BMW S54 Head Gasket Keychain - M3 E46 Z4 M Z3 M Stainless Memento

This stainless-steel head gasket keychain celebrates the BMW S54B32, BMW M’s naturally aspirated 3.2-litre inline-six. Best known as the engine of the E46 M3, it combines individual throttle bodies, double VANOS and an 8,000 rpm maximum engine speed.

Engine Identity

Manufacturer: BMW M GmbH.
Engine code: S54B32, commonly shortened to S54.
Configuration: Longitudinal, naturally aspirated inline-six petrol engine.
Cylinder count: Six.
Displacement: 3,246 cc / 3.2 litres.
Production period: 2001–2008 in BMW M road-car applications; published listings sometimes cite 2000–2011 for broader engine production and service context.
Valvetrain: DOHC, four valves per cylinder, 24 valves total, with double VANOS continuously variable cam timing.
Fuel system: Electronic fuel injection with six individual electronically controlled throttle bodies.

BMW’s S54 training material describes the S54B32 as a 3,246 cc, naturally aspirated, four-valve-per-cylinder inline-six, using double VANOS and a six-speed manual transmission in the E46 M3.

Vehicle Compatibility Matrix

Engine application	Vehicle	Chassis	Production years	Factory output
S54B32	BMW M3 Coupé and Convertible	E46	2001–2006	343 PS / 252 kW and 365 Nm in European specification; 333 hp and 355 Nm in North American specification.
S54B32	BMW Z3 M Roadster	E36/7	2001–2002	325 PS / 239 kW and 354 Nm in European specification; 315 hp / 340 Nm in North American specification.
S54B32	BMW Z3 M Coupé	E36/8	2001–2002	325 PS / 239 kW and 354 Nm in European specification; 315 hp / 340 Nm in North American specification.
S54B32	BMW Z4 M Roadster	E85	2006–2008	343 PS / 252 kW and 365 Nm in European specification.
S54B32	BMW Z4 M Coupé	E86	2006–2008	343 PS / 252 kW and 365 Nm in European specification.
S54B32HP	BMW M3 CSL	E46	2003–2004	360 PS / 265 kW and 370 Nm; a higher-output European-market variant.

The S54B32 was used in the E46 M3, Z3 M Roadster/Coupé and Z4 M Roadster/Coupé. The S54B32HP in the E46 M3 CSL is a higher-output derivative, so its engine calibration and related parts should not be assumed identical to the standard S54B32.

Why This Engine Matters

The S54B32 made more than 100 horsepower per litre without turbocharging or supercharging, producing its E46 M3 peak power at 7,900 rpm. Its six individual throttle bodies, high 11.5:1 compression ratio and double VANOS system gave the engine an unusually sharp response and a distinctive high-rpm character.

The engine also reflects BMW M’s focus on track-capable lubrication: its two-stage oil pump uses separate supply and scavenge sections to move oil from the front of the sump to the main rear sump during demanding braking and cornering. This engineering, together with the forged crankshaft and forged connecting rods, helped make the S54 one of BMW’s defining naturally aspirated straight-sixes.

Technical Specifications

Specification	BMW S54B32
Capacity	3,246 cc / 3.2 litres.
Configuration	Naturally aspirated inline-six petrol engine.
Cylinder head	Aluminium cross-flow DOHC cylinder head; four valves per cylinder, 24 valves total.
Cylinder block	Cast iron.
Bore x stroke	87.0 x 91.0 mm.
Compression ratio	11.5:1.
Maximum engine speed	8,000 rpm.
Camshaft drive	Double-roller timing chain.
Variable valve timing	Double VANOS on inlet and exhaust camshafts.
Intake system	Six individual, electronically controlled throttle bodies.
Fuel	Premium unleaded petrol.
Oil system	Two-stage, chain-driven supply and scavenge oil pump.
Valve diameters	35.0 mm intake; 30.5 mm exhaust.
Standard European output	343 PS / 252 kW at 7,900 rpm; 365 Nm at 4,900 rpm.
North American E46 M3 output	333 hp at 7,900 rpm; 355 Nm at 4,900 rpm.
E46 M3 CSL output	360 PS / 265 kW at 7,900 rpm; 370 Nm at 4,900 rpm.

BMW’s original technical training document was published for North American-market vehicles and quotes 333 hp / 355 Nm for the E46 M3, plus 315 hp / 340 Nm for the Z3 M Roadster and Coupé. European-market figures are higher, and the limited E46 M3 CSL used the 360 PS S54B32HP derivative.

Product Details

Stainless-steel head gasket keychain inspired by the BMW S54B32 3.2-litre inline-six cylinder-head gasket profile.
Designed for owners and enthusiasts of the E46 M3, Z3 M and Z4 M.
Finished using our three-stage vibratory polishing process for a smooth, durable metal finish.
Supplied on a plywood display card for gifting, collecting or display.
A compact tribute to BMW M’s 8,000 rpm, naturally aspirated six-cylinder engine.

FAQ

What is the BMW S54 engine?

The BMW S54, formally S54B32, is a 3,246 cc naturally aspirated inline-six petrol engine with DOHC, 24 valves, double VANOS and six individual throttle bodies.

Which cars use the S54B32 engine?

The S54B32 was fitted to the BMW E46 M3, Z3 M Roadster, Z3 M Coupé, Z4 M Roadster and Z4 M Coupé.

Does every S54 produce 343 PS?

No. Standard European E46 M3 and Z4 M versions are commonly rated at 343 PS, North American versions were rated at 333 hp, and the E46 M3 CSL used the 360 PS S54B32HP derivative.

Is this a functional replacement head gasket?

No. This is a decorative stainless-steel keychain inspired by the BMW S54 head-gasket shape; it is not an engine-service component.

S54 – BMW M3 (E46), Z4 M & Z3 M Head Gasket Keychain