Bosch Says That the 13774/ 13882 (0-124-515-022, 0-124-515-050 - 120A) is Actually a Better Replacement for This 140A Unit Due to a Higher Output Curve at Lower RPM's. So to prevent damaging battery cycling and low voltage at lower RPM, the replacement sol here is the 120 Amp suggested by Bosch in an aftermarket style. Direct Fit Replacement Alternator, 120 Amp, 12 Volt, CW, 6-Groove Pulley. 100% performance tested from component through final assembly to ensure dependable service and reliable performance. 1 Year warranty - Rebuild Parts List Below
For the following models with 140 Amp Bosch Option (Also See Cross Reference to Verify) 
 
BMW Car	 
528i L6 2.8L 1997 
Z3 L6 2.5L 1999-2000 
Z3 L6 2.8L 1997-2000 
Replaces
 BMW 12-31-1-740-629, 12-31-1-740-631
 Bosch 0123515004 
 Bosch Service Europe 0986039720, 0986604129 
 
Other:  13734, 220-5007, AL0835X