Mercedes-Benz B-Class Turbo Replacement Parts

Both years fall within the W246 generation (2011–2018, facelift 2014), but the facelift brought potential changes to ancillary fittings and engine management that may affect direct swap compatibility. The engine code is the key detail here — if both cars share the same engine code, the core turbo unit is likely to be the same, but you should confirm with the breaker against your registration whether mounting brackets and pipework match across the pre- and post-2014 facelift boundary. Never assume fitment purely on year.

No — fuel type is fundamental to turbo compatibility, and diesel and petrol turbos are entirely different units built to different specifications. Always specify your fuel type clearly when requesting a quote, as well as the engine code from your V5 or a VIN check, which pinpoints the exact variant. Mixing fuel types here is not a grey area.

The gearbox itself does not directly change the turbo specification, but certain engine and gearbox combinations were packaged together by Mercedes-Benz, meaning a particular engine code may have been paired exclusively with a manual or an automatic in the UK market. Always quote your engine code and gearbox type when asking a breaker for a turbo, so they can match the right donor vehicle. The engine code remains the single most reliable identifier.

Trim level — Sport, SE, or AMG Line — does not affect turbo fitment on the B-Class; these are cosmetic and equipment-level distinctions rather than mechanical ones. What matters is the engine code, which is shared across trim levels running the same engine. You may find the donor car your breaker is pulling from is a different trim to yours, but that has no bearing on whether the turbo will fit.

The engine code is the most important detail you can supply — it identifies the exact engine fitted to your car regardless of model year, trim, or badge, and is found on your V5 registration document or via a VIN check. For the W246 B-Class, common diesel codes include OM651 variants and common petrol codes include M270 and M133 variants, but confirm yours before ordering as sub-variants can differ in turbo specification. Giving the engine code to your breaker upfront will save time and reduce the risk of ordering the wrong unit.

Broad year-range listings can be a useful starting point, but the W246 B-Class received a facelift in 2014, after which some engine ancillaries and fittings may have changed, so a turbo listed across that whole range may not be a straightforward bolt-on at every point in production. Confirm with the breaker by providing your engine code and registration, so they can check the donor vehicle's spec against yours. Listings that skip the engine code entirely are worth treating with caution.