X4 Diesel Engines
from £1,400 to £6,500
Rebuilt units from £1,900 · Common codes: N47D20, B47D20, N57D30, B57D30
BMW ENGINE MARKETPLACE
BMW X4 N47/B47/N57 Timing Chain Solutions - UK Specialists
Get quotes from trusted UK BMW X4 engine specialists. Compare reconditioned & used engines for xDrive20d to X4 M - N47/B47/N57 covered. Get a quote before it's too late.
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12-Month Warranty
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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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Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best BMW X4 Replacement Engineto Finding the Best BMW X4 Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
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Most replacements completed within 3-5 days.
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
↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
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Variants We Cover
BMW X4 Engine ReplacementAll Variants Covered
X4 xDrive20d
N47D20 2.0L Diesel
Rebuilt Engines: £1,900-£3,500
X4 xDrive30d
N57D30 3.0L Diesel
Rebuilt Engines: £2,800-£4,500
X4 xDrive20d (LCI)
B47D20 2.0L Diesel
Rebuilt Engines: £2,200-£3,800
X4 xDrive20d
B47D20 2.0L Diesel
Rebuilt Engines: £2,400-£4,200
X4 xDrive30d
B57D30 3.0L Diesel
Rebuilt Engines: £3,000-£5,200
X4 xDrive30i
B48B20 2.0L Petrol
Rebuilt Engines: £2,500-£4,800
X4 xDrive28i
N20B20 2.0L Petrol
Rebuilt Engines: £2,200-£4,000
X4 xDrive35i
N55B30 3.0L Petrol
Rebuilt Engines: £3,200-£5,800
X4 xDrive25e
B48B20 2.0L MHEV
Rebuilt Engines: £3,500-£6,000
Not sure which variant your BMW X4 is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
X4
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.
N47D20 - 2.0L Diesel
Main replacement triggers are timing chain wear, EGR / cooling faults and turbo-control issues.
Compatible variants
xDrive20dxDrive20d xLinexDrive20d M Sport
Avg. rebuilt price
£1,900 - £3,500
Supply only
Technical specifications
- Fuel type
- Diesel
- Engine size
- 2.0L
- Power output
- 184 hp
- Years fitted
- 2014-2018
Common failures
- ●Main replacement triggers are timing chain wear, EGR / cooling faults and turbo-control issues.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which 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.
X4
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...
BMW X4 N47 Timing Chain Failure - Why Early Diesel Engines Fail Prematurely
BMW X4 N47 Timing Chain Failure
Most affected vehicles
BMW X4 xDrive20d (2014-2018F26 chassis
BMW X4 xDrive20d (2014-2018, F26 chassis, N47D20 engine)
Failure mileage range
50,000 - 120,000 miles
Typical failure window
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 | £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 | £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
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.
Compare rebuilt N47D20 engine prices for your BMW X4Replacement 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.
BMW X4 Reconditioned Engines (Recon)£2,200 - £4,800((supply only))
BMW X4 Rebuilt Engines£1,900 - £7,500((supply only))
BMW X4 Used Engines£1,200 - £3,500((supply only))
BMW X4 Remanufactured Engines£2,800 - £6,500((supply only))
BMW X4 Refurbished Engines£1,400 - £3,800((supply only))
Compare BMW X4 engine prices with vetted UK suppliers
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.
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
ϟ
Power output
Verified by registration
△
Common Failure Points
N47 timing chain stretch (50k-120k miles); B47 EGR cooler deposits, DPF clogging in urban use
Production Years: G02 2018-2024, twin-turbo B47 variant
Get quotes for BMW X4 2.0L diesel enginesBMW 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
DieselThe 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 BMW X4 Diesel 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
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
Typical Diesel Models
- •xDrive20d · xDrive25d · xDrive30d · xDrive35d · M40d
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BMW X4 Diesel Engines
DieselThe 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 BMW X4 Diesel 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
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
Typical Diesel Models
- •xDrive20d · xDrive25d · xDrive30d · xDrive35d · M40d
BMW X4 Petrol Engines
PetrolLess common than diesel but growing in replacement enquiries, especially for the B58-powered M40i performance flagship and entry-level xDrive20i/xDrive30i variants across both generations.
Common BMW X4 Petrol Engine Families
- •N20B20 - F26 xDrive20i (181hp) and xDrive28i (241hp), rear timing chain stretch risk
- •N55B30 - F26 xDrive35i and pre-2018 M40i (306-355hp), oil consumption from piston ring carbon
- •B48B20 - G02 xDrive20i (184hp) and xDrive30i (252hp), improved thermal management
Found In
- •F26 X4 (2014-2018) - N20B20, N55B30
- •G02 X4 (2018-2024) - B48B20, B58B30
Known For
- •B58 widely regarded as BMW's most reliable modern straight-six petrol
- •N20 timing chain failures driving replacement decisions on early xDrive20i/xDrive28i
- •B48 coolant loss (expansion tank cap) and integrated PCV failure requiring valve cover replacement
Typical Petrol Models
- •xDrive20i · xDrive28i · xDrive30i · xDrive35i · M40i
BMW X4 Mild Hybrid (MHEV) Engines
MHEVIntroduced on G02 LCI models from 2021, pairing the 2.0-litre B47 diesel or B48 petrol with a 48V starter-generator for electric boost and coasting functionality.
BMW X4 MHEV Engine Codes
- •B47D20 (48V) - 2.0L diesel with 11hp electric boost, xDrive20d MHT
- •B48B20 (48V) - 2.0L petrol with 11hp electric boost (market-dependent)
Found In
- •xDrive20d MHT (G02 LCI, 2021-2024)
Important Notes
- •48-volt starter-generator replaces traditional alternator and starter motor
- •Recovers braking energy to charge a small lithium-ion battery under the boot floor
- •Provides 11hp (8kW) electric assistance under acceleration and enables coasting at speed
1-3 of 4
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 YearsGet quotes for 2014-2015 BMW X4 replacement engines →
BMW X4 Engines by YearWhat Was Fitted & WhenBMW X4 Engines by Year - What 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.
⚙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
▣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
🔧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
Engine Codes Covered:
N47D20B47D20N57D30Not 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.
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