How much does a BMW X3 28i engine replacement cost in the UK?

A reconditioned N20 engine typically costs £2,800–£4,500 supply only. Fitting adds £900–£1,400. Use our calculator for a figure specific to your car.

Is the BMW X3 28i engine reliable?

The N20 is rated ★★★☆☆. It was named to Wards Top 10 Engines in 2012, but the timing chain guide issue is the defining weakness. Pre-2015 cars are at significant risk; 2015+ cars have updated components. Oil leaks and occasional HPFP issues are also reported.

What are the common problems with the BMW X3 28i?

Timing chain guide failure (especially pre-2015), oil leaks from the valve cover and oil filter housing gaskets, high-pressure fuel pump failure, and turbo wastegate rattle. The timing chain is the most critical - if it fails, the engine is usually scrap.

Is it worth replacing a BMW X3 28i engine, or should I scrap the car?

Depends on vehicle value and build date. Against a well-kept F25 X3 28i worth £5,000–£10,000, a £3,500 recon is 35–70% of the car's value - assess carefully. Post-2015 cars with the updated chain components are more justifiable for replacement.

How do I find my BMW X3 28i engine code?

Listed on the VIN plate and vehicle documentation. The X3 28i uses the N20B20 2.0-litre turbo petrol engine. Tell us your registration date and we'll confirm it for free.

Can I repair the N20 timing chain, or does it need replacement?

Yes - if caught early. A preventative chain and guide replacement (£1,200–£2,500) is far cheaper than a catastrophic chain snap (£2,800–£5,000 engine replacement). At the first sign of cold-start rattle, book an inspection immediately. Post-2015 cars have updated components, but they are not immune to chain wear.

BMW X3 28i2011–2017N20 Turbo Petrol

BMW X3 28i Engine Replacement — Compare Prices & Get Quotes

Get quotes today from trusted UK BMW X3 28i specialists. Compare reconditioned, rebuilt and used N20 engines - supply & fit available nationwide.

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BMW X3 28i Engines - from £1,800 to £5,000Code: N20B20

BMW X3 28i Engines - from £1,800 to £5,000· Code: N20B20

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The X3 28i THROUGH TIME - Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

BMW's turbo four replacing the six‑cylinder - chain guide failure is the defining risk; 2015+ cars have updated chain components.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

F25

2011–2017N20B20★★★☆☆ [NEWLY ASSIGNED - see Data Note]£2,800–£4,500 [PLACEHOLDER - confirm vs cost sheet]BMW's turbo four replacing the six‑cylinder - chain guide failure is the defining risk; 2015+ cars have updated chain components.

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW X3 28i Engine Replacement Costs

Supply Only£2,800–£4,500

Fitted (Indie)£3,700–£5,800

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,800–£3,200£2,600–£4,3001–6 monthsBudget priority; vehicle under £5,000

Reconditioned Engine£2,800–£4,500£3,700–£5,80012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£3,800–£5,000£4,700–£6,30012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£7,000–£10,000£8,500–£12,00024–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting an X3 28i engine typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

Common Problems With BMW 320d Engines

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BMW X3 28i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

BMW X3 28i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseTiming chain guide failure (N20 - pre-2015)✅ Yes£1,200–£2,500If caught early; far cheaper than a new engineValve cover gasket leak (N20)✅ Yes£400–£700Straightforward gasket replacement; catch it earlyOil filter housing gasket leak (N20)✅ Yes£300–£600Preventative - before oil damages the serpentine beltHigh-pressure fuel pump failure (N20)✅ Yes£800–£1,500Specialist replacement; don't let misfires damage the catTurbo wastegate rattle (N20)✅ Yes£500–£1,200Repairable; don't ignore boost issuesSnapped timing chain❌ Usually NoEngine replacementPiston-valve contact means little is left to repair

Buying This X3 28i? Check These First

Buy If

Post-January 2015 build with the updated timing chain guides
Documented timing chain replacement history on pre-2015 cars
Full service history with regular oil changes - the N20 is sensitive to oil quality
Evidence of valve cover and oil filter housing gasket replacements

Avoid If

Pre-2015 car with cold-start rattle and no chain history
Oil leaks with no record of repair - especially from the oil filter housing
Long crank times or hesitation - potential HPFP issues
Poor service history on any generation

Closing Verdict

The X3 28i's N20 engine is a capable turbo four that offers strong performance and efficiency, but the timing chain guide issue is a well-documented risk that can turn a good car into a money pit. Post-2015 cars are safer, but any example needs a documented service history. Buy on chain history, not on price alone.

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Buying Checklist

Before you buy a used BMW X3 28i (or before you commit to an engine replacement), check these:

Cold Start

Listen for any rattle on startup (timing chain guide wear - especially pre-2015)

Service History

Including which engine era (N20 is the only 28i engine - verify this before purchase)

Timing Chain History

Has the chain been replaced? Check for updated components on pre-2015 cars

Oil Leaks

Check for oil spots under the car or a burning oil smell (valve cover or oil filter housing gaskets)

HPFP Health

Long crank times? Hesitation? HPFP issues are a known occasional failure

Turbo Health

Any wastegate rattle or loss of boost?

Engine Warning Light

Have codes been read? Any unresolved timing, fuelling or boost issues?

MOT History

Check for emissions-related failures

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

N20B20

Years2011–2017

Power245 bhp / 350 Nm

2025 Enquiries- (pattern data)

Avg. Recon Cost£2,800–£4,500 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

N20B202011–2017245 bhp / 350 Nm- (pattern data)£2,800–£4,500 [PLACEHOLDER]

Technical Specs

N20B20

Displacement1,997cc

Cylinders4-cylinder inline

Compression Ratio10.0:1

Fuel SystemDirect injection

TurbochargerSingle twin-scroll turbo

ValvetrainDOHC with Double VANOS and Valvetronic

Market Intelligence

Most Common Failure

Timing chain guide failure

60%

of N20 enquiries

[PATTERN DATA]

Average Enquiry Mileage

72,000

miles

[PATTERN DATA]

Average Replacement Cost

£3,500

reconditioned, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

N20B20

[BMW-VERIFIED]

Peak Enquiry Season

Winter

cold starts expose chain issues

[PATTERN DATA]

Regional Demand

South East20%

London18%

Midlands15%

PATTERN DATA

Regional Demand Breakdown

20%South East

18%London

BMW 320d - Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty - always confirm terms with your chosen supplier.

Find the best BMW X3 28i engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

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100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available