Question 1

What engines are compatible with the BMW 4 Series 418i Gran Coupé?

Accepted Answer

Main engines for 418i Gran Coupé (F36):• N20B20 (2.0L Turbo, 2013-2018)• B48B20A/B/M0 (2.0L Turbo, 2017-2021)• N55B30 (3.0L TwinPower, 2015-2018)
Exact fit depends on year - chassis code (F36).

Question 2

How much does a BMW 4 Series 418i Gran Coupé engine replacement cost UK?

Accepted Answer

Reconditioned pricing:• £3,000 for N20B20 (2013-2018)• £3,495 for B48B20 variants (2017-2021)• £3,995 for N55B30 (2015-2018)
VAT included with 12-month warranty.

Question 3

What are common BMW 4 Series 418i Gran Coupé engine problems?

Accepted Answer

Key issues by engine:• N20B20: High-pressure fuel pumps, VANOS buildup• B48B20: Oil separators, timing chain tensioners• N55B30: Water pump leaks, VANOS rattle
Most occur between 60k-100k miles.

Question 4

Are reconditioned 4 Series 418i Gran Coupé engines reliable?

Accepted Answer

Yes, when professionally rebuilt:• All worn components replaced to OEM spec• Includes updated parts (e.g., B48 oil separators)• Bench tested - dyno verified• 12-month warranty covers defects.

Question 5

How long does 418i Gran Coupé engine replacement take?

Accepted Answer

Typically 2-4 days:• Diagnostic - removal: 1 day• Engine installation - reconnection: 1 day• Testing - final checks: 1 day
Varies by garage workload - engine type (N20 vs B48).

Question 6

What's included in a 418i Gran Coupé reconditioned engine?

Accepted Answer

Full rebuild includes:• New pistons, rings, gaskets - bearings• Remanufactured turbochargers (where applicable)• Updated components (e.g., B48 oil pumps)• Thorough testing before dispatch.

Question 7

Can I get a warranty on 418i Gran Coupé engine replacement?

Accepted Answer

Yes, all engines via Engine Finders:• Minimum 12-month warranty included• Some suppliers offer 24-month coverage• Covers parts - labor defects• Claims handled directly with supplier.

Question 8

Difference between used and reconditioned 418i Gran Coupé engines?

Accepted Answer

Key differences:• Used: Unknown wear history, no warranty• Reconditioned: Fully rebuilt with new parts• Reconditioned more reliable - cost predictable• Both cheaper than new OEM units.

Question 9

When should I replace my 4 Series 418i Gran Coupé engine?

Accepted Answer

Consider replacement if:• Persistent knocking or unusual noises• Excessive oil consumption or smoke• Loss of power or frequent overheating• Major component failure confirmed.

Question 10

How to find best 418i Gran Coupé engine replacement deal?

Accepted Answer

Use Engine Finders service:• Enter your 4 Series 418i Gran Coupé details• Receive 3-5 instant quotes from UK suppliers• Compare prices, warranties - delivery• Save up to 60% vs main dealer.

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Buy Rebuilt BMW 4 Series 418i Gran Coupé Engines - 12m Warranty with Supply - Fit

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Search your Engine Manually

Enter Your Vehicle Registration To
Find Best Supplier Near You