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BMW Z4 Most Common Problems

21
convertible top motor / hydraulic pump
16
control arm bushing / compliance bushing / tension strut bushing / thrust arm bushing
15
valve cover gasket
14
starter
13
ignition coil pack
13
radiator hose / engine coolant pipe
12
bulb: headlight
12
coolant reservoir / expansion tank
8
thermostat
7
control arm / tension strut / thrust arm / lateral link
7
end link or bushing for stabilizer bar
7
water pump
6
coil spring
6
engine intake hose / tube / boot
6
module / computer for ABS / traction control / stability control
5
alternator
5
exterior trim / body side molding / roof molding
5
oxygen sensor
5
radiator
5
suspension bushing, unknown or unspecified
 
3   6   9   12   15   18   21   24   27   30  
Chart is based on 343 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.

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