Remy warns that during its lifespan this BMW 3-series was equipped with a starter based stop-start system – from model year 2008 onwards. It is essential therefore to know if the vehicle you are working on has a stop-start system fitted in order to select the correct replacement starter motor. Vehicles with stop-start have a different starter motor that is more robust to cope with the increased number of engine starts. This goes for both the diesel and petrol models. Choosing the incorrect starter will result in a non-functioning stop-start system.