Z4 3.2L 2006-2008
3 SERIES 6 CYL M56 ENGINE
Interchanges With The Following Numbers
BMW: 12-31-7-521-135, 12-31-7-521-136, 12-31-7-521-137, 12-31-7-521-138, 12-31-7-836-610, 12-31-7-837-691
BOSCH REMAN: AL0814X
VALEO: TG15C018, TG15C018B, TG15C098
VALEO NEW: 439486, 439590
VALEO REMAN: 437451, 440064
VALEO TECH: 2542685, 2543292, 2543413
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Includes 1 Year FULL replacement warranty.
Posted by GM on 15th Dec 2013
My BMW Z4M was overcharging my battery, so figured Voltage Regulator had gone bad. BMW Dealership wouldn't sell me the Voltage Regulator but expected me to buy the entire Alternator which cost in upwards of $700. Anyway after a ton of research I landed here, and Ben hooked me up with the right component. Long story short, I installed this and it's solved my problem saving me hundreds of dollars for the same part which BMW sells you with a premium.