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BMW 1-Series Most Common Problems (All Years)

29
water pump
24
ignition coil pack
15
CHMSL lens / cover / housing
13
fuel injector
13
window regulator mechanism
12
oil filter housing gasket / oil filter stand gasket
10
thermostat
9
ABS wheel speed sensor
9
valve cover gasket
9
window motor
7
A/C evaporator
6
entire turbocharger
6
fuel pump
5
A/C compressor
5
A/C recharge (no parts replaced)
5
blower motor / HVAC interior fan
5
oil pan seal / gasket
5
tail light housing / assembly
4
audio / nav / infotainment control panel or head unit
4
convertible top upholstery
 
3   6   9   12   15   18   21   24   27   30  
Chart is based on 391 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.