2018 BMW 430I engine problems
14 owner complaints filed with NHTSA name the engine on the 2018 BMW 430I — 39% of all complaints for this model year.
What owners report
“The car has experienced numerous coolant leaks according to the dealer and independent authorized service shops including: - turbo coolant lines - oil filter housing - auxiliary radiator - coolant pump - heat management module - upper radiator hose - expansion tank hose - various other coolant…”
filed May 20, 2026
“2018 430i x drive gran coupe oil filter housing failed. Car started to overheat while driving and the infotainment system indicated that the car is overheating and started to decelerate.”
filed Mar 11, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
The EVAP systems purge (vent) valve limited warranty for defects in materials and / or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.
B010224 · Warranty Program/Extension · issued Jun 26, 2026The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
B010224 · Warranty Program/Extension · issued May 5, 2026Evap system purge (vent) valve ext ltd wty (elw) 15/150
B010224 · Warranty Program/Extension · issued May 2, 2024Pressure control valve (pcv) extended ltd wty 15 years/150,000 miles
B011423 · Service Bulletin/Repair Instructions · issued Nov 13, 2023
Engine problems in other 430I years
| Year | Reports | Share |
|---|---|---|
| 2019 430I | 7 | 33% |
| 2017 430I | 9 | 38% |
Other reported problem areas on the 2018 BMW 430I
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.