BMW X3 28i2011–2017N20 Turbo Petrol

BMW X3 28i Engine Replacement —Compare Prices &
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Name: BMW X3 28i UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

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

Supply &Fit Available
12-MonthWarranty
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Supply &Fit Available
12-MonthWarranty
NationwideDelivery
20+Specialists

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

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Reconditioned
Rebuilt
Used
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Instant Quotes
No Obligation
100% Free
Reconditioned
Rebuilt
Used
Supply & Fit Available
UK-Wide Network

The X3 28i Through Time — Era Map

One generation. One era. 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.

Generation	Years	Engine Code	Reliability	Recon Cost (Guide)	Era Note
F25	2011–2017	N20B20		£2,800–£4,500[PLACEHOLDER]	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 UKCost Data
VerifiedReliability
ExpertInsights
Updated for2025

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 Type	Supply Only	Fitted (Indie)	Warranty	Best For
Used Engine	£1,800 – £3,200	£2,600 – £4,300	1–6 months	Budget priority; vehicle under £5,000
Reconditioned Engine	£2,800 – £4,500	£3,700 – £5,800	12–24 months	Most owners — best cost/warranty balance
Rebuilt Engine	£3,800 – £5,000	£4,700 – £6,300	12–24 months	Long-term ownership; 3+ year horizon
Main Dealer New	£7,000 – £10,000	£8,500 – £12,000	24–36 months	Insurance 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).

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20+ vetted BMW specialists, every X3 28i variant covered, with a 12-month warranty as standard.

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X3 28i — Repair, Buy, or Replace?

Not every issue means a new engine.Here’s what can be repaired, when it makes sense, and what to check before you buy.

Can It Be Repaired?

Problem	Repairable?	Typical Cost	When It Makes Sense
Timing chain guide failure (N20 — pre-2015)	Yes	£1,200 – £2,500	If caught early; far cheaper than a new engine
Valve cover gasket leak (N20)	Yes	£400 – £700	Straightforward gasket replacement; catch it early
Oil filter housing gasket leak (N20)	Yes	£300 – £600	Preventative — before oil damages the serpentine belt
High-pressure fuel pump failure (N20)	Yes	£800 – £1,500	Specialist replacement; don't let misfires damage the cat
Turbo wastegate rattle (N20)	Yes	£500 – £1,200	Repairable; don't ignore boost issues
Snapped timing chain	Usually No	Engine replacement	Piston-valve contact means little is left to repair

ProblemRepairable? · Typical Cost

Timing chain guide failure (N20 — pre-2015)

Yes£1,200 – £2,500

If caught early; far cheaper than a new engine

Valve cover gasket leak (N20)

Yes£400 – £700

Straightforward gasket replacement; catch it early

Oil filter housing gasket leak (N20)

Yes£300 – £600

Preventative — before oil damages the serpentine belt

High-pressure fuel pump failure (N20)

Yes£800 – £1,500

Specialist replacement; don't let misfires damage the cat

Turbo wastegate rattle (N20)

Yes£500 – £1,200

Repairable; don't ignore boost issues

Snapped timing chain

Usually NoEngine replacement

Piston-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:

1. Cold Start
Listen for any rattle on startup (timing chain guide wear — especially pre-2015)
2. Service History
Including which engine era (N20 is the only 28i engine — verify this before purchase)
3. Timing Chain History
Has the chain been replaced? Check for updated components on pre-2015 cars
4. Oil Leaks
Check for oil spots under the car or a burning oil smell (valve cover or oil filter housing gaskets)
5. HPFP Health
Long crank times? Hesitation? HPFP issues are a known occasional failure
6. Turbo Health
Any wastegate rattle or loss of boost?
7. Engine Warning Light
Have codes been read? Any unresolved timing, fuelling or boost issues?
8. MOT History
Check for emissions-related failures

Why this matters

A 10-minute check now can save you thousands later. The right X3 28i is a superb long-term car — the wrong one can be expensive fast.

Buying Checklist

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

1
Cold Start
Listen for any rattle on startup (timing chain guide wear — especially pre-2015)
2
Service History
Including which engine era (N20 is the only 28i engine — verify this before purchase)
3
Timing Chain History
Has the chain been replaced? Check for updated components on pre-2015 cars
4
Oil Leaks
Check for oil spots under the car or a burning oil smell (valve cover or oil filter housing gaskets)
5
HPFP Health
Long crank times? Hesitation? HPFP issues are a known occasional failure
6
Turbo Health
Any wastegate rattle or loss of boost?
7
Engine Warning Light
Have codes been read? Any unresolved timing, fuelling or boost issues?
8
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 X3 28i pitfalls.

Engine Codes

N20B20

Years: 2011–2017
Power: 245 bhp / 350 Nm
2025 Enquiries: —(pattern data)
Avg. Recon Cost: £2,800–£4,500[PLACEHOLDER]

Engine Code	Years	Power	2025 Enquiries	Avg. Recon Cost
N20B20	2011–2017	245 bhp / 350 Nm	—(pattern data)	£2,800–£4,500[PLACEHOLDER]

Technical SpecsN20B20

Displacement: 1,997cc
Cylinders: 4-cylinder inline
Compression Ratio: 10.0:1
Fuel System: Direct injection
Turbocharger: Single twin-scroll turbo
Valvetrain: DOHC with Double VANOS and Valvetronic

Market Intelligence

Real data from thousands of X3 28i enquiries in 2025.

Most Common FailureTiming 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]

Most Requested Engine Code

N20B20

[BMW-VERIFIED]

Peak Enquiry Season

Winter

Cold starts expose chain issues

[PATTERN DATA]

Regional Demand

South East: 20%
London: 18%
Midlands: 15%
Other Regions: 47%

[PATTERN DATA]

Regional Demand Breakdown

18%London20%South East15%Midlands47%Other Regions

Frequently Asked Questions

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.

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.

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.

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. Always assess the rest of the car before committing.

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.

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.

Disclaimer: 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.