BMW i3 Differential Replacement Parts

The BMW i3 was produced in a single generation from 2013 to 2021, with a notable mid-cycle update around 2017 that introduced the 120Ah battery variant alongside the existing 60Ah and 94Ah cars, but the rear-mounted electric motor and differential arrangement remained fundamentally similar across the run. Whether a differential from a pre-2017 car crosses over to a post-2017 car without issue is something you should confirm with the breaker against your specific registration, as there may have been ancillary or mounting changes during that period. Supplying your registration or VIN to the breaker gives them the best chance of matching the right unit.

Yes, the i3s (introduced for the 2018 model year) uses a more powerful motor producing around 184bhp compared to the standard i3's 170bhp, and the differential and drive unit are specific to that higher-output setup, so they are not interchangeable with the standard i3 parts. Always quote whether your car is a standard i3 or an i3s when requesting a quote, and confirm this with the breaker against your registration to be certain. Fitting the wrong unit could result in a mismatch with the car's motor and control systems.

No, the trim level does not affect differential fitment on the BMW i3 — whether your car is a base, Suite, Lodge, Loft, or any other interior pack, the drivetrain components are the same within the same motor variant. What matters is whether you have the standard i3 or the i3s, and which battery and motor combination your car was built with, which you can confirm via a VIN check or your V5. You may find cosmetic or interior differences between cars from different trim levels when visiting a breaker's yard, but these have no bearing on the differential.

The i3 REx variant includes a small two-cylinder petrol generator to extend range, but the drive is still purely electric through the same rear motor and differential arrangement as the standard i3. In principle the differential itself should be the same unit as on the equivalent non-REx model, but you should confirm this with the breaker against your registration before purchasing, as there can be subtle ancillary differences around the drivetrain on REx cars. Giving the breaker your full VIN is the safest approach.

The BMW i3 ran as a single generation from 2013 to 2021, but there was a significant update around 2017 which brought revised battery options and the introduction of the i3s alongside the standard car. Whether a differential from a 2014 car is a direct fit on a 2018 standard i3 is a boundary you should confirm with the breaker against both registrations, as mounting or ancillary changes may have been introduced at that point. State both registration numbers clearly when requesting a quote so the breaker can cross-reference the parts.

This is a question you must put directly to the breaker and, if necessary, a BMW specialist, as whether the i3's drive unit and differential require coding or pairing to the car's ECU or immobiliser system is not something that can be confirmed generically. Some electric vehicle drive components do carry control electronics that may need configuration after fitting, and a breaker experienced with BMW EVs will be best placed to advise you. Do not assume a used unit will be plug-and-play without checking this first.