Cheap BMW 4 Series Exhaust Manifold

The BMW 4 Series F32 generation ran from 2013 to 2020, with a facelift arriving in 2017, and the exhaust manifold fitment is driven by engine code rather than the facelift itself, so a pre-2017 and post-2017 car sharing the same engine code will often use the same manifold. That said, emissions calibration can differ across that 2017 boundary, particularly on diesel units, so you should confirm the donor engine code matches yours exactly before buying. Always ask the breaker to cross-reference against your registration to be sure.

No — the exhaust manifold is engine-specific, and a 420d (typically the B47 four-cylinder diesel) and a 430d (typically the N57 or B57 six-cylinder diesel) use entirely different manifold designs that will not interchange. Always match the donor part to your exact engine code, which you can find on your V5C or by asking a breaker to look up your registration. Fitting the wrong manifold will result in poor sealing, failed emissions, and likely an MOT failure.

Trim level does not affect exhaust manifold fitment on the BMW 4 Series — SE, Sport, M Sport, and M Sport X all use the same manifold for a given engine code, so a manifold from an M Sport car will fit a SE car with the same engine. The only differences you may notice are cosmetic ones further down the exhaust system, such as the style of the rear valance or tailpipe trim, but these do not affect the manifold itself. Match on engine code, not trim badge.

No — petrol and diesel manifolds are completely different components and will not interchange under any circumstances, as the engines, porting, and emissions systems are entirely different. On the diesel side in particular, the manifold integrates closely with the turbocharger and EGR system, so fitment is strictly diesel-engine-specific. Always confirm fuel type and engine code with the breaker when sourcing a used manifold.

A 2014 420d sits in the early F32 generation and is likely to use the N47 diesel engine, while a 2019 420d will use the newer B47 engine — these are different units and their manifolds will not interchange despite the car looking similar and carrying the same badge. Even if you find a 2019 donor car with what appears to be a matching part, you need to confirm the engine codes are identical before purchasing. Ask the breaker to check both registrations against their parts database rather than relying on the model year alone.

Yes, emissions era matters for the exhaust system as a whole, and while the manifold itself is primarily a structural component, its design is tied to the specific engine and emissions configuration of the era it came from. The BMW 4 Series F32 transitioned through Euro 5 and Euro 6 boundaries during its 2013–2020 run, and parts from different emissions generations may not be directly compatible even if the engine family appears similar. Catalytic converter and DPF-related specifics are particularly sensitive here — confirm any emissions-related interchange details directly with the breaker against your registration rather than assuming compatibility.