Used Mercedes-Benz EQB Gearbox

The Mercedes-Benz EQB (W243) has been offered as a single generation from 2021 onwards, so a 2022 unit and a 2024 unit sit within the same generation — however, the EQB is an all-electric vehicle and its drive unit functions as the gearbox, meaning the specific motor and drive unit code matters far more than the model year alone. Because ancillary and mounting details can shift mid-production within a generation, you should confirm with the breaker against your exact registration before purchasing. Never assume year-for-year compatibility without checking the unit codes.

No — the EQB 250 uses a single rear-axle drive unit while the EQB 350 4MATIC uses a dual-motor all-wheel-drive setup with separate front and rear drive units, so the two are not interchangeable. The drive unit you need is determined entirely by the motor configuration and output code on your vehicle, not by the badge or trim level. Always confirm the exact unit code with the breaker against your registration to make sure the part matches your drivetrain.

No, trim level does not affect gearbox fitment on the EQB — AMG Line, Sport, and any other trim designation are purely cosmetic and equipment-led distinctions that have no bearing on the drive unit fitted. What matters is your motor variant (for example EQB 250 or EQB 300 4MATIC) and the associated drive unit code, which you can confirm via your V5 or a VIN check. The breaker will need your registration and motor details, not your trim name.

Because the EQB is fully electric, the 'gearbox' is an integrated drive unit, and the most important detail is the motor output variant — for instance EQB 250 (single motor, rear-wheel drive) or EQB 300/350 4MATIC (dual motor, all-wheel drive) — along with the specific drive unit or motor code found via a VIN check or your V5. Providing your full registration to the breaker allows them to cross-reference the exact unit required and flag any mid-production changes that could affect fitment. Do not rely on the model year alone, as production updates can alter the unit specification without a change in the outward badge.

The EQB W243 generation launched in 2021 and received a mid-cycle update, so if your vehicle sits either side of that production change it is worth treating the question with caution even though the broad generation is shared. Whether a drive unit from a pre-update car crosses cleanly to a post-update car is something you must confirm with the breaker against both registrations, as mounting points and ancillary connections can change without a formal new-generation designation. Additionally, ECU pairing and immobiliser coding requirements are something to raise directly with your breaker and workshop rather than assume.

This is a genuine concern with electric drive units, as ECU pairing and immobiliser coding can apply depending on the vehicle's software configuration — however, whether coding is required in your specific case is something you must confirm with the breaker and your workshop rather than take as given. A specialist Mercedes-Benz technician or a breaker experienced with EQB drivetrains will be best placed to advise on whether the unit will need programming to your VIN. Do not assume a used drive unit will be plug-and-play without checking this point first.