BMW 3 Series 328i1995–2015Four Engine Generations
BMW 3 Series 328i Engine Replacement —Compare Prices &
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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
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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
Era Note
193hp — dual VANOS, aluminium block; cooling system is key watchpoint
Era Note
230hp magnesium six — oil leaks and valvetronic motor are main issues
Era Note
245hp turbo — timing chain guide failure is the defining risk
Why use this era map?
Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.
- Real UKCost Data
- VerifiedReliability
- ExpertInsights
- Updated for2025
BMW 3 Series 328i Engine Replacement Costs
- Supply Only£1,200 – £3,500
- Fitted (Indie)£1,900 – £4,600
- Warranty1–6 months
- Best ForBudget priority; older E36/E46 donors
- Supply Only£2,200 – £5,000
- Fitted (Indie)£3,000 – £6,200
- Warranty12–24 months
- Best ForMost owners — best cost/warranty balance
- Supply Only£3,500 – £7,000
- Fitted (Indie)£4,300 – £8,200
- Warranty12–24 months
- Best ForLong-term ownership; 5+ year horizon
- Supply Only£6,000 – £12,000
- Fitted (Indie)£7,500 – £13,500
- Warranty24–36 months
- Best ForInsurance 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.
Common Problems With BMW 3 Series 328i Engines
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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20+ vetted BMW specialists, covering every 328i era — M52, M52TU, N52 and N20 — with a 12-month warranty as standard.
3 Series 328i — Repair, Buy, or Replace?
Not every issue means a new engine.Here’s what can be repaired, when it makes sense, and what to check before you buy.
Can It Be Repaired?
| Problem | Repairable? | Typical Cost | When It Makes Sense |
|---|---|---|---|
| N20 timing chain guides | Yes | £1,500 – £3,500 | Preventative — cheaper than engine replacement |
| M52 cooling system failure | Yes | £400 – £1,000 | Proactive replacement at 80k miles |
| N52 oil leaks (gaskets) | Yes | £500 – £1,200 | Essential maintenance — ignore leads to bigger issues |
| N52 valvetronic motor failure | Yes | £600 – £1,200 | Viable on any well-maintained E90 |
| M52 Nikasil bore wear | Sometimes | £2,000 – £4,000 | Only viable on low-mileage, otherwise scrap and replace |
ProblemRepairable? · Typical Cost
N20 timing chain guides
Yes£1,500 – £3,500
Preventative — cheaper than engine replacement
M52 cooling system failure
Yes£400 – £1,000
Proactive replacement at 80k miles
N52 oil leaks (gaskets)
Yes£500 – £1,200
Essential maintenance — ignore leads to bigger issues
N52 valvetronic motor failure
Yes£600 – £1,200
Viable on any well-maintained E90
M52 Nikasil bore wear
Sometimes£2,000 – £4,000
Only 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.
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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:
1. Cold Start
Any rattle? N20 chain rattle is the biggest warning; M52/M52TU/N52 should be smooth
2. Service History
Check the year to identify which engine — see the Era Map above
3. Timing Chain History
N20: chains replaced? Tensioner checked? (pre-2015 is critical)
4. Cooling System
M52/M52TU: any coolant loss? Water pump and thermostat history?
5. Oil Leaks
N52: any burning smell or oil spots? Valve cover and oil filter housing are key
6. Valvetronic
N52: any hesitation or engine light? Valvetronic motor is common
7. Nikasil
E36 M52 pre-1998: check compression; high oil consumption is a warning
8. Engine Warning Light
Have codes been read? Resolve before buying
Buying Checklist
Before you buy a used BMW 3 Series 328i (or before you commit to an engine replacement), check these:
- 1
Cold Start
Any rattle? N20 chain rattle is the biggest warning; M52/M52TU/N52 should be smooth
- 2
Service History
Check the year to identify which engine — see the Era Map above
- 3
Timing Chain History
N20: chains replaced? Tensioner checked? (pre-2015 is critical)
- 4
Cooling System
M52/M52TU: any coolant loss? Water pump and thermostat history?
- 5
Oil Leaks
N52: any burning smell or oil spots? Valve cover and oil filter housing are key
- 6
Valvetronic
N52: any hesitation or engine light? Valvetronic motor is common
- 7
Nikasil
E36 M52 pre-1998: check compression; high oil consumption is a warning
- 8
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 3 Series 328i pitfalls.
Engine Codes
This table's rows match Section 1B's Era Map exactly.
M52B28 (2.8L I6)
- Years
- 1995–1999
- Power
- 190–193 bhp
- 2025 Enquiries
- —(pattern data - heritage)
- Avg. Recon Cost
- £1,800–£3,000[PLACEHOLDER]
M52TÜB28 (2.8L I6, dual VANOS)
- Years
- 1997–2000
- Power
- 193 bhp
- 2025 Enquiries
- —(pattern data - heritage)
- Avg. Recon Cost
- £2,200–£3,800[PLACEHOLDER]
N52B30 (3.0L I6)
- Years
- 2006–2011
- Power
- 230 bhp
- 2025 Enquiries
- —(pattern data - high-volume UK)
- Avg. Recon Cost
- £2,500–£4,500[PLACEHOLDER]
N20B20 (2.0L turbo four)
- Years
- 2012–2015
- Power
- 245 bhp
- 2025 Enquiries
- —(pattern data - high-volume UK)
- Avg. Recon Cost
- £2,800–£5,500[PLACEHOLDER]
Technical SpecsN20B20
- Displacement
- 2,793 cc
- Cylinders
- 6-cylinder inline
- Compression Ratio
- 10.2:1
- Fuel System
- Multi-point injection (MPFI)
- Turbocharger
- Naturally aspirated
- Displacement
- 2,793 cc
- Cylinders
- 6-cylinder inline
- Compression Ratio
- 10.2:1
- Fuel System
- Multi-point injection
- Turbocharger
- Naturally aspirated
- Displacement
- 2,996 cc
- Cylinders
- 6-cylinder inline
- Compression Ratio
- 10.7:1
- Fuel System
- Multi-port manifold injection
- Turbocharger
- Naturally aspirated
- Displacement
- 1,997 cc
- Cylinders
- 4-cylinder inline
- Compression Ratio
- 10.0:1
- Fuel System
- Direct injection
- Turbocharger
- Single twin-scroll
Market Intelligence
Real data from thousands of 3 Series 328i enquiries in 2025.
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]Average Enquiry Mileage
75,000
miles
[PATTERN DATA]Average Replacement Cost
£4,000
reconditioned (N52 era), supply only
[PLACEHOLDER]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 East
- 22%
- London
- 18%
- North West
- 15%
- Other Regions
- 45%
Regional Demand Breakdown
18%London22%South East15%North West45%Other Regions
Frequently Asked Questions
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.
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.
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).
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.
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.
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.
Disclaimer: 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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