N54 to E30 Wiring Harness

This Wiring Harness allows you to swap the N54 engine into the E30 chassis.

This is as close to a complete plug and play solution that you can get. Featuring an OBD2 plug that you can use with a scan tool, JB4, or MHD to see live data, fault codes and flash your DME.
This harness will use the factory E30 gauges and ignition switch.

To use this harness, you will need the following from the N54 donor car:

– Matching Key, DME, CAS module set
– Accelerator pedal (although an E46 pedal is recommended for a better fit into the E30 chassis)
– Ignition key slot and the cable that goes to CAS module
– The wiring harness that goes from the DME to the Engine.

If you would also like to use the OEM E30 coolant temp gauge, you will need to install the M20 coolant temp sensor somewhere on the N54. We recommend using an aluminum radiator and having a bung installed on it. We sell the temperature sensor needed <here>

We can provide any or all of these items if you do not have them, at an additional cost. Please contact us for current pricing on these items or if  you have any other questions this swap.

Note: These harnesses are custom built to order so please allow 4-6 weeks for delivery.