How hard is a Mitsubishi 4M41 Defender swap?

A 4M41 swap into the Defender 90, Defender 110 and Defender 130 is a big job, but a good workshop can do it with a complete kit. Most of the time goes into the mounts, the adapter and the wiring.

The usual steps are: remove the old engine, fit the new mounts and the adapter plate, set the engine in, connect the wiring and the engine computer, then fit the cooling and the exhaust. A test drive and a final check follow.

Our kits come with parts that are made to work together, which saves time and guesswork. What we list: Mitsubishi 4M41 3.2 DI-D conversion kits for the Defender.

Before you start, check your local rules for registration and road tests after an engine change. We supply invoices and documents that help with this.