How much does a BMW 3 Series 330i engine replacement cost in the UK-

A BMW 3 Series 330i engine replacement typically costs between £1,500 and £6,500 supply-only, depending on the engine code and condition type. Used engines: £600-£3,000 (M54/N52/N53) to £1,500-£3,000 (N55/B48). Reconditioned engines: £1,800-£5,000. Rebuilt engines: £2,800-£6,500 with 12-month warranty. Supply and fit adds approximately £650-£1,200 in labour depending on the generation.

What are the signs of timing chain failure in a BMW 3 Series 330i-

On B48 and N-series 330i engines, the key warning signs are: a rattling or clacking noise from the front of the engine on cold start, a whining noise that increases with engine RPM, rough idle or misfires, and engine management light with timing-related fault codes. If you hear any of these, get the car inspected immediately - catching it early can save your engine.

Is it worth replacing the engine in a BMW 3 Series 330i-

It depends on the age and value of your car. E46 330i (worth £3,000-£8,000): repair if possible; full rebuild only if the car is exceptional. E90 330i (worth £3,000-£10,000): timing chain repair or used engine often makes sense. F30 330i (worth £6,000-£16,000): rebuilt engine with warranty is usually a sound investment. G20 330i (worth £15,000-£35,000): replacement cost is small relative to vehicle value. Always compare the cost of replacement against your car's current market value before deciding.

What's the difference between the BMW 330i and 340i engines-

The 330i and 340i are different engine families entirely. 330i (F30/G20): B48 2.0-litre four-cylinder turbo, 252-258 hp. 340i (F30/G20): B58 3.0-litre straight-six turbo, 320-382 hp. The 340i uses the larger six-cylinder B58 engine - more power, more torque, but higher running costs and a more expensive replacement.

How long does a BMW 3 Series 330i engine replacement take-

A typical BMW 3 Series 330i engine replacement takes 2-5 working days. E46/E90 (M54/N52/N53): 10-14 hours labour - around 2-3 days. F30/G20 (N55/B48): 8-12 hours labour - around 2-3 days. Supply-only engines can be delivered nationwide within 1-2 working days. Full supply & fit typically adds 1-2 days for booking and workshop scheduling.

Does a rebuilt BMW 3 Series 330i engine come with a warranty-

Yes. Every rebuilt BMW 3 Series 330i engine supplied through EnginesMarket comes with a minimum 12-month unlimited-mileage warranty as standard. The warranty covers manufacturing defects and parts failure. Upgraded components address the original failure points (e.g. improved timing chain guides on B48). Always confirm exact warranty terms with your chosen supplier.

BMW 330i SPECIALISTS

BMW 3 Series 330i Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK BMW 3 Series 330i engine specialists. Compare prices on reconditioned, rebuilt and used engines for every 330i generation - from the E46 M54 straight-six to the G20 B48 turbo-four.

Supply & Fit Available

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BMW 3 Series 330i Engine

from£3,000 to £5,500

Usedfrom £1,500
Reconditionedfrom £2,800
Common codesM54B30, N52B30, N53B30

BMW 3-seriesUsed Engine — M54B30

BMW 3-series 330i Reconditioned Engine — M54B30

BMW 3-seriesReconditioned Engine — M54B30

BMW 3-series 330i Rebuilt Engine — M54B30

BMW 3-seriesRebuilt Engine — M54B30

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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 3 Series 330i Engine History & Specs at a Glance

The BMW 330i has been the performance benchmark of the 3 Series petrol range since its debut in the E46 generation. Over four generations, the 330i badge has moved from a naturally aspirated 3.0-litre straight-six (M54) to the high-output N52, the direct-injection N53, the turbocharged N55, and finally the modular B48 turbo-four - each iteration delivering more power, efficiency and refinement than the last.

2000
M54B30, 3.0-litre straight-six (231 hp) - E46 generation, naturally aspirated
2005
N52B30, 3.0-litre straight-six (258 hp) - E90/E91/E92/E93 generation, magnesium-aluminium composite block
2007
N53B30, 3.0-litre straight-six (268 hp) - E90 LCI/E92/E93, direct injection
2012
N55B30, 3.0-litre straight-six turbo (306 hp) - F30 generation, TwinPower Turbo
2016
B48B20O0, 2.0-litre four-cylinder turbo (252 hp) - F30 LCI, modular engine family
2019
B48B20O1, 2.0-litre four-cylinder turbo (258 hp) - G20 generation, updated

Every engine fitted to the BMW 3 Series 330i is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

BMW 3 Series 330i Engine Codes Specifications & Replacement Cost

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

M54B30 — 3.0L Petrol (2000-2005)

Power Output: 231 hp
Years Fitted: 2000-2005

Can’t find your exact engine code?-> Get quotes for M54B30 BMW 3 Series 330i engine replacement

-> Get quotes for M54B30 BMW 3 Series 330i engine replacement

Common Problems

BMW 3 Series 330i Engine Problems Repair Cost vs Replacement

The BMW 3 Series 330i's inline-six and turbo-four engines are renowned for their smooth power delivery and reliability, but age and mileage bring common failure points. Timing chain wear affects the B48 and some N-series engines, while oil consumption and VANOS issues plague the naturally aspirated six-cylinders. Rebuilt 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

Timing Chain Wear

Affected: BMW 3 Series 330i (B48B20, 2016-present; N52/N53/N55, 2005-2016)
Typical failure mileage: 60,000-120,000 miles

Root cause

On B48 engines, the timing chain can experience premature wear due to tensioner or guide failure. On N-series engines, the chain can stretch over time.

Repair options

Repair tier	Dealer price	Specialist price
Timing chain replacement (preventative)	£1,500-£2,800	£800-£1,800
Full Replacement - rebuilt/reconditioned engine	£6,000-£10,000	£2,800-£6,500 (matches Section 4 rebuilt pricing)

Our recommendation

If you hear a rattling noise from the front of the engine on cold start, get it inspected immediately. Replacing the timing chain and tensioner before failure costs £800-£1,800 at a specialist and can save your engine. If the engine has already jumped timing, a full replacement is usually the most cost-effective route - a specialist rebuild with upgraded components costs less than a dealer replacement and carries a 12-month warranty.

-> Compare rebuilt B48/N-series BMW 3 Series 330i engine prices

Oil Consumption and Leaks

Affected: BMW 3 Series 330i (N52B30, 2005-2007)
Typical failure mileage: 80,000-120,000 miles

Root cause

Valve stem seals harden and lose their sealing ability, allowing oil to seep past the valves into the combustion chamber. The valve cover gasket also deteriorates over time, causing external leaks.

Repair options

Repair tier	Dealer price	Specialist price
Valve stem seal replacement	£1,500-£2,500	£800-£1,500
Valve cover gasket replacement	£500-£900	£250-£500
Full Replacement - rebuilt engine	£5,000-£8,000	£3,000-£5,000 (matches Section 4 rebuilt pricing)

Our recommendation

For N52 330i owners, monitor oil consumption carefully. If you're adding more than 1 litre per 1,000 miles, valve stem seal replacement is the cost-effective fix. A full rebuilt engine is only justified if the car is otherwise in excellent condition and you plan to keep it.

-> Compare rebuilt N52 BMW 3 Series 330i engine prices

VANOS Solenoid and Cooling System Failures

Affected: BMW 3 Series 330i (M54B30, N52B30, N53B30 - 2000-2012)
Typical failure mileage: 60,000-100,000 miles

Root cause

VANOS solenoids become clogged with oil debris, affecting variable valve timing and causing rough idling, reduced power, and poor fuel economy. The electric water pump on N-series engines is a known failure point, leading to rapid overheating if not replaced.

Repair options

Repair tier	Dealer price	Specialist price
VANOS solenoid cleaning/replacement	£400-£800	£200-£500
Water pump replacement	£700-£1,200	£400-£800

Our recommendation

For M54 and N52 330i owners, preventative cooling system maintenance is the smart play. Replacing the water pump and thermostat at 60,000 miles costs far less than an engine replacement if a leak leads to overheating. VANOS solenoid cleaning is a simple DIY-friendly job that restores lost performance.

-> Compare rebuilt BMW 3 Series 330i engine prices

Don't Let Engine Failure Write Off Your BMW 3 Series 330i

Whether you own an E46 M54, an E90 N52, an F30 N55, or a G20 B48, engine failure doesn't have to mean the end of the road. Every rebuilt BMW 3 Series 330i engine through EnginesMarket comes with upgraded components addressing the original failure points, a minimum 12-month unlimited-mileage warranty, and nationwide delivery. Compare specialist prices today - and save thousands over main dealer rates.

Compare BMW 3 Series 330i Engine Replacement Prices Now ->

FAQ

BMW 3 Series 330i Engine ReplacementFrequently Asked Questions

Everything BMW 3 Series 330i owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

It depends on the age and value of your car:

E46 330i (worth £3,000-£8,000): repair if possible; full rebuild only if the car is exceptional
E90 330i (worth £3,000-£10,000): timing chain repair or used engine often makes sense
F30 330i (worth £6,000-£16,000): rebuilt engine with warranty is usually a sound investment
G20 330i (worth £15,000-£35,000): replacement cost is small relative to vehicle value

-> Get a BMW 3 Series 330i replacement cost assessment

Yes. Every rebuilt BMW 3 Series 330i engine supplied through EnginesMarket comes with a minimum 12-month unlimited-mileage warranty as standard.

The warranty covers manufacturing defects and parts failure
Upgraded components address the original failure points (e.g. improved timing chain guides on B48)
Always confirm exact warranty terms with your chosen supplier

-> Get a warranted BMW 3 Series 330i engine quote

Why Choose Us

Compare BMW 3 Series 330i Engine Prices Today

Comparing quotes for your BMW 3 Series 330i is free, quick, and completely no-obligation. Whether you need a used M54B30 for an E46, a reconditioned N52B30 for an E90, or a rebuilt B48B20 for a G20, our network of UK specialists has the right engine for your exact 330i and engine code. Enter your registration above and start comparing today.

500+500+ BMW 3 Series 330i engines supplied through our network

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BMW 3 Series 330i Engine Replacement Compare Prices & Get Quotes

Get your free BMW 3-series 330i engine quotes

3 Simple Steps to Finding the Right Replacement Engine

BMW 3 Series 330i Engine History & Specs at a Glance

BMW 3 Series 330i Engine Codes Specifications & Replacement Cost

M54B30 — 3.0L Petrol (2000-2005)

BMW 3 Series 330i Engine Problems Repair Cost vs Replacement

Timing Chain Wear

Oil Consumption and Leaks

VANOS Solenoid and Cooling System Failures

Don't Let Engine Failure Write Off Your BMW 3 Series 330i

BMW 3 Series 330i Engine ReplacementFrequently Asked Questions

Compare BMW 3 Series 330i Engine Prices Today