Engines Market

BMW X3 35i SPECIALISTS

BMW X3 35i Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK BMW X3 35i engine specialists. Compare prices on reconditioned, rebuilt and used engines for your xDrive35i - powered by the 306hp N55B30 3.0-litre twin-scroll turbo straight-six.

Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
BMW X3 35i Engine
from£2,200 to £6,000
  • Usedfrom £1,800
  • Reconditionedfrom £2,800
  • Common codesN55B30, N55B30A
BMW x3 35i Used Engine — N55B30BMW x3Used Engine — N55B30BMW x3 35i Reconditioned Engine — N55B30BMW x3Reconditioned Engine — N55B30BMW x3 35i Rebuilt Engine — N55B30BMW x3Rebuilt Engine — N55B30

Get your free BMW x3 35i engine quotes

Secure enquiry — no spam, no pressure. Genuine quotes only from vetted UK specialists.

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW X3 35i Engine History & Specs at a Glance

The BMW X3 35i arrived with the F25 generation in 2010 as the performance-oriented petrol flagship, powered by the N55B30 3.0-litre turbocharged straight-six - BMW's first mass-produced single twin-scroll turbo engine. It delivered 306hp and 400Nm of torque, making the X3 35i the quickest petrol X3 of its generation.

BMW X3 35i
  1. 2010

    N55B30, 3.0-litre twin-scroll turbo straight-six petrol, 306hp, launched in the F25 X3 xDrive35i

  2. 2011

    xDrive35i available across SE, Sport and M Sport trims

  3. 2013

    N55B30A updated variant with revised engine management

  4. 2014

    F25 LCI facelift; xDrive35i continues with N55B30A

  5. 2017

    G01 generation launches; xDrive35i replaced by X3 M40i with B58 engine

  6. 2017

    F25 production ends; the 35i badge is discontinued in the X3 range

Every engine fitted to the BMW X3 35i is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

BMW X3 35i Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

N55B30 — 3.0L Twin-Scroll Turbo Petrol (2010-2013) engine

N55B30 — 3.0L Twin-Scroll Turbo Petrol (2010-2013)

Power Output
306hp (225kW) at 5,800rpm
Torque
400Nm (295 lb-ft) at 1,200-5,000rpm
Displacement
2,979cc
Compression Ratio
10.2:1
Years Fitted
2010-2013 (F25 X3 xDrive35i)

Can’t find your exact engine code?-> Get quotes for N55B30 BMW X3 35i engine replacement

-> Get quotes for N55B30 BMW X3 35i engine replacement

Common Problems

BMW X3 35i Engine Problems Repair Cost vs Replacement

The BMW X3 35i's N55 straight-six is BMW's first mass-produced turbocharged petrol engine - responsive, powerful, and generally reliable. However, age and mileage bring well-documented issues with the cooling system, oil leaks, and high-pressure fuel system. Rebuilt BMW X3 35i engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

N55 Electric Water Pump Failure

Affected
BMW X3 35i (N55B30 / N55B30A, 2010-2017)
Typical failure mileage
50,000-80,000 miles
Root cause
The N55 uses an electric water pump that can fail without warning. Unlike belt-driven pumps, there is no gradual deterioration - failure is often sudden, leading to rapid overheating and potential head gasket failure. This is one of the most common N55 engine problems.

Repair options

Repair tierDealer priceSpecialist price
Electric water pump replacement£700-£1,100£450-£800
Full Replacement - rebuilt/reconditioned engine£5,500-£7,500£3,500-£6,000
Our recommendation
On the N55, the electric water pump is a consumable item. Replace it preventatively at 60,000 miles or 8 years - a £450-£800 specialist job is cheap insurance against a £3,500+ engine replacement. Watch for warning signs: overheating warnings, limp mode, or the radiator fan running at maximum speed.
-> Compare rebuilt N55B30 BMW X3 35i engine prices

N55 Oil Leaks

Affected
BMW X3 35i (N55B30 / N55B30A, 2010-2017)
Typical failure mileage
60,000-100,000 miles
Root cause
The N55's plastic valve cover becomes brittle from engine heat, causing gasket failure and oil leaks onto the exhaust manifold. The oil filter housing gasket is also a common leak point. Oil leaks can lead to low oil pressure and, if ignored, engine damage.

Repair options

Repair tierDealer priceSpecialist price
Valve cover gasket replacement£500-£900£350-£600
Oil filter housing gasket replacement£400-£700£250-£450
Full Replacement - rebuilt/reconditioned engine£5,500-£7,500£3,500-£6,000
Our recommendation
Oil leaks on the N55 are almost inevitable with age. A £350-£600 valve cover gasket replacement at a specialist is far cheaper than waiting for oil to damage the wiring or for low oil pressure to destroy the engine. If you smell burning oil or see smoke from the engine bay, have the gaskets inspected immediately.
-> Compare rebuilt N55B30 BMW X3 35i engine prices

N55 HPFP & Injector Failure

Affected
BMW X3 35i (N55B30 / N55B30A, 2010-2017)
Typical failure mileage
50,000-100,000 miles
Root cause
The high-pressure fuel pump (HPFP) can fail, causing hard starts, long cranking, and loss of power. Injector failures are also common, particularly on cylinder 5, leading to rough idling and misfires.

Repair options

Repair tierDealer priceSpecialist price
HPFP replacement£800-£1,400£550-£950
Injector replacement£600-£1,200£400-£800
Full Replacement - rebuilt/reconditioned engine£5,500-£7,500£3,500-£6,000
Our recommendation
If your X3 35i has long cranking times, hard starts, or misfires under load, have the fuel system inspected. HPFP failure is well-documented on the N55. A £550-£950 specialist repair is far cheaper than a full engine replacement. If one injector fails beyond 80,000 miles, consider replacing all six to avoid repeated garage visits.
-> Compare rebuilt N55B30 BMW X3 35i engine prices

N55 Turbocharger & Charge Pipe Issues

Affected
BMW X3 35i (N55B30 / N55B30A, 2010-2017)
Typical failure mileage
60,000+ miles
Root cause
The N55's turbocharger wastegate can develop rattle or fail to close properly. The plastic charge pipe can crack under boost pressure, causing loss of power and boost leaks.

Repair options

Repair tierDealer priceSpecialist price
Charge pipe replacement£400-£700£250-£450
Turbocharger wastegate repair£1,200-£2,000£700-£1,400
Full Replacement - rebuilt/reconditioned engine£5,500-£7,500£3,500-£6,000
Our recommendation
The plastic charge pipe is a known weak point - upgrade to an aluminium replacement preventatively. If you hear a rattling noise from the turbo area or experience loss of boost, have the wastegate inspected. A £250-£450 charge pipe upgrade is excellent value on a performance SUV.
-> Compare rebuilt N55B30 BMW X3 35i engine prices

Don't Let Engine Failure Write Off Your BMW X3 35i

The N55 straight-six is one of BMW's most characterful turbo engines, but electric water pump failure, oil leaks, and fuel system issues can become costly if ignored. Rebuilt engines through EnginesMarket come with upgraded components addressing the original failure points, a minimum 12-month unlimited-mileage warranty, and nationwide delivery or supply-and-fit options. Compare prices from vetted UK specialists today - and keep your X3 35i performing at its best.

Compare BMW X3 35i Engine Replacement Prices Now ->

FAQ

BMW X3 35i Engine ReplacementFrequently Asked Questions

Everything BMW X3 35i owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare BMW X3 35i Engine Prices Today

Comparing quotes for your BMW X3 35i engine replacement is free, quick and carries no obligation. Enter your registration above, tell us your engine code (N55B30 or N55B30A), and receive tailored prices from vetted UK specialists. Whether you need a used, reconditioned or rebuilt unit - with or without fitting - we'll connect you with the right supplier for your exact X3 35i.

1,000+1,000+ BMW X3 engines supplied through our network
12-Month12-Month Warranty on every rebuilt BMW X3 35i engine
NationwideNationwide UK delivery
Get Free BMW X3 35i Engine Quotes ->

Compare quotes from trusted UK BMW X3 35i engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.