Voltage REGULAR. Voltage Regulator.
Voltage Regulator. Included with: Alternator.
Voltage Regulator
Fits Q7, S5
3.6 LITER, 180 amp. 4.2 LITER. Q7; 3.6L. S5; 4.2L.
Alternator Voltage Regulator - Repair or Replace
Your alternator replenishes your battery when your car is running. If you have a battery light, low charge warning, or your recently replaced battery already needs a jump, the alternator in your may need to be repaired or replaced.