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Audi A4 / S4 Most Common Problems

113
wheel bearing / hub
87
thermostat
78
ignition coil pack
75
water pump
73
control arm / tension strut / thrust arm / lateral link
69
motor mount
60
valve cover gasket
53
fuel pump
50
PCV valve
43
bulb: headlight
 
12   24   36   48   60   72   84   96   108   120  
Chart is based on 3135 vehicles in TrueDelta's reliability survey.
These are the problems owners most commonly reported on TrueDelta's Car Reliability Survey. 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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