If you plan on swapping in an M52TU, M54, or S54 engine into your e28, our plug and
play harness adapters are the easiest way to go.  Harnesses include the OBD2
diagnostic port, electronic accelerator pedal wiring, and fuel pump relay wiring. Relays
are provided, with the exception of the US S54 EKP module.

• Installation Instructions included
• Extra wire for MPG
• Extra wire for Tachometer signal
• Extra wire for Vehicle Speed Signal
• The oil level sensor option will be included with the M52TU and M54 harnesses (Unless specified otherwise).
• S54 Harnesses are prewired for the U.S. fuel pump relay (Timed EKP
• Module) unless specified otherwise.
• Sensors are not included

* Please leave the following info in the notes section when placing an order:

• Model of your e28 (525, 535, etc.)
• If you require the Secondary Air Pump wiring.

Harness adapters will ship 2-3 days after your order is placed. All adapters are made to order. Because of this, neither returns nor exchanges are accepted.  All sales are final.