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Jimmy
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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BMW ENGINE MARKETPLACE
BMW X4 Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK BMW X4 engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available.
X4 Diesel Engines - from £1,400 to £6,500
-> Rebuilt units from £1,900 · Common codes: N47D20, B47D20, N57D30, B57D30
X4 Petrol Engines - from £1,500 to £5,500
-> Rebuilt units from £2,200 · Common codes: N20B20, B48B20, N55B30
X4 M Performance Engines - from £3,500 to £9,500
-> Rebuilt units from £4,200 · Common codes: B58B30, B57D30 (M40i, M40d)
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How It Works
3 Simple Stepsto Finding the Best BMW X4 Replacement Engine
Get Instant Quotes from BMW Engine Specialists Across the UK - 100% free, no obligation. Most replacements completed within 3-5 days.
Most replacements completed within 3-5 days.
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
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Live UK Engine Market Data
What Are UK Drivers Paying for BMW X4 Engine Replacement?
The table below shows typical UK rebuilt engine costs across BMW X4 variants, covering documented failure causes, chassis generations, engine codes, and fuel types based on current market data.
Average Market Prices
- BMW X4 (G02) xDrive30i2018-2024£2,500-£4,800Coolant lossB48B20Petrol 2.0L
- BMW X4 (G02) M40i2018-2024£4,500-£8,500PCV diaphragm failB58B30Petrol 3.0L
- BMW X4 (G02) xDrive20i2018-2024£2,200-£4,000Fuel injector failB48B20Petrol 2.0L
- BMW X4 (G02) xDrive25e2020-2024£3,500-£6,000Hybrid battery degradeB48B20MHEV Petrol 2.0L
- BMW X4 (F26) xDrive20d2014-2018£1,900-£3,500Timing chain wearN47D20Diesel 2.0L
- BMW X4 (F26) xDrive20d2014-2018£2,200-£3,800EGR cooler leakB47D20Diesel 2.0L
- BMW X4 (F26) xDrive30d2014-2018£2,800-£4,500EGR cooler failureN57D30Diesel 3.0L
- BMW X4 (F26) xDrive28i2014-2018£2,200-£4,000Timing chain stretchN20B20Petrol 2.0L
- BMW X4 (F26) xDrive35i2014-2018£3,200-£5,800VANOS solenoid failN55B30Petrol 3.0L
- BMW X4 (G02) xDrive20d2018-2024£2,400-£4,200EGR cooler depositB47D20Diesel 2.0L
- BMW X4 (G02) xDrive25d2018-2024£2,600-£4,500DPF cloggingB47D20Diesel 2.0L
- BMW X4 (G02) xDrive30d2018-2024£3,000-£5,200Turbocharger wearB57D30Diesel 3.0L
- BMW X4 (G02) M40d2018-2024£4,200-£7,500Sequential turbo failB57D30Diesel 3.0L
Last updated: 22 May, 14:59
Customer Reviews
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Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Models We Cover
BMW X4 Engine ReplacementAll Variants Covered
From the xDrive20d to the high-performance M40i, our network of UK BMW X4 engine specialists covers every variant. Compare rebuilt, reconditioned and used engine prices across the full range - typical supply-only price for a rebuilt unit with 12-month warranty is £1,900-£8,500, with supply & fit available nationwide.
Core Diesel Range (2014-2018 F26 Generation)
Specs184hp
Years2014-2018
Rebuilt£1,900-£3,500
Core Diesel Range (2018-2024 G02 Generation)
Specs184hp
Years2014-2018
Rebuilt£1,900-£3,500
Core Petrol & Performance Range
Entry & Specialist Variants
Variant Directory
All BMW X4 Variants - Engine Replacement Coverage
A full alphabetical listing of every BMW X4 trim covered by our network. All entries link to a dedicated variant page, where prices are further broken down by engine code, model year, and condition type. Click a live link to compare quotes.
Diesel Variants
xDrive20dxDrive20d M SportxDrive20d xLinexDrive25dxDrive25d M SportxDrive30dxDrive30d M SportxDrive30d xLineM40dM40d M SportxDrive35d
Petrol Variants
xDrive20ixDrive20i M SportxDrive28ixDrive28i M SportxDrive30ixDrive30i M SportxDrive35ixDrive35i M SportM40iM40i M SportHybrid / MHEV VariantsxDrive25exDrive25e M Sport
Engine Codes
BMW X4 Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the BMW X4 across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Diesel Engines
Extracted from detailed diesel engine families across BMW X4 variants.
Petrol Engines
Extracted from detailed petrol and performance engine families across BMW X4 variants.
Hybrid / Electrified Engines
Extracted from electrified powertrains and hybrid engine families used in BMW X4 variants.
Can't find your engine code?
Can't find your engine code? Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK BMW X4 engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Common Problems
BMW X4 Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The BMW X4, particularly early F26 models with the N47 diesel engine, has a well-documented reputation for timing chain failures that can lead to catastrophic engine damage. Later B47 and B58 engines improved reliability but introduced their own issues around EGR coolers, coolant loss, and turbocharger wear on M Performance variants. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Below, we break down the most common X4 engine failures and help you decide whether repair or replacement delivers the best value for your situation.
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. BMW X4 N47 Timing Chain Failure
Why Early Diesel Engines Fail Prematurely
Affected Models
BMW X4 xDrive20d (2014-2018, F26 chassis, N47D20 engine)
Typical Failure Mileage
50,000 - 120,000 miles
Root Cause
The N47 engine's timing chain is positioned at the flywheel side (rear) of the engine. Chain stretch and guide deterioration cause slack, leading to rattling noises and eventual chain failure. When the chain snaps or jumps teeth, valves collide with pistons - requiring a full engine replacement.
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Preventative Timing Chain Replacement - Catch it early Minor | £1,800 - £2,500 | £1,200 - £1,800 | New timing chain, tensioners, guides, and oil pump chain while engine still runs | 60,000+ miles if done before chain stretch causes sprocket wear |
Full Replacement - Rebuilt Engine - After catastrophic failure Best Value | £8,000 - £12,000 | £3,500 - £5,500 | Supply & fit of rebuilt N47D20 engine with upgraded timing chain components, bench tested, 12-month warranty | 100,000+ miles expected; upgraded chain design addresses original flaw |
Our Recommendation
Best next step for bmw x4 n47 timing chain failure
If you hear a rattling noise from the rear of the engine on cold starts, act immediately. A preventative timing chain replacement at a specialist costs £1,200-£1,800 and saves the engine. Once the chain fails, replacement is the only option - a rebuilt engine with upgraded components from a specialist is dramatically cheaper than a dealer-fit new unit (£3,500-£5,500 vs £8,000-£12,000). On a 2014-2018 X4 xDrive20d worth £8,000-£12,000, investing in preventative chain work makes excellent financial sense.
Don't Let Engine Failure Write Off Your BMW X4
From N47 timing chain failures to B58 coolant loss and M40d turbo issues, BMW X4 engines have specific weak points that can lead to costly repairs. EngineMarket connects you with trusted UK BMW X4 specialists who supply rebuilt engines with upgraded components designed to address these original failure points - all backed by a minimum 12-month unlimited mileage warranty. Compare prices across our nationwide network and get back on the road without the main dealer premium.
Compare BMW X4 Engine Replacement Prices Now →BMW X4 Engine Problems
What It Costs to Fix & When Replacement Makes Sense
The BMW X4, particularly early F26 models with the N47 diesel engine, has a well-documented reputation for timing chain failures that can lead to catastrophic engine damage. Later B47 and B58 engines improved reliability but introduced their own issues around EGR coolers, coolant loss, and turbocharger wear on M Performance variants. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty. Below, we break down the most common X4 engine failures and help you decide whether repair or replacement delivers the best value for your situation.
Affected Models
BMW X4 xDrive20d (2014-2018, F26 chassis, N47D20 engine)
Typical Failure Mileage
50,000 - 120,000 miles
Root Cause
The N47 engine's timing chain is positioned at the flywheel side (rear) of the engine. Chain stretch and guide deterioration cause slack, leading to rattling noises and eventual chain failure. When the chain snaps or jumps teeth, valves collide with pistons - requiring a full engine replacement.
Preventative Timing Chain Replacement - Catch it early
Dealer
£1,800 - £2,500
Specialist
£1,200 - £1,800
New timing chain, tensioners, guides, and oil pump chain while engine still runs
60,000+ miles if done before chain stretch causes sprocket wear
Full Replacement - Rebuilt Engine - After catastrophic failure
Dealer
£8,000 - £12,000
Specialist
£3,500 - £5,500
Supply & fit of rebuilt N47D20 engine with upgraded timing chain components, bench tested, 12-month warranty
100,000+ miles expected; upgraded chain design addresses original flaw
Our Recommendation
Best next step for bmw x4 n47 timing chain failure
If you hear a rattling noise from the rear of the engine on cold starts, act immediately. A preventative timing chain replacement at a specialist costs £1,200-£1,800 and saves the engine. Once the chain fails, replacement is the only option - a rebuilt engine with upgraded components from a specialist is dramatically cheaper than a dealer-fit new unit (£3,500-£5,500 vs £8,000-£12,000). On a 2014-2018 X4 xDrive20d worth £8,000-£12,000, investing in preventative chain work makes excellent financial sense.
Don't Let Engine Failure Write Off Your BMW X4
From N47 timing chain failures to B58 coolant loss and M40d turbo issues, BMW X4 engines have specific weak points that can lead to costly repairs. EngineMarket connects you with trusted UK BMW X4 specialists who supply rebuilt engines with upgraded components designed to address these original failure points - all backed by a minimum 12-month unlimited mileage warranty. Compare prices across our nationwide network and get back on the road without the main dealer premium.
Compare BMW X4 Engine Replacement Prices Now →Disclaimer: All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EngineMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific BMW X4 and engine code. Every engine supplied through EngineMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
12-Month Warranty
Upgraded Components
Nationwide UK Delivery
Save vs Main Dealer Price
Replacement Engine Options
BMW X4 Engine TypesOptions, Costs & What to Expect
Every engine type listed below is available through our UK network, with typical price ranges based on your X4's specific variant, engine code and budget.
All engine types include a minimum 12‑month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific BMW X4 within hours.
Engine Sizes
BMW X4 Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the BMW X4 across both generations (F26 2014-2018, G02 2018-2024) is listed below, with compatible engine codes, years and common failure notes.
BMW X4 Diesel Engine Sizes
The 2.0-litre four-cylinder diesel powered the majority of UK X4 sales across both generations, dominating replacement demand. Early F26 models used the N47D20 (184hp), notorious for rear-mounted timing chain failures . From late 2014 onward, the improved B47D20 (188-190hp) introduced revised timing chain architecture and Euro 6 compliance, while G02 models added mild hybrid technology (MHT) from 2021, featuring a 48V starter-generator providing an 11hp boost during acceleration .
| Engine Code(s) | N47D20, B47D20, B47D20A, B47D20B |
| Compatible Models (UK) | xDrive20d (F26 2014-2018, 184hp N47; 2014-2018 190hp B47), xDrive20d (G02 2018-2024, 190hp B47), xDrive20d MHT (G02 LCI 2021-2024, 190hp with 48V mild hybrid), xDrive25d |
| Production Years | G02 2018-2024, twin-turbo B47 variant |
Common Failure Points
Watch for these known weak points
N47 timing chain stretch (50k-120k miles); B47 EGR cooler deposits, DPF clogging in urban use
Not sure which engine size your BMW X4 needs? Enter your registration number above - we'll identify the exact displacement, engine code and compatible replacement options instantly. All engines supplied through EngineMarket include a minimum 12-month unlimited mileage warranty from UK BMW X4 specialists.
BMW X4 Engines Fuel Type
BMW X4 Engines by Fuel Type
Choose your BMW X4 engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the early F26 xDrive20d to the latest G02 M40i.
BMW X4 Diesel Engines
BMW X4 Diesel Engines
The backbone of UK X4 sales across both generations (2014-2024), with the 2.0-litre four-cylinder dominating replacement demand and the 3.0-litre straight-six powering premium xDrive30d and M40d variants.
Common Engine Families
N47D20 - Early F26 xDrive20d (184hp), notorious for rear-mounted timing chain failure
B47D20 - Improved 2.0L unit (190hp) with revised chain design, Euro 6 compliance
N57D30 - F26 xDrive30d/35d straight-six (258-308hp), EGR cooler weakness
B57D30 - G02 xDrive30d (265hp) and M40d sequential turbo (340hp)
Found In
F26 X4 (2014-2018) - N47D20, B47D20, N57D30
G02 X4 (2018-2024) - B47D20, B57D30
G02 LCI (2021-2024) - B47D20 with 48V mild hybrid technology
Known For
Exceptional motorway economy (45-55mpg real-world for 2.0L variants)
N47 timing chain failures between 50,000-120,000 miles - X4's most searched replacement driver
B47 EGR cooler deposits and DPF clogging in urban-only driving
Strong torque delivery suits X4's SUV weight (400Nm+ from 1,750rpm)
Typical Models (UK)
xDrive20d · xDrive25d · xDrive30d · xDrive35d · M40d
Not sure which fuel type your BMW X4 has? Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK BMW X4 specialists.
Engine Years
BMW X4 Engines by YearWhat Was Fitted & When
This technical timeline covers every major engine change across the BMW X4's production run (2014-2025), helping owners identify their exact unit and compare rebuilt engine prices from UK specialists.
2014 - 2015 (F26 Early Production)
Major Engine Change
The first-generation X4 (F26) launched in July 2014 with a diesel-only UK lineup - the N47-powered xDrive20d arrived carrying the rear-mounted timing chain design that would dominate replacement enquiries.
Key Changes
Model launched July 2014 with coupé-SUV styling based on X3 (F25)
UK market initially received diesel engines only
xDrive20d offered with 6-speed manual or 8-speed automatic
xDrive30d and xDrive35d came exclusively with 8-speed ZF automatic
xLine and M Sport trim levels introduced alongside base SE
Known For
N47 timing chain failure risk (rear-mounted chain, 50k-120k miles) - X4's most searched replacement driver
B47 introduced late 2014 with revised timing chain architecture and Euro 6 compliance
Excellent motorway refinement and 45-55mpg real-world economy from 2.0L diesels
F26 platform shared with X3 (F25) but unique rear suspension tuning for sportier handling
Main Engines
N47D20 - 2.0L diesel (xDrive20d, 184hp)
B47D20 - 2.0L diesel (late 2014 onward xDrive20d, 188-190hp)
N57D30 - 3.0L diesel (xDrive30d, 258hp; xDrive35d, 313hp)
Popular Models
BMW X4 xDrive20d SE · BMW X4 xDrive20d xLine · BMW X4 xDrive20d M Sport
BMW X4 xDrive30d M Sport · BMW X4 xDrive35d M Sport
Engine Codes Covered
N47D20B47D20N57D30
Common Replacement Enquiries
BMW X4 xDrive20d engine replacement
N47 timing chain failure fix cost
BMW X4 2014 engine price
Get quotes for 2014-2015 BMW X4 replacement engines
2014 - 2015 (F26 Early Production)
Major Engine Change
The first-generation X4 (F26) launched in July 2014 with a diesel-only UK lineup - the N47-powered xDrive20d arrived carrying the rear-mounted timing chain design that would dominate replacement enquiries.
Key Changes
Model launched July 2014 with coupé-SUV styling based on X3 (F25)
UK market initially received diesel engines only
xDrive20d offered with 6-speed manual or 8-speed automatic
xDrive30d and xDrive35d came exclusively with 8-speed ZF automatic
xLine and M Sport trim levels introduced alongside base SE
Known For
N47 timing chain failure risk (rear-mounted chain, 50k-120k miles) - X4's most searched replacement driver
B47 introduced late 2014 with revised timing chain architecture and Euro 6 compliance
Excellent motorway refinement and 45-55mpg real-world economy from 2.0L diesels
F26 platform shared with X3 (F25) but unique rear suspension tuning for sportier handling
Main Engines
N47D20 - 2.0L diesel (xDrive20d, 184hp)
B47D20 - 2.0L diesel (late 2014 onward xDrive20d, 188-190hp)
N57D30 - 3.0L diesel (xDrive30d, 258hp; xDrive35d, 313hp)
Engine Codes Covered
N47D20B47D20N57D30
Popular Models
BMW X4 xDrive20d SE · BMW X4 xDrive20d xLine · BMW X4 xDrive20d M Sport
BMW X4 xDrive30d M Sport · BMW X4 xDrive35d M Sport
Common Replacement Enquiries
BMW X4 xDrive20d engine replacement
N47 timing chain failure fix cost
BMW X4 2014 engine price
Get quotes for 2014-2015 BMW X4 replacement engines
Year Finder
Not sure which year your BMW X4 was built?
Not sure which year your BMW X4 was built? Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK BMW X4 specialists.
FAQ
BMW X4 Engine ReplacementFrequently Asked Questions
Question 1
How much does a BMW X4 engine replacement cost in the UK?
A rebuilt BMW X4 engine typically costs £1,900-£8,500 supply-only, depending on engine code and variant. Specialist fitting adds £450-£800.
Key points
- • N47/B47 2.0L diesel rebuild: £1,900-£4,200 supply-only
- • B58 3.0L petrol (M40i): £4,500-£8,500 supply-only
- • Specialist fitting nationwide: £450-£800 added to engine price
- • Main dealer replacement can cost 2-3x more than specialist rebuilt units
Question 2
Is the BMW X4 N47 diesel engine reliable? What are the timing chain risks?
The N47 engine has a well-documented timing chain weakness. Chain is rear-mounted and can fail between 50k-120k miles, potentially destroying the engine.
Key points
- • Metallic rattling on cold start is the primary warning sign
- • Chain stretch can cause the engine to jump timing without warning
- • Preventative replacement costs £1,200-£1,800 at a specialist
- • Post-failure engine replacement costs £3,500-£5,500 for a rebuilt unit
Question 3
What are the common problems with BMW X4 B47 diesel engines?
The B47 is significantly more reliable than the N47, with the timing chain moved to the front. However, EGR cooler failures and DPF clogging are the main issues on urban-driven cars.
Key points
- • EGR valve and cooler failures can trigger limp mode and warning lights
- • DPF clogging affects cars used mainly for short journeys without regeneration cycles
- • Turbocharger wear is possible if oil changes are neglected
- • B47 regularly exceeds 120,000 miles without major issues when properly maintained
Question 4
Which BMW X4 petrol engine is most reliable - B48 or N20?
The B48 petrol engine is significantly more reliable than the N20. The N20 has a known rear-mounted timing chain weakness, while the B48 is part of BMW's improved modular engine family.
Key points
- • N20 timing chain stretch affects many pre-2018 X4 xDrive20i and xDrive28i
- • B48 features improved thermal management and closed-deck block design
- • B48 common issues: coolant cap failure and integrated PCV valve failure
- • B48 regularly reaches 150,000+ miles with proper servicing
Question 5
Is the BMW X4 M40i B58 engine reliable for high mileage?
The B58 is widely considered BMW's most reliable modern six-cylinder petrol engine. With proper maintenance, it routinely exceeds 150,000-200,000 miles without major failures.
Key points
- • Closed-deck block design provides exceptional structural strength
- • Common minor issues: coolant cap leaks and VANOS solenoid wear
- • PCV valve integrated into valve cover requires full cover replacement when it fails
- • Well-maintained B58 engines last 300,000+ km before major work is needed
Question 6
Can I fit a used BMW X4 engine instead of a rebuilt one?
Yes, used engines cost £1,200-£3,500 supply-only. However, they offer no warranty on internal condition and may carry the same original failure risks.
Key points
- • Used engines are 40-60% cheaper than rebuilt units upfront
- • No guarantee on timing chain wear, injector health, or turbo condition
- • Rebuilt engines address original failure points with upgraded components
- • All EngineMarket rebuilt engines include 12-month unlimited mileage warranty
Question 7
How long does a BMW X4 engine replacement take with supply and fit?
A specialist can typically complete a BMW X4 engine replacement in 3-5 working days, including delivery of the rebuilt engine and professional fitting.
Key points
- • Engine delivery to your chosen garage takes 1-2 working days
- • Fitting time varies by variant: 2-3 days for 4-cylinder, 3-4 days for 6-cylinder
- • ISN coding and immobiliser matching adds 1 day for ECU synchronisation
- • Most specialists offer courtesy cars or collection/delivery services
Question 8
Does BMW X4 engine replacement include ECU coding and ISN matching?
Professional replacement includes ISN (Individual Serial Number) coding to match the replacement engine to your X4's immobiliser and ECU. Never skip this step.
Key points
- • ISN coding ensures the engine starts and runs with your car's security system
- • Without correct coding, the immobiliser will prevent engine operation
- • All EngineMarket specialists include ISN matching and DDE calibration
- • AdBlue/SCR system recalibration is also performed for diesel X4s
Question 9
What causes a BMW X4 diesel to lose power with a check engine light?
The most common cause is a faulty exhaust back-pressure sensor or throttle valve, which prevents proper DPF regeneration and triggers reduced power mode.
Key points
- • Faulty back-pressure sensor causes DPF regeneration to fail, leading to blockages
- • Throttle valve failure on 2020+ models triggers reduced power and check engine light
- • Sensor replacement typically costs £200-£300 including parts and labour
- • Ignoring the issue can lead to full DPF replacement costing £1,100-£1,800
Question 10
Is it worth replacing the engine on a high-mileage BMW X4?
Yes, if the body and transmission are sound. A £2,500-£5,500 rebuilt engine can add 100,000+ miles to a well-maintained X4 - far cheaper than replacing the whole vehicle.
Key points
- • A 2014-2018 X4 with 120k miles is worth £8,000-£12,000 - replacement makes financial sense
- • Rebuilt engines include upgraded components addressing original failure points
- • Compare to buying another used X4 with unknown engine history
- • Typical rebuilt engine lifespan: 100,000+ miles with proper maintenance
Why Choose Us
Why UK BMW X4 Owners Trust EngineMarket
Join thousands of UK drivers who compare BMW X4 engine prices through our network of trusted specialists - every rebuilt and reconditioned unit backed by a minimum 12‑month unlimited mileage warranty and nationwide delivery.
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Compare engine prices for BMW X4 in the UK and get competitive quotes from garages near you.
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