Spec: Unit Type: Alternator, Voltage: 12, Rotation: CW, Amperage: 80, Clock: 12, Pulley Class: S6, Regulator: IR, Fan Type: IF Replaces OEM Numbers: ARROWHEAD: APR0006, ARROWHEAD (OEM): V439007, BMW: 12-31-1-247-288, 12-31-1-247-310, CARGO: 111946, J & N: 400-40025, LESTER: 13664, REMY LIGHT DUTY: 13312, VALEO: A13VI78, VALEO NEW: 439007, WAI: 13664N Compatible With/Replacement For: BMW: 318i 1994-1999, 318iC 1994-1997, 318iS 1994-1999, 318Ti 1995-1999, Z3 Roadster 1996-1998 1-year warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. But in a rare case that it does not, we'll replace it anytime within one year of your order. If you have a problem, we will take every step to assist you, contact us for a replacement. 100% New aftermarket Alternator built to meet OEM specifications for Bmw