BMW 3 Series 316i Engine ReplacementCompare Prices & Get Quotes

A BMW 3 Series 316i engine replacement typically costs between £700 and £5,000 depending on the engine code and condition type. A used N43B16A for the E90 316i starts from around £400, while a fully rebuilt unit with warranty ranges from £2,000-£3,200. The N13 turbo engine for the F30 316i is more expensive - rebuilt units from £3,000-£5,000. Specialist fitting adds £520-£910 in labour.

• Used engines: cheapest option, variable mileage and history
• Reconditioned: mid-range, professionally tested
• Rebuilt: most expensive, includes 12-month warranty

The most common early warning sign is a rattling noise from the engine on cold start - often described as a "rattle" that lasts 1-2 seconds before quietening down. As the chain stretches further, you may notice engine misfires, rough idling, a check engine light, or rattling that persists when the engine is warm. If ignored, the chain can snap, causing catastrophic engine damage.

• Cold-start rattle is the #1 symptom
• Rattling that continues when warm = urgent action needed
• Misfires and check engine light are late-stage warnings

It depends on the value of your car and the extent of the damage. For an E90 316i worth £2,500-£6,000, a rebuilt engine at £2,000-£3,200 is a significant investment - often exceeding the vehicle's value at the lower end. For an F30 316i worth £5,000-£12,000, a rebuilt engine at £3,000-£5,000 may be worthwhile if the rest of the car is in good condition. For older E46 models worth under £3,000, replacement is rarely cost-effective.

• Vehicle under £3,000: strongly consider scrap value
• Vehicle £3,000-£6,000: evaluate both options carefully
• Vehicle over £6,000: rebuilt engine with warranty is often the best long-term value

The 316i and 318i often share the same engine block but with different displacements or tuning. In the E90 generation, the 316i uses the 1.6-litre N43B16A (122hp), while the 318i uses the 2.0-litre N43B20A (143hp). In the E46 generation, the 316i used the 1.6-litre N46B16 or 1.8-litre N42B18, while the 318i used the 2.0-litre N42B20. Always verify compatibility with your specific VIN.

• Different displacements and power outputs
• Check your VIN before ordering a replacement

A BMW 3 Series 316i engine replacement typically takes 2-3 days for a specialist workshop to complete, assuming the replacement engine is already in stock with the supplier. The labour time for the E90 316i (N43) is approximately 8-10 hours, while the F30 316i (N13) is slightly longer at 10-12 hours. Supply-only delivery usually takes 1-3 working days depending on your location.

• Labour: 8-12 hours depending on engine and generation
• Total turnaround: typically 2-3 working days
• Supply-only: 1-3 days delivery

Used engines are taken directly from donor vehicles - they're the cheapest option but come with unknown mileage and history. Reconditioned engines are professionally cleaned, tested, and have worn components replaced - they offer a good balance of cost and reliability. Rebuilt engines are fully stripped, cleaned, machined, and reassembled with new parts including pistons, rings, bearings and gaskets - they're the most expensive but come with a 12-month warranty and are the closest you'll get to a new engine.

• Used: cheapest, unknown history
• Reconditioned: mid-range, tested and refreshed
• Rebuilt: most expensive, fully overhauled with warranty