Used BMW 8 Series Radiator

The current BMW 8 Series (G14/G15/G16) launched in 2018, and while there was a mild refresh around 2022, the generation boundaries are well established. Whether a radiator from a pre-2022 car crosses to a post-2022 car without modification is something you should confirm with the breaker against your registration, as ancillary fittings and mounting points can change mid-production. Give the breaker your engine code from your V5 or a VIN check, as that is the single most reliable detail for matching this part.

The engine code matters above everything else for a mechanical part like a radiator, because BMW fits different engines — for example the B58 six-cylinder and the S63 twin-turbo V8 — into the same body, and these require different cooling setups. The year alone is not sufficient, and the badge (840i, 850i, M8) only hints at the engine rather than confirming it. Locate your engine code on the V5 or via a VIN check before contacting a breaker, and share that code directly.

The 840i uses a straight-six engine (B58 family) while the M8 uses the S63 twin-turbo V8, so the cooling requirements and radiator specifications are different and the parts are very unlikely to interchange. Trim level and badge make no difference to fitment here — what matters is that these are fundamentally different engines. Always quote your engine code to the breaker so they can match the correct unit.

Body style does not affect radiator fitment — the cooling system follows the engine code and drivetrain, not whether the car is a coupe, convertible, or Gran Coupe. A breaker may have pulled a radiator from any of those body styles and it can still be the right part for your car, provided the engine code and gearbox type match. Focus on supplying your engine code and fuel type rather than worrying about which bodystyle the donor car was.

Both years sit within the same G15 generation (2018 onwards), and sharing the same 840d badge and engine family is a good indicator of compatibility. However, ancillary connections and mounting details can change mid-production even within a generation, so you should confirm the interchange with the breaker against both registrations rather than assuming it is a straight swap. Providing your engine code gives the breaker the best chance of verifying the match quickly.

M Sport is a cosmetic and chassis-options trim package and does not change the engine or cooling system, so it has no effect on radiator fitment. A standard 840i and an 840i M Sport with the same engine code will use the same radiator. What the breaker does need from you is the engine code, fuel type, and gearbox type — not the trim level.