i xDrive (B58, N63 V8). The known weak spots of the engines used in the G14, with sources, plus the topics that come up most in BMW's service bulletins and NHTSA recalls for this chassis.
Last updated
B58 engine
840i / xDrive (2019–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 G14:
- SIB 01 01 21 Thermostat warranty extension Thermostat warranty extension on BMW G05/G06/G07/G11 and other models (2016–2022); BMW extended the warranty on this part for eligible cars. Warranty extension · Nov 2024
- SIB 11 01 20 Oil filter housing cracking Oil filter housing cracking on BMW G01/G02/G05/G07 and other models (2012–2021); BMW explains the cause and the approved repair. Service bulletin · Jun 2021
- SIB 01 17 24 Fuel injectors failure Fuel injectors failure on N63/S63 engines (2015–2021); the fix is replacing the affected part. Warranty extension · Sep 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 G14:
- 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
N63 engine
M850i xDrive (2019–present) · N63 bulletins →
Oil consumption and valve stem seals
BMW issued a dedicated N63/S63 valve seal replacement procedure for cars with verified excessive oil consumption, oil-fouled plugs or smoke.
N63 valve stem seals (oil burning / blue smoke): prices →
Sources: BMW SIB: N63 and S63 valve seal replacement (NHTSA)
N63 Customer Care Package (injectors, sensors, vacuum pump, seals)
For 2009–2014 N63 cars BMW created the Customer Care Package: a check and, if needed, replacement of air mass sensors, piezo injectors, the vacuum pump, turbo intake seals and crankcase vent lines. It's not a recall, so ask a BMW center whether it was done.
BMW bulletins on file for the G14:
- SIB 01 17 24 Fuel injectors failure Fuel injectors failure on N63/S63 engines (2015–2021); the fix is replacing the affected part. Warranty extension · Sep 2025
- SIB 17 03 24 Fuel injectors leak Fuel injectors leak on N63/S63 engines (2018–2022); BMW repairs affected cars free under a service campaign. Service campaign · Jun 2024
Sources: BMW SIB 11 06 14: N63 Customer Care Package (NHTSA)
Turbo coolant lines, valve cover gaskets and timing chains
Hot-vee heat cooks the turbo coolant lines and valve cover gaskets; timing chain stretch is another known item.
N63 turbo coolant lines (coolant leak in the hot V): prices → N63 valve cover gaskets (both banks): prices →
Most frequent bulletin topics 190 bulletins
| Topic | Bulletins | Examples |
|---|---|---|
| Steering | 5 | SIB 66 24 19, SIB 36 01 21 |
| Seat | 5 | SIB 52 03 21, SIB 52 05 25 |
| Key fob | 5 | SIB 61 04 21, SIB 61 22 19 |
| Camera | 5 | SIB 66 08 20, SIB 66 08 23 |
| Instrument cluster | 5 | SIB 66 02 24, SIB 65 08 20 |
| Central display | 4 | SIB 61 05 24, SIB 65 24 22 |
| Radio | 4 | SIB 65 19 22, SIB 65 11 21 |
| Brakes | 4 | SIB 34 07 21, SIB 34 04 19 |
BMW service bulletins and warranty extensions filed with NHTSA that list the G14, 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 10
- engine starter · 1 recall25V644
- engine starter software · 1 recall24V576
- integrated transmission control unit · 1 recall23V821
- digital key ECU software coding · 1 recall23V099
- rearview camera software · 1 recall21V096
- integrated brake system · 1 recall21V062
- n/a – vehicle assembly issue · 1 recall20V761
- pretensioner · 1 recall20V164
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 G14
- SIB 01 15 24 Fuel tank leak check warranty extension Fuel tank leak check warranty extension on BMW G05/G06/G07/G11 and other models (2017–2020); BMW extended the warranty on this part for eligible cars. Warranty extension · Jul 2026
- 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 01 17 24 Fuel injectors failure Fuel injectors failure on N63/S63 engines (2015–2021); the fix is replacing the affected part. Warranty extension · Sep 2025
- SIB 01 01 21 Thermostat warranty extension Thermostat warranty extension on BMW G05/G06/G07/G11 and other models (2016–2022); BMW extended the warranty on this part for eligible cars. Warranty extension · Nov 2024
- SIB 32 02 23 Steering warranty extension Steering warranty extension on BMW G05/G06/G07/G11 and other models (2015–2024); BMW extended the warranty on this part for eligible cars. Service bulletin · Jan 2024
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 N63 valve stem seals (oil burning / blue smoke) N63 turbo coolant lines (coolant leak in the hot V) N63 valve cover gaskets (both banks) 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.