BMW X5 35i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW X5 35i engine specialists. Compare prices on reconditioned, rebuilt and used N55B30 engines - supply & fit available across the UK.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £2,800 to £4,800
Used from £1,200 · Reconditioned from £2,800 · Common codes: N55B30, N55B30A, N55B30M0
From £1,200
Tested, bare/short engine
From £2,800
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best BMW X5 35i Replacement Engineto Finding the Best BMW X5 35i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW X5 35i - Engine History & Specs at a Glance
The BMW X5 35i was introduced with the E70 facelift in 2010, replacing the naturally aspirated 3.0-litre straight-six petrol engine. It was the first X5 petrol to feature BMW's N55 turbocharged inline-six - the brand's first six-cylinder engine to combine turbocharging, direct fuel injection and Valvetronic. The 35i continued into the F15 generation, available in both rear-wheel drive sDrive and all-wheel drive xDrive forms, until it was phased out in favour of the B58-powered 40i.
Variant HistoryBMW X5 35i - Engine History & Specs at a Glance
The BMW X5 35i was introduced with the E70 facelift in 2010, replacing the naturally aspirated 3.0-litre straight-six petrol engine. It was the first X5 petrol to feature BMW's N55 turbocharged inline-six - the brand's first six-cylinder engine to combine turbocharging, direct fuel injection and Valvetronic. The 35i continued into the F15 generation, available in both rear-wheel drive sDrive and all-wheel drive xDrive forms, until it was phased out in favour of the B58-powered 40i.
BMW X5 35i
Fuel TypePetrol
Engine Size Range3.0L
Power Output Range306hp (225kW) across the variant's historyEngine History Timeline
N55B30 introduced with E70 LCI (facelift) 3.0L turbocharged straight-six, 306hp, 8-speed automatic transmission
F15 generation launches; 35i continues with N55B30 now available as sDrive35i (RWD) and xDrive35i (AWD)
2018 - N55B30 remains the sole petrol six-cylinder option in the X5 35i producing 306hp and 400Nm torque
F15 production ends; G05 generation replaces the 35i with the B58-powered 40i
Key Specs Snapshot
Fuel TypePetrolEngine Size Range3.0LPower Output Range306hp (225kW) across the variant's historyYears Produced2010-2018Every engine fitted to the BMW X5 35i is covered below, with UK rebuilt pricing and known failure points - from the E70 launch to the final F15 examples.
BMW X5 35i Engine Codes - Specifications & Replacement CostBMW X5 35i Engine Codes - Specifications & Replacement Cost
3.0L Turbo Petrol (2010-2018)
Power Output306hp (225kW)Years Fitted2010-2018
Compatible Trim Levels
- sDrive35i (F15, rear-wheel drive)
- xDrive35i (E70 LCI, F15, all-wheel drive)
- xDrive35i M Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,200-£2,800
Reconditioned
Addressed known issues, tested
£2,800-£4,200
Rebuilt
Full teardown, upgraded internals
£3,800-£4,800
Common Failure
The N55 engine is known for High-Pressure Fuel Pump (HPFP) failure, which can cause hard starting, engine stalling and loss of power. Valve cover gasket leaks are also common, leading to burning oil smells and potential misfires if oil reaches the spark plugs. Timing chain tensioner wear can occur on higher-mileage units, producing a rattling noise on startup.
The BMW X5 35i is powered by the N55 turbocharged straight-six petrol engine - BMW's first turbocharged six-cylinder to combine forced induction with direct injection and Valvetronic. While the N55 is generally more reliable than its predecessor (the twin-turbo N54), it has well-documented weak points that can lead to expensive repairs. Below we break down the most common N55 failures on the X5 35i, what you'll pay at a dealer versus a specialist, and when replacement is the only sensible answer. Every rebuilt N55 engine supplied through EnginesMarket includes upgraded components designed to address the original failure point - plus a minimum 12-month unlimited mileage warranty.
Why the BMW X5 35i N55 Engine Stalls or Won't Start
Affected Vehicles
BMW X5 35i (N55B30, 2010-2018)
Typical Failure Mileage
50,000-80,000 miles
Root Cause
The High-Pressure Fuel Pump is a known weak point on the N55 engine. A failing HPFP can lead to hard starting, long cranking times, engine stalling, loss of power, and in some cases, the engine may not start at all. Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
Why It Happens
The High-Pressure Fuel Pump is a known weak point on the N55 engine. A failing HPFP can lead to hard starting, long cranking times, engine stalling, loss of power, and in some cases, the engine may not start at all. Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
Dealer (parts + labour)
£1,000-£1,600
Specialist (parts + labour)
£550-£1,000
What it involves
Replace high-pressure fuel pump with rebuilt or OEM unit, fuel system flush
Suitability
Viable if caught early; prevents stalling and further damage
1 - 2 daysDealer (parts + labour)
£6,000-£9,000
Specialist (parts + labour)
£3,800-£4,800
What it involves
Supply & fit rebuilt N55B30 with new HPFP and upgraded components, bench tested, 12-month warranty
Suitability
Required if HPFP failure caused injector or engine damage
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 |
|---|---|---|---|---|---|
 Minor - HPFP Replacement Minor | £1,000-£1,600 | £550-£1,000 | Replace high-pressure fuel pump with rebuilt or OEM unit, fuel system flush | Viable if caught early; prevents stalling and further damage | 1 - 2 days |
 Full Replacement - Rebuilt/Reconditioned Engine Best Value | £6,000-£9,000 | £3,800-£4,800 | Supply & fit rebuilt N55B30 with new HPFP and upgraded components, bench tested, 12-month warranty | Required if HPFP failure caused injector or engine damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical BMW X5 35i (E70 or F15) in fair condition is worth £6,000-£18,000 depending on age, mileage and specification. An HPFP replacement at specialist rates (£550-£1,000) is excellent value on any X5 35i worth over £6,000. If the engine has suffered internal damage from fuel starvation, evaluate the cost of a full rebuild against the vehicle's value - for a well-maintained example, a rebuilt N55 with warranty is a sound investment.
Our Recommendation
Our Recommendation
HPFP failure on the N55 gives clear warning signs - long cranking, rough idle, and hesitation under load. Address it immediately. A specialist HPFP replacement costs under £1,000 and prevents the pump from failing completely and leaving you stranded. On any X5 35i approaching 60,000 miles, consider preventative HPFP inspection or replacement - it's cheaper than a tow truck and a full engine rebuild.
Don't Let Engine Failure Write Off Your BMW X5 35i
A failed N55 engine doesn't have to mean the end of the road for your X5 35i. Whether you're facing HPFP failure, valve cover gasket leaks, timing chain issues, or any other catastrophic problem, EnginesMarket connects you with trusted UK BMW X5 35i specialists who supply rebuilt N55 engines with upgraded components specifically designed to address the original failure point. Every engine comes with a minimum 12-month unlimited mileage warranty, nationwide delivery, and supply & fit options across the UK. Compare prices today - and get your X5 35i back on the road without paying the main dealer premium.
Compare rebuilt N55B30 BMW X5 35i 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 X5 35i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
BMW X5 35i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW X5 35i engine replacement cost in the UK-
A full BMW X5 35i engine replacement typically costs £2,800-£4,800 supply-only for rebuilt N55B30 units, or £4,500-£6,500 fitted by a specialist.
- N55B30 rebuilt supply-only: £3,800-£4,800 depending on mileage and condition
- Used N55B30 engines: £1,200-£2,800
- Professional fitting adds £800-£1,500 to any engine purchase
Question 2Is the BMW X5 35i N55 engine reliable-
The N55 is generally more reliable than its twin-turbo predecessor, the N54. However, it has well-documented weak points: High-Pressure Fuel Pump (HPFP) failure is common between 50,000-80,000 miles, valve cover gasket leaks are frequent from 60,000 miles, and timing chain tensioner wear can occur on higher-mileage units. With proactive maintenance, the N55 is a durable and enjoyable engine.
-> Find a reconditioned BMW X5 35i N55B30 engineQuestion 3What are the signs of HPFP failure on a BMW X5 35i-
The most common signs are long cranking times before the engine starts, rough idling, hesitation or stumbling under acceleration, loss of power, and the Check Engine Light illuminating. In extreme cases, the engine may stall while driving or fail to start at all. If you notice any of these symptoms on your X5 35i, have the HPFP inspected immediately.
-> Compare rebuilt N55B30 BMW X5 35i engine pricesQuestion 4Does the BMW X5 35i have timing chain problems-
The N55 engine is not as prone to catastrophic timing chain failure as the N47 diesel, but timing chain tensioner wear is a known issue on higher-mileage units. Symptoms include a rattling or slapping noise from the engine, especially during cold start-up. If you hear this noise, have the tensioner inspected - replacement is far cheaper than a full engine rebuild.
-> Get quotes for N55B30 timing chain repair for BMW X5 35iQuestion 5Is it worth replacing the engine on a high-mileage BMW X5 35i-
For an X5 35i (E70 or F15) worth £6,000-£18,000, a £2,800-£4,800 rebuilt N55 engine can make financial sense if the body, gearbox and interior are sound. The N55 is a well-supported engine with good parts availability. Always factor the 12-month warranty into your replacement decision - a rebuilt engine with warranty offers peace of mind that a high-mileage used unit cannot match.
-> Check BMW X5 35i engine replacement value for your specific model yearQuestion 6What is the difference between the BMW X5 sDrive35i and xDrive35i-
The sDrive35i is rear-wheel drive only (available on the F15 generation), while the xDrive35i is all-wheel drive. Both use the same N55B30 engine with the same power output (306hp). The drivetrain difference affects handling and fuel economy but does not change the engine itself. When ordering a replacement engine, the same N55B30 unit fits both sDrive and xDrive variants - though fitting labour may differ slightly due to drivetrain component access.
-> Find a code-matched BMW X5 35i replacement engine - enter your reg aboveWhy Choose UsCompare BMW X5 35iEngine PricesToday
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Comparing quotes for your BMW X5 35i engine replacement is completely free and carries no obligation. Enter your registration above, tell us your N55B30 engine code, and we'll connect you with trusted UK specialists who can supply or supply & fit the right engine for your X5 35i - whether you have an E70 or F15 generation, sDrive or xDrive. All backed by a minimum 12-month unlimited mileage warranty.
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