BMW X4 xDrive20i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW X4 xDrive20i engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available across the full F26 and G02 xDrive20i range.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £2,200 to £4,200
Used from £1,500 · Reconditioned from £2,200 · Common codes: N20B20 (F26), B48B20 (G02)
From £1,500
Tested, bare/short engine
From £2,200
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK BMW X4 xDrive20i specialists.
3 Simple Steps3 Simple Stepsto Finding the Best BMW X4 xDrive20i Replacement Engineto Finding the Best BMW X4 xDrive20i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW X4 xDrive20i - Engine History & Specs at a Glance
The BMW X4 xDrive20i arrived as the entry-level petrol variant in the first-generation F26 X4 range, offering a turbocharged 2.0-litre four-cylinder with xDrive all-wheel drive. The second-generation G02 model replaced the N20 engine with the improved B48 unit.
Variant HistoryBMW X4 xDrive20i - Engine History & Specs at a Glance
The BMW X4 xDrive20i arrived as the entry-level petrol variant in the first-generation F26 X4 range, offering a turbocharged 2.0-litre four-cylinder with xDrive all-wheel drive. The second-generation G02 model replaced the N20 engine with the improved B48 unit.
BMW X4 xDrive20i
Fuel TypePetrol
Engine Size2.0L (1,997cc N20, 1,998cc B48)
Power Output184hp (both N20B20 and B48B20)Engine History Timeline
N20B20 2.0L turbo petrol, 184hp, F26 generation launch
B48B20 2.0L turbo petrol, 184hp, G02 generation launch
B48B20 with 48V mild hybrid 184hp + 11hp electric boost, G02 LCI facelift
End of X4 production; G02 xDrive20i remains available until model run-out
Key Specs Snapshot
Fuel TypePetrolEngine Size2.0L (1,997cc N20, 1,998cc B48)Power Output184hp (both N20B20 and B48B20)Years Produced2014-2025 (F26 2014-2018, G02 2018-2025)Every engine fitted to the BMW X4 xDrive20i is covered below, with UK rebuilt pricing, known failure points, and compatibility notes for F26 and G02 generations.
BMW X4 xDrive20i Engine Codes - Specifications & Replacement CostBMW X4 xDrive20i Engine Codes - Specifications & Replacement Cost
2.0L Turbo Petrol (2014-2018)
Power Output184hpYears Fitted2014-2018 (F26 first generation)
Compatible Trim Levels
- xDrive20i
- xDrive20i M Sport
- xDrive20i xLine
- xDrive20i X Design
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,800 `[ESTIMATED - using B48B20 as proxy]`
Reconditioned
Addressed known issues, tested
£2,200-£4,000 `[ESTIMATED - using B48B20 as proxy]`
Rebuilt
Full teardown, upgraded internals
£3,200-£5,000 `[ESTIMATED - using B48B20 as proxy]`
Common Failure
The N20 engine has a known timing chain stretch and guide failure risk - chain is positioned at the rear of the engine and can fail between 50,000-100,000 miles. Valve cover gasket oil leaks are also common from 30,000-40,000 miles.
The BMW X4 xDrive20i's petrol engine story is one of two generations. Early F26 models with the N20B20 have a well-documented reputation for timing chain failures that can lead to catastrophic engine damage. Later G02 models with the B48B20 are significantly more reliable but introduced their own issues around coolant loss, PCV valve failure, and - on LCI models - mild hybrid system complexity. Every rebuilt engine supplied through EnginesMarket includes upgraded components designed to address the original failure point, plus a minimum 12-month unlimited mileage warranty. Below, we break down the most common X4 xDrive20i engine failures and help you decide whether repair or replacement delivers the best value.
Why Early Petrol Engines Fail Prematurely
Affected Vehicles
BMW X4 xDrive20i (F26, N20B20, 2014-2018)
Typical Failure Mileage
50,000-100,000 miles
Root Cause
The N20 engine's timing chain is positioned at the rear (flywheel side) 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.
Why It Happens
The N20 engine's timing chain is positioned at the rear (flywheel side) 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.
Dealer (parts + labour)
£1,800-£2,500
Specialist (parts + labour)
£1,200-£1,800
What it involves
New timing chain, tensioners, guides, and oil pump chain
Suitability
60,000+ miles if done before chain stretch causes sprocket wear
1 - 2 daysDealer (parts + labour)
£7,000-£10,000
Specialist (parts + labour)
£3,200-£5,000
What it involves
Supply & fit of rebuilt N20B20 engine with upgraded timing components, 12-month warranty
Suitability
Full restoration; upgraded components address original weakness
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 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 | 60,000+ miles if done before chain stretch causes sprocket wear | 1 - 2 days |
 Full Replacement - rebuilt engine Best Value | £7,000-£10,000 | £3,200-£5,000 | Supply & fit of rebuilt N20B20 engine with upgraded timing components, 12-month warranty | Full restoration; upgraded components address original weakness | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A 2014-2018 BMW X4 xDrive20i is typically worth £8,000-£15,000 on the UK used market `[THIRD-PARTY]`. For a vehicle in this value band, a rebuilt engine at £3,200-£5,000 represents 30-50% of the car's value - financially viable, especially if the vehicle is in good condition and kept for 2+ years.
Our Recommendation
Our Recommendation
If you hear a rattling noise from the rear of the engine on cold starts, act immediately. 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 from a specialist is dramatically cheaper than a dealer-fit new unit.
Don't Let Engine Failure Write Off Your BMW X4 xDrive20i
"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 EnginesMarket'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 xDrive20i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Compare rebuilt N20B20 BMW X4 xDrive20i engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"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 EnginesMarket'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 xDrive20i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW X4 xDrive20i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW X4 xDrive20i engine replacement cost in the UK-
A rebuilt BMW X4 xDrive20i engine typically costs £2,200-£5,000 supply-only, depending on engine code (N20B20 or B48B20) and condition type (reconditioned or rebuilt). Specialist fitting adds £450-£800.
- B48B20 rebuilt supply-only: £3,200-£5,000 `[EM-QUOTE]`
- N20B20 rebuilt supply-only: £3,200-£5,000 `[ESTIMATED]`
- 48V MHEV B48B20 supply-only: £3,800-£6,000 `[ESTIMATED]`
- Specialist fitting nationwide: £450-£800 added to engine price
Question 2What are the signs of N20 timing chain failure in a BMW X4 xDrive20i-
The N20 engine has a rear-mounted timing chain that can stretch and fail - a metallic rattling noise on cold start is the primary warning sign. Chain stretch can cause the engine to jump timing without warning.
- Metallic rattle from the rear of the engine on cold start
- Rattling that diminishes as the engine warms up
- Engine warning light or reduced power
- Preventative replacement costs £1,200-£1,800 at a specialist
- Post-failure engine replacement costs £3,200-£5,000 for a rebuilt unit
Question 3Is the BMW X4 xDrive20i B48 petrol engine reliable-
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 and regularly reaches 150,000+ miles with proper servicing.
- B48 features improved thermal management and closed-deck block design
- Common issues: coolant cap failure and integrated PCV valve failure
- B48 MHEV adds 48V system complexity requiring specialist handling
- B48 is widely considered one of BMW's most reliable four-cylinder petrol engines
Question 4What's the difference between the X4 xDrive20i and xDrive20d engines-
The xDrive20i is a 2.0-litre turbo petrol engine producing 184hp, while the xDrive20d is a 2.0-litre turbo diesel producing 184-190hp. The diesel delivers significantly more torque (400Nm vs 270-300Nm) and better fuel economy but carries higher emissions system complexity (DPF, AdBlue, EGR).
- xDrive20i: petrol, 184hp, 270-300Nm torque, simpler emissions system
- xDrive20d: diesel, 184-190hp, 400Nm torque, EGR/DPF/AdBlue complexity
- Replacement costs similar (£2,200-£5,000 supply-only for both)
- The diesel is more common in the UK market but has more known failure points
Question 5How long does a BMW X4 xDrive20i engine replacement take with supply and fit-
A specialist can typically complete a BMW X4 xDrive20i engine replacement in 3-5 working days, including delivery of the rebuilt engine and professional fitting.
- Engine delivery to your chosen garage takes 1-2 working days
- Fitting time: 2-3 days for 4-cylinder engine
- ISN coding and immobiliser matching adds 1 day for ECU synchronisation
- Most specialists offer courtesy cars or collection/delivery services
Question 6Is it worth replacing the engine on a high-mileage BMW X4 xDrive20i-
Yes, if the body and transmission are sound. A £2,200-£5,000 rebuilt engine can add 100,000+ miles to a well-maintained X4 - far cheaper than replacing the whole vehicle.
- A 2014-2018 X4 xDrive20i with 100k+ miles is worth £8,000-£15,000 - replacement makes financial sense
- Rebuilt engines include upgraded components addressing original failure points
- B48-equipped G02 models have higher retained value, making replacement even more viable
- Compare to buying another used X4 with unknown engine history
- Typical rebuilt engine lifespan: 100,000+ miles with proper maintenance
Why Choose UsCompare BMW X4 xDrive20iEngine PricesToday
100+ BMW X4 xDrive20i engines supplied through our network
12-Month Warranty on every rebuilt X4 xDrive20i engine
Nationwide UK delivery
supply & fit available
Comparing quotes for your BMW X4 xDrive20i engine replacement is completely free and carries no obligation. Simply enter your registration, choose from vetted UK specialists, and get back on the road with the confidence of a 12-month unlimited mileage warranty. Whether you need an N20B20 for your F26 or a B48B20 for your G02, our network has the right engine at the right price.
Enter your registration
and get matched with verified BMW X4 xDrive20i specialists.