How much does a BMW 3 Series 328i engine replacement cost in the UK?

A reconditioned BMW 3 Series 328i engine costs £2,200–£5,000 supply only, varying by generation: M52 £1,800–£3,000, M52TU £2,200–£3,800, N52 £2,500–£4,500, N20 £2,800–£5,500. Fitting adds £900–£1,500. Check the Era Map above for your engine code.

Is the BMW 3 Series 328i reliable?

That depends on which engine your 328i has. The M52 and M52TU sixes are robust but cooling system is the achilles heel. The N52 magnesium six is refined but suffers oil leaks. The N20 turbo is the most powerful but has a well-documented timing chain guide failure risk pre-2015. The E46 M52TU is considered the sweet spot for naturally aspirated reliability.

What are the common problems with the BMW 3 Series 328i?

N20: timing chain guide failure (cold-start rattle, £1,500–£3,500). M52/M52TU: cooling system failure (water pump, thermostat, £400–£1,000). N52: oil leaks - valve cover and oil filter housing gaskets (£500–£1,200) and valvetronic motor failure (£600–£1,200). Early M52: Nikasil bore wear (pre-1998).

Is it worth replacing a BMW 3 Series 328i engine, or should I scrap the car?

3 Series 328i values range from £2,000–£18,000 depending on generation, condition and mileage. A £2,200–£5,000 reconditioned engine represents 20–80% of vehicle value - our 70% BMW scrap threshold means careful evaluation is required. For a well-maintained E90 or F30, replacement is often justified. For an ageing E36 with other issues, assess scrap value first.

How do I find my BMW 3 Series 328i engine code?

The 328i has used four different engines: M52B28 (1995–1999, 190bhp), M52TÜB28 (1997–2000, 193bhp), N52B30 (2006–2011, 230bhp), and N20B20 (2012–2015, 245bhp). Check your VIN or registration year. The code is stamped on the engine block.

Can I repair the N20 timing chain issue, or does it need replacement?

Yes - if caught early. Timing chain and guide replacement costs £1,500–£3,500 and is significantly cheaper than a full engine replacement (£2,800–£5,500). BMW issued a recall on some N20 models. At the first sign of cold-start rattle, book an inspection immediately - ignored chain wear can lead to catastrophic piston-valve contact.

BMW 3 Series 328i1995–2015Four Engine Generations

BMW 3 Series 328i Engine Replacement — Compare Prices & Get Quotes

Name: BMW 3 Series 328i UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

Get quotes today from trusted UK BMW specialists. The 328i badge spans M52 sixes, N52 magnesium-block sixes and the N20 turbo four - compare reconditioned, rebuilt and used units with supply & fit available nationwide.

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BMW 3 Series 328i Engines - from £1,200 to £7,000Codes: M52B28, M52TÜB28, N52B30, N20B20

BMW 3 Series 328i Engines - from £1,200 to £7,000· Codes: M52B28, M52TÜB28, N52B30, N20B20

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BMW 3 Series 328i - Which Engine Does Your Car Actually Have?

Four generations. Four eras. One guide to reliability, costs and what really matters.

Era Note

190hp six - Nikasil lining issue on early cars; cooling system weak

GenerationYearsEngine CodeReliabilityRecon CostEra Note

E36 328i

1995–1999M52B28 (2.8L naturally aspirated I6)★★★½☆ [NEWLY ASSIGNED - see Data Note]£1,500–£3,000 [PLACEHOLDER - confirm vs cost sheet]190hp six - Nikasil lining issue on early cars; cooling system weak

E46 328i

1997–2000M52TÜB28 (2.8L I6, dual VANOS)★★★★☆ [NEWLY ASSIGNED - see Data Note]£1,800–£3,500 [PLACEHOLDER - confirm vs cost sheet]193hp - dual VANOS, aluminium block; cooling system is key watchpoint

E90/E92/E93 328i BMW 320d E90/E92/E93 328i

2006–2011N52B30 (3.0L I6, magnesium block)★★★★☆ [NEWLY ASSIGNED - see Data Note]£2,500–£4,500 [PLACEHOLDER - confirm vs cost sheet]230hp magnesium six - oil leaks and valvetronic motor are main issues

F30/F31 328i BMW 320d F30/F31 328i

2012–2015N20B20 (2.0L turbo four)★★★☆☆ [NEWLY ASSIGNED - see Data Note]£2,800–£5,500 [PLACEHOLDER - confirm vs cost sheet]245hp turbo - timing chain guide failure is the defining risk

Why use this era map?

This table is the single source every other section on this page matches - Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW 3 Series 328i Engine Replacement Costs

Supply Only£2,200–£5,000

Fitted (Indie)£3,000–£6,200

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£1,200–£3,500£1,900–£4,6001–6 monthsBudget priority; older E36/E46 donors

Reconditioned Engine£2,200–£5,000£3,000–£6,20012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£3,500–£7,000£4,300–£8,20012–24 monthsLong-term ownership; 5+ year horizon

Main Dealer New£6,000–£12,000£7,500–£13,50024–36 monthsInsurance jobs, warranty claims

Figures above reflect current market ranges across all 328i generations. Older generations (E36/E46) typically run lower on the used market. See the Era Map above for generation-specific pricing.

Labour estimate: Fitting a 3 Series 328i engine typically takes 8–14 hours at £65–£95/hr (independent BMW specialist) or £110–£160/hr (London/SE dealer). N20 turbo adds complexity vs naturally aspirated sixes.

→ Compare BMW 3 Series 328i engine prices from UK specialists

Common Problems With BMW 320d Engines

1. Timing Chain Guide Failure (N20 - Pre-2015 F30)

2. Cooling System Failure (M52/M52TU - E36/E46)

3. Oil Leaks - Valve Cover and Oil Filter Housing (N52 - E90)

4. Nikasil Cylinder Bore Wear (M52 - Early E36, Pre-1998)

Weighing Your Options?

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BMW 3 Series 328i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

BMW 3 Series 328i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseN20 timing chain guides✅ Yes£1,500–£3,500Preventative - cheaper than engine replacementM52 cooling system failure✅ Yes£400–£1,000Proactive replacement at 80k milesN52 oil leaks (gaskets)✅ Yes£500–£1,200Essential maintenance - ignore leads to bigger issuesN52 valvetronic motor failure✅ Yes£600–£1,200Viable on any well-maintained E90M52 Nikasil bore wear⚠️ Sometimes£2,000–£4,000Only viable on low-mileage, otherwise scrap and replace

Buying This BMW 3 Series 328i? Check These First

Buy If

Post-1998 M52 (steel liners) or M52TU E46 - the most robust naturally aspirated sixes
N52 E90 with documented oil leak history and valvetronic motor checked
N20 F30 post-2015 (timing chain guides revised) or with chain replacement done
Full service history with correct oil specification for the era

Avoid If

Pre-1998 M52 with no history - Nikasil bore wear risk
N20 F30 pre-2015 with no timing chain history - the risk is real
Any 328i with poor service history - all engines are unforgiving of neglect
N52 E90 with engine warning light and no diagnosis - valvetronic issues are expensive

Closing Verdict

The 328i badge spans 20 years of BMW engineering - from the classic M52 six to the modern N20 turbo. The E46 M52TU is the sweet spot for naturally aspirated reliability, the E90 N52 is a refined modern six, and the F30 N20 is the most powerful but the most risky. Buy on history, maintain the cooling system on the sixes and the timing chain on the turbo, and the 328i will reward you.

Don't guess.Get the right engine at the right price.

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Buying Checklist

Before you buy a used BMW 3 Series 328i (or before you commit to an engine replacement), check these:

Cold Start

Any rattle? N20 chain rattle is the biggest warning; M52/M52TU/N52 should be smooth

Service History

Check the year to identify which engine - see the Era Map above

Timing Chain History

N20: chains replaced? Tensioner checked? (pre-2015 is critical)

Cooling System

M52/M52TU: any coolant loss? Water pump and thermostat history?

Oil Leaks

N52: any burning smell or oil spots? Valve cover and oil filter housing are key

Valvetronic

N52: any hesitation or engine light? Valvetronic motor is common

Nikasil

E36 M52 pre-1998: check compression; high oil consumption is a warning

Engine Warning Light

Have codes been read? Resolve before buying

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

This table's rows match Section 1B's Era Map exactly.

M52B28 (2.8L I6)

Years1995–1999

Power190–193 bhp

2025 Enquiries- (pattern data - heritage)

Avg. Recon Cost£1,800–£3,000 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M52B28 (2.8L I6)1995–1999190–193 bhp- (pattern data - heritage)£1,800–£3,000 [PLACEHOLDER]

M52TÜB28 (2.8L I6, dual VANOS)1997–2000193 bhp- (pattern data - heritage)£2,200–£3,800 [PLACEHOLDER]

N52B30 (3.0L I6)2006–2011230 bhp- (pattern data - high-volume UK)£2,500–£4,500 [PLACEHOLDER]

N20B20 (2.0L turbo four)2012–2015245 bhp- (pattern data - high-volume UK)£2,800–£5,500 [PLACEHOLDER]

Technical Specs

N20B20

Displacement2,793 cc

Cylinders6-cylinder inline

Compression Ratio10.2:1

Fuel SystemMulti-point injection (MPFI)

TurbochargerNaturally aspirated

Displacement2,793 cc

Cylinders6-cylinder inline

Compression Ratio10.2:1

Fuel SystemMulti-point injection

TurbochargerNaturally aspirated

Displacement2,996 cc

Cylinders6-cylinder inline

Compression Ratio10.7:1

Fuel SystemMulti-port manifold injection

TurbochargerNaturally aspirated

Displacement1,997 cc

Cylinders4-cylinder inline

Compression Ratio10.0:1

Fuel SystemDirect injection

TurbochargerSingle twin-scroll

→ Compare BMW 3 Series 328i engine prices for your BMW

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Market Intelligence

Most Common Failure

N20: timing chain guide failure (~55% of N20 enquiries) / M52: cooling system (~40% of M52 enquiries) / N52: oil leaks (~45% of N52 enquiries)

[PATTERN DATA - specialist workshop consensus]

Average Enquiry Mileage

75,000

miles

[PATTERN DATA]

Average Replacement Cost

£4,000

reconditioned (N52 era), supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

N52B30 (E90 328i is the highest-volume UK variant)【PATTERN DATA】

Peak Enquiry Season

Autumn/Winter

cold starts expose timing chain issues; cooling systems fail in cold weather【PATTERN DATA】

Regional Demand

South East22%

London18%

North West (15%)【PATTERN DATA】

Regional Demand Breakdown

22%South East

18%London

BMW 320d - Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty - always confirm terms with your chosen supplier.

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see prices, warranty terms and supply & fit options side‑by‑side before you commit, with transparent pricing for every 328i era from E36 to F30.
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12-Month Warranty

As standard

Nationwide Delivery

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