BMW 3 Series 328i Engine Replacement Compare Prices & Get Quotes

The cost to replace an engine in a BMW 328i varies significantly by generation. For M52B28/M52TUB28 straight-six engines in the E36/E46, rebuilt units range from £3,000-£5,500. For N20B20 turbo four-cylinders in the F30, rebuilt units range from £4,000-£6,500. Used engines start from around £600, while reconditioned units fall in the £1,500-£4,000 bracket. Specialist fitting adds approximately £600-£1,000 in labour.

• Used M52/N20: £600-£2,000
• Reconditioned: £1,500-£4,000
• Rebuilt: £3,000-£6,500
• Labour (supply & fit): £600-£1,000 at specialist rates

The N20 engine in the F30 328i is notorious for timing chain guide failure. The most common early warning sign is a metallic rattling noise from the engine, particularly on cold start or at idle. Other symptoms include a check engine light, reduced performance, and in severe cases, complete engine failure.

• Rattling noise from the front of the engine (cold start)
• Check engine light illumination
• Loss of power or rough running
• Catastrophic failure if ignored - the timing chain can snap

The answer depends entirely on your 328i's generation and condition. For E36/E46 328i models worth £3,000-£8,000, a full engine replacement (£3,000-£5,500) is borderline and only makes sense if the car is in exceptional condition. For F30 328i models worth £6,000-£14,000, replacement is more viable but still requires careful consideration.

• E36/E46 value: £3,000-£8,000
• F30 value: £6,000-£14,000
• Full rebuilt engine: £3,000-£6,500
• Timing chain guide replacement: £1,200-£2,000 (best value repair on N20)
• Cooling system overhaul: £350-£650 (best value preventative maintenance)
• Evaluate scrap value if replacement cost exceeds 60% of vehicle value

The M52B28 (1995-1998) features single-VANOS on the intake camshaft and an aluminium block with Nikasil cylinder lining. The M52TUB28 (1998-2000) introduced Double-VANOS (on both intake and exhaust camshafts), cast-iron cylinder liners for improved durability, and revised camshafts.

• M52B28: Single-VANOS, Nikasil liners, 190 hp
• M52TUB28: Double-VANOS, cast-iron liners, 193 hp
• Both: 2.8L straight-six, 280 Nm torque

A full engine replacement on a BMW 328i typically takes 1-2 days for a specialist workshop, assuming the replacement engine is on hand. E36/E46 M52 straight-six swaps are well-understood by BMW specialists, while F30 N20 swaps require additional expertise due to the turbocharged architecture.

• Supply-only delivery: 1-3 working days (nationwide)
• Supply & fit: 1-2 days at the workshop
• Always confirm lead time with your chosen specialist

Yes. While the M52B28, M52TUB28, and N20B20 are no longer in production, used, reconditioned, and rebuilt units remain readily available through UK engine specialists. EnginesMarket connects you with vetted suppliers who stock engines for all 328i generations - from the E36 through to the F30.

• Used M52/N20 engines: widely available from £600
• Reconditioned units: available from £1,500
• Rebuilt units: available from £3,000 with 12-month warranty
• All options available with supply & fit