Home · 2017 BMW 4 Series Gran Coupe · Complaints

What 23 owners told NHTSA about the 2017 BMW 4 Series Gran Coupe

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (23)Crash / fire / injury (1)Engine (9)Electrical system (4)Airbags (3)Engine & cooling (3)Seat belts (2)Transmission & drivetrain (2)Body & structure (1)Fuel system (1)Seats (1)Tires (1)

1 of 23 complaints match · Fuel system · clear filters

Jan 13, 2023Transmission & drivetrainEngineFuel system

I have a BMW 430i Gran Coupe, there was a system coolant leak and now they are saying the entire system needs to be replaced because the plastic cracked and eroded from wear and tear. I began checking and found that over 1 million BMW vehicles were recalled for coolant system problems. My car seems it wasn't covered under the recall. I found a service bulletin which stated that certain BMW repairs were necessary to replace coolant line. 2 Service Bulletins - SI B01 29 16 and SIB 17 01 21. I believe my car was covered under the recall that affected EGR module, the issue I am having now could also have been affected by this recall. I see many people online complaining of the coolant leak issue. I had to wait until I got paid to fix it. They are telling me it will cost about $5,000 to repair. Please help.

NHTSA ODI 11501682

Working with the data? Download all 23 complaints as CSV · fetched from NHTSA July 14, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2017 BMW 4 Series Gran Coupe verdict →