A brand new product for 2023, this wiring harness is an extension harness to enable the owner to relocate the engine bay fusebox on any Mk2 Mr2 (Sw20) to anywhere they like on the car. A common mod was always to move the fusebox from the engine bay into the rear boot (trunk for US guys) to clean up the engine bay. This harness makes it possible to extend the vehicles engine harness so that it reaches the new fusebox position in a very clean factory way.

This extension harness is available in lengths from 24" up to 70", which means even relocating the fusebox into the cabin is possible (into the cabin cubby boxes behind the seats for example) or anywhere you like.

If you wanted to relocate the fusebox all the way into the front compartment that can also be accommodated for but please email me for that, the length of wire required will cost more and will be a custom order.

The extension harness caters for all engine types, 3s-ge / 3s-gte / 5s-fe and even all engine converted cars such as 2gr-fe /1mz-fe / 3vz-fe etc and comes with the plastic fusebox clip as shown along with all female sockets for all of the existing male plugs, there are no wires to join or cut using this extension.

Although this wiring extension does cater for the engine harness and ECU, it does not extend the rear light harness to the fusebox, so for boot(trunk) mounted relocations this will be fine, however if you intend to move the fusebox into the cabin you will need to extend the rear light harness yourself.

If you have any questions about this extension harness or have a bespoke order/non Toyota ECU etc please email me This email address is being protected from spambots. You need JavaScript enabled to view it.

For the 24" to 70" extension the price is £325 , for longer extensions please email for a quote.

Please email me after ordering or add a note to the order expressing what length extension you require. This email address is being protected from spambots. You need JavaScript enabled to view it.