BMW S14 2.3L Engine – E30 M3 (1989)

Presented here is a BMW S14 2.3-liter inline-four engine, reportedly removed from a 1989 BMW E30 M3 acquired by the seller about one year ago. This powerplant represents one of BMW M’s most iconic naturally aspirated engines, originally developed from the M10 architecture and refined with M88 racing technology for the legendary M3.

The S14 features a cast-iron block paired with an aluminum 16-valve cylinder head and dual overhead camshafts, delivering a factory-rated 192 horsepower and 170 lb-ft of torque. This particular example is visually distinguished by its gold crinkle-finished valve cover and intake plenum, both bearing the signature “BMW M Power” lettering — a rare and striking detail for collectors or restorers seeking a standout presentation.

It comes complete with a Bosch Motronic ECU, wiring harness, four-into-two exhaust manifold, and a full set of ancillaries, making it a well-equipped unit for restoration or performance conversion projects.

Technical Specifications

• Engine Code: BMW S14B23

• Displacement: 2.3 liters (2,302 cc)

• Configuration: Inline-four (I4)

• Valvetrain: Dual Overhead Camshafts (DOHC), 16 valves

• Block Material: Cast iron

• Cylinder Head Material: Aluminum alloy

• Induction System: Individual throttle bodies with “BMW M Power” intake plenum

• Fuel Management: Bosch Motronic

• Factory Output (E30 M3 Spec):

  • 192 hp @ 6,750 rpm

  • 170 lb-ft @ 4,750 rpm

Included Components

• BMW S14 2.3L inline-four engine

• Gold crinkle-finished “BMW M Power” valve cover and intake plenum

• Bosch Motronic control module (ECU)

• Complete wiring harness

• Four-into-two exhaust manifold

• Flywheel and clutch assembly

• Alternator

• Distributor

• Power steering pump

• Air conditioning compressor

• Assorted brackets and ancillary hardware

Condition

• Removed from a 1989 E30 M3 approximately one year ago

• Visually complete with key accessories and electrical components included

• Gold-finished top end in excellent visual condition

• Suitable for E30 M3 restoration, period-correct performance build, or collector display

Compatibility

• Direct fit: BMW E30 M3 (1986–1991)

• Potential applications: BMW 2002, E21, or E28 conversions (with modification)

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