BMW G82 M4 vs G80 M3 — Which Parts Fit Both?

The BMW G80 M3 and G82 M4 are siblings in every meaningful sense — they share the same S58 engine, the same chassis platform, the same drivetrain options, and much of the same interior architecture. They were engineered together and launched together. So it's a logical question: when you're shopping for parts, which components are interchangeable between the two?

The answer is nuanced. Some parts are genuinely shared. Others look similar but are model-specific. And some are unique to each car's body style. This guide breaks it all down.

The G80 and G82 — What's the Same?

Both cars are built on BMW's CLAR platform with the same wheelbase, the same front and rear track width, and the same engine bay. The S58 3.0-litre twin-turbocharged inline-six is identical across both models. The front and rear subframe architecture is shared, the brake package is the same, and the suspension geometry is closely matched.

This platform-sharing is significant for parts buyers because it means a large category of mechanical and drivetrain components transfers directly between cars.

Parts That Fit Both G80 M3 and G82 M4

Engine and Drivetrain Components

All S58 engine components are shared across G80 and G82. Intake systems, intercooler upgrades, charge pipes, oil cooler kits, turbo inlet pipes, and exhaust manifolds are all compatible between both models. If you're building power on either car, the same parts list applies.

Exhaust Systems

Downpipes, cat-back exhaust systems, and valved exhaust conversions designed for the S58 platform will fit both the G80 and G82. The exhaust routing from the manifold back to the rear bumper exit is identical on both cars, so aftermarket exhaust manufacturers typically list their products as compatible with both models.

Suspension and Brakes

Coilover kits, spring and damper upgrades, front and rear sway bars, camber adjustment hardware, and brake upgrade kits are all shared between the G80 and G82. The suspension geometry and mounting points are identical, meaning a set of coilovers developed for the G80 will install directly onto the G82 without modification.

Wheels

Both cars use the same bolt pattern (5x112) and the same hub bore diameter. Wheel and spacer fitment that works on one will work on the other. Always verify individual wheel offset against your specific setup, but in terms of mechanical compatibility, G80 and G82 wheels are fully interchangeable.

Parts That Do NOT Cross Over

Exterior Body Components

This is where buyers most commonly make mistakes. The G80 is a four-door saloon; the G82 is a two-door coupe. Their body lines are different, their door apertures are different, and their bumper mounting points — while dimensionally similar — are not identical.

Front and rear bumpers, side skirts, front splitters, rear diffusers, and boot lid spoilers are all model-specific. A G82 front splitter will not fit a G80 bumper correctly, and vice versa. Always buy body parts listed specifically for your chassis code.

Doors and Door Components

The G80 has four doors; the G82 has two. Door panels, door glass, mirrors, and door-mounted components are not interchangeable between the two cars.

Roof and Pillars

The roofline of the G82 coupe is completely different to the G80 saloon's. Carbon fiber roof replacements, roof spoilers, and anything that mounts to or integrates with the roof structure is model-specific.

The Practical Takeaway

If you're shopping for mechanical upgrades — engine, exhaust, suspension, brakes, wheels — the G80 and G82 are effectively the same car. Buy with confidence for either model.

If you're shopping for exterior body components, always verify the specific chassis code before purchasing. The similarities between these cars make it easy to assume compatibility where it doesn't exist.

At Velocity Car Parts, all listings clearly specify whether parts fit the G80, the G82, or both. Browse the G80 M3 collection and the G82 M4 collection and shop with confidence.