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BMW 1-Series Most Common Problems

29
water pump
21
ignition coil pack
15
CHMSL lens / cover / housing
13
fuel injector
12
oil filter housing gasket / oil filter stand gasket
12
window regulator mechanism
10
thermostat
9
valve cover gasket
9
window motor
7
A/C evaporator
7
ABS wheel speed sensor
6
entire turbocharger
6
fuel pump
5
A/C compressor
5
blower motor / HVAC interior fan
5
tail light housing / assembly
4
A/C recharge (no parts replaced)
4
audio / nav / infotainment control panel or head unit
4
convertible top upholstery
4
damper / shock absorber
 
3   6   9   12   15   18   21   24   27   30  
Chart is based on 382 vehicles in TrueDelta's reliability survey.
These are the problems owners most commonly reported on TrueDelta's Car Reliability Survey. For many models not all entries have been coded yet, so focus on the relative numbers rather than the absolute numbers. Usually when people say "they all have this problem," the problem in question actually affects between 10 percent and 20 percent of all cars. We aren't counting wear items like brake pads and rotors that truly do require periodic replacement on all cars.