BMW S14 Engine & Getrag 5-Speed Gearbox | Rebuilt 2.3L Inline-Four | E30 M3 | Complete Package

Offered for sale is a BMW S14 2.3-liter inline-four engine paired with a Getrag five-speed manual gearbox, originally from a BMW E30 M3. This example was professionally rebuilt between 2016 and 2018 before being acquired by the current owner in February 2022.

The BMW S14 is a motorsport-derived, high-revving four-cylinder engine developed for the iconic E30 M3, featuring a cast-iron block, aluminum 16-valve cylinder head, dual overhead camshafts, and individual throttle bodies. This listing includes all major ancillaries, wiring, differential, and spare components — an exceptional complete setup ideal for restoration, race projects, or period-correct E30 M3 builds.

Technical Specifications

Included Components

Engine & Drivetrain

• BMW S14 2.3L inline-four rebuilt 2016–2018

• Cast-iron block with aluminum 16-valve DOHC cylinder head

• Black crinkle-finished intake plenum with “BMW M Power” lettering

• 46mm throttle body, intake and exhaust camshafts

• Four-into-two exhaust manifold and VAC Motorsports engine mounts

• Samco Sport silicone hoses, cooling lines, and associated hardware

Transmission & Driveline

• Getrag 5-Speed manual gearbox, aluminum casing

• Used clutch assembly

• Driveshaft and rear differential (4.10:1 gear ratio)

• VAC Motorsports transmission mounts and lower transmission cover

Electrical & Management

• Bosch Motronic ECU (engine control module)

• Complete wiring harnesses for ECU and ignition system

• Distributor and alternator assemblies

Additional Parts & Spares

• Upper and lower oil pans (spare set)

• Cooling hoses and fittings

• E30 M3 steering rack

• Assorted motor mounts, brackets, and hardware

Condition & History

• Engine professionally rebuilt from 2016–2018 with new internal components

• Removed from an E30 M3 in running condition

• Stored indoors since rebuild, properly preserved

• Gearbox and clutch in functional condition

• Includes comprehensive ancillaries and spare components, ideal for plug-and-play installation in compatible chassis or rebuild projects

Compatibility

 BMW E30 M3 (direct fit)
 BMW 2002, E21, E30 chassis (custom swap applications)
 Period-correct BMW race builds and vintage rally projects

The S14 engine is BMW Motorsport’s legendary four-cylinder powerplant, derived from the M10 block and M88 head architecture. Its high-revving character, reliability, and racing heritage made it the heart of the E30 M3 Group A touring car — one of BMW’s most successful motorsport platforms.

A rebuilt example with a matching Getrag 5-speed, ECU, wiring, and differential is rarely offered in such complete condition, making this a prime opportunity for collectors, restorers, and enthusiasts seeking authenticity and performance.

BMW S14B23 2.3L Engine & Getrag 5-Speed Manual Gearbox, rebuilt 2016–2018, complete with ECU, wiring, clutch, differential, driveshaft, and spares.
Ideal for E30 M3 restorations, high-performance classic builds, or motorsport applications, representing an authentic piece of BMW M Power heritage.