[400TT]

ADR 25 is for Steering Lock/Transmission Lock/Shifter Lock

ADR 82 is for Immobilsor.

Both are required.

ADR 25 stipulates you can have a steering lock, transmission lock, shifter lock etc. It details the exact requirements.

Lots of production vehicles have an electronic steering lock, but the steering lock design meets ADR 25 and has numerous safety measures incorporated. One of the significant ones is that the steering lock mechanism needs to have a mechanical lock/latch system when in the disengaged state. This protects against steering lock accidentilly engaging if you suffer from a power failure etc while driving.