Problems · NHTSA complaints

2015 BMW 4 Series problems

Owners filed 94 complaints about the 2015 BMW 4 Series with NHTSA between Sep 2014 and Oct 2026. The most-cited component is electrical system (37).

Complaints
94
Filed with NHTSA
Crashes
11
Reported by owners
Fires
4
Reported by owners
Injuries
9
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system37
  2. Engine and engine cooling26
  3. Engine14
  4. Air bags9
  5. Service brakes7
  6. Fuel/propulsion system7
  7. Structure6
  8. Tires4
  9. Power train4
  10. Vehicle speed control3
  11. Seat belts3
  12. Wheels2
  13. Suspension2
  14. Steering2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 7, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20142
20159
20161
20170
201810
20199
20205
20216
20229
20234
20247
202526
20266

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

37 reports1 crash2 fires
“The contact owns a 2015 BMW 428I. The contact stated that while the vehicle was parked, while attempting to start the vehicle, it failed to start. The contact stated that the vehicle eventually started. The vehicle was taken to an independent mechanic, where it was diagnosed with coolant pump failure. The contact was informed that the coolant had been continuously running, causing the battery to completely drain. The contact was informed that the battery needed to be replaced, the radiator needed to be flushed, and the repair of a small oil leak was needed. The vehicle was repaired. The VIN was included in NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System). While driving to the dealer, the loss of communication with the coolant pump warning light illuminated. The contact was informed that the coolant pump had passed the inspection and did not need to be replaced. The contact was informed that the shield was installed as per the recall. The contact stated that upon retrieving the vehicle from the dealer, the battery was completely drained. The contact was informed that the battery needed to be replaced. The dealer was informed that…”
Owner complaint to NHTSAFiled Feb 3, 2026Engine and engine cooling, Electrical systemODI 11715294

Engine and engine cooling

26 reports1 related recall
“The contact owns a 2015 BMW 428I. The contact stated that while driving approximately 29 MPH, the vehicle started to overheat and experienced reduced power, and there was smoke coming from under the hood. The contact stated that there were unknown warning lights illuminated. The contact was able to drive to the residence. Additionally, while driving at 40 MPH, the failure recurred, and the vehicle stalled. The contact was able to pull over to the side of the road. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not contacted. The failure mileage was unknown.”
Owner complaint to NHTSAFiled Mar 4, 2026Engine and engine coolingODI 11721958

Engine

14 reports1 crash2 fires
“The contact owns a 2015 BMW 428i. The contact stated that upon starting the vehicle in colder weather conditions, there was an abnormal clicking sound coming from under the hood. The contact stated that the failure posed a potential safety risk while commuting long distances. Upon further investigation, the contact associated the failure with BMW Lawsuit Case: 17-CV-07386. The manufacturer was notified of the failure by phone, and a case was filed. The failure mileage was approximately 77,000.”
Owner complaint to NHTSAFiled Sep 16, 2026EngineODI 11764729

Air bags

9 reports5 crashes3 related recalls
“A warning message comes on saying the front passenger air bag sensor is defective. I checked with the BMW dealership and with the used car company I bought the car and "bumper to bumper" warranty. The used car company confirmed the car has a bad sensor but I have to pay $1,100. BMW has had several recalls involving sensors in other models and even problems with the 2015 428i convertible. My car had less than 50,000 miles when the fault 1st popped up July 2024. I believe this should be recallled.”
Owner complaint to NHTSAFiled May 20, 2025Air bagsODI 11662223

Service brakes

7 reports3 crashes
“Following front brake service, a 2015 BMW 435xi developed two distinct braking anomalies: aggressive unintended brake application during highway driving in wet conditions with cruise control engaged, and low-speed dragging and abrupt grabbing just before coming to a complete stop. The technical symptoms strongly suggest a malfunction in the Dynamic Stability Control brake-drying routine or an issue with caliper return functionality and sticking brake pads.”
Owner complaint to NHTSAFiled Aug 28, 2026Service brakes, Forward collision avoidanceODI 11760427

Fuel/propulsion system

7 reports1 fire
“I own a 2015 BMW 435i from Checkered Flag (Jaguar) in about 2017. The car is currently experiencing a fuel pump failure of exactly the type that is described here: [XXX] . Your VIN lookup does not show my car is covered by the recall, even though my car is exactly the make and model described in the recall notice. Moreover, the defect my car is experiencing is exactly the defect described in the recall notice. It makes little sense that some cars of this make and model would have a fuel pump problem but not others; it is far more likely the fuel pumps are common to all cares of this make and model and somehow my VIN was left off the recall list. I’d like to ask you to look further into it, as it appears to be quite a coincidence that my fuel pump failed in the manner described in the recall notice. My servicing dealership is Checkered Flag BMW in Virginia Beach VA”
Owner complaint to NHTSAFiled Sep 11, 2024Fuel/propulsion systemODI 11614039
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 7, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.