BMW 3 Series 335d2006–present3 Engine Generations
BMW 3 Series 335d Engine Replacement —Compare Prices &
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Get quotes today from trusted UK BMW 335d specialists. Compare reconditioned, rebuilt and used 3.0-litre straight-six twin-turbo diesel engines — M57, N57 and B57 variants — supply & fit available nationwide.
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BMW 3 Series 335d Engines — from £1,500 to £8,500Common codes: M57D30TU2, N57D30T1, B57D30
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- Reconditioned
- Rebuilt
- Used
- Supply & Fit Available
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The 335d Through Time — Era Map
Three generations. Three eras. One guide to reliability, costs and what really matters.
Era Note
Cast-iron block twin-turbo — swirl flap failure is the critical weakness; otherwise robust
Era Note
Aluminium block; 309 bhp, 630 Nm; timing chain rear-mounted; EGR/DPF issues
Era Note
Modular B57 engine; improved reliability; chain and cooling system revised
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 335d Engine Replacement Costs
- Supply Only£1,500 – £3,500
- Fitted (Indie)£2,300 – £4,700
- Warranty1–6 months
- Best ForBudget priority; vehicle under £6,000
- Supply Only£4,000 – £7,500
- Fitted (Indie)£4,800 – £8,700
- Warranty12–24 months
- Best ForMost owners — best cost/warranty balance
- Supply Only£6,000 – £8,500
- Fitted (Indie)£6,800 – £9,700
- Warranty12–24 months
- Best ForLong-term ownership; 3+ year horizon
- Supply Only£10,000 – £15,000
- Fitted (Indie)£11,500 – £17,000
- Warranty24–36 months
- Best ForInsurance jobs, warranty claims
Figures above reflect current 335d replacement costs. The N57 and B57 variants typically sit at the higher end of the range. See the Era Map above for generation-specific pricing.
Labour estimate: Fitting a 335d engine typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).
Common Problems With BMW 3 Series 335d Engines
2. Timing Chain Stretch(N57 — F30 Generation)
3. DPF & EGR Clogging(All Generations)
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3 Series 335d — 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 |
|---|---|---|---|
| Swirl flap failure (M57 — preventative) | Yes | £300 – £600 | Essential maintenance on M57 — replace with metal flaps or delete |
| Swirl flap failure (catastrophic — M57) | Usually No | Engine replacement | Debris ingestion typically destroys the engine |
| Timing chain stretch (N57 — preventative) | Yes | £1,500 – £3,000 | Catch it early — engine-out job but far cheaper than replacement |
| Snapped timing chain (N57) | Usually No | Engine replacement | Piston-valve contact means little is left to repair |
| DPF clogging (all generations) | Yes | £400 – £1,200 | Standard maintenance on any modern diesel |
| EGR clogging (all generations) | Yes | £300 – £800 | Regular cleaning or replacement |
| Injector failure (all generations) | Yes | £500 – £1,500 | Viable repair on a well-maintained vehicle |
ProblemRepairable? · Typical Cost
Swirl flap failure (M57 — preventative)
Yes£300 – £600
Essential maintenance on M57 — replace with metal flaps or delete
Swirl flap failure (catastrophic — M57)
Usually NoEngine replacement
Debris ingestion typically destroys the engine
Timing chain stretch (N57 — preventative)
Yes£1,500 – £3,000
Catch it early — engine-out job but far cheaper than replacement
Snapped timing chain (N57)
Usually NoEngine replacement
Piston-valve contact means little is left to repair
DPF clogging (all generations)
Yes£400 – £1,200
Standard maintenance on any modern diesel
EGR clogging (all generations)
Yes£300 – £800
Regular cleaning or replacement
Injector failure (all generations)
Yes£500 – £1,500
Viable repair on a well-maintained vehicle
Buying This 335d? Check These First
Buy if:
- M57-engined car (E90) with swirl flaps replaced with metal items or deleted
- N57-engined car (F30) with documented timing chain history (or B57 in G20)
- Full service history with regular oil changes (critical for chain longevity)
- EGR recall completed (where applicable)
- Evidence of regular longer runs (DPF health)
Avoid if:
- M57 with no swirl flap history — assume they're original plastic and budget £300–£600
- N57 with cold-start rattle and no chain history — assume it's overdue
- No service history — both M57 and N57 are unforgiving of neglect
- Short-journey ownership history — DPF and EGR issues likely
- Unexplained coolant loss — may indicate EGR cooler or head gasket issues
Closing verdict
The 335d is BMW's flagship 3.0-litre twin-turbo diesel — a genuine performance icon across three generations. The M57 (E90) is a cast-iron classic with swirl flap vulnerability — address that and it's a robust engine. The N57 (F30) offers more power but has rear-mounted timing chain concerns — budget for chain maintenance if the history is unclear. The B57 (G20) is the modern, improved version with fewer known issues. With typical values ranging from £6,000 (E90) to £20,000+ (G20), an engine replacement is a significant but often worthwhile investment on cherished examples.
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Buying Checklist
Before you buy a used BMW 3 Series 335d (or before you commit to an engine replacement), check these:
1. Cold Start
Listen for rattling (N57 timing chain warning) — see the map above
2. Service History
Including which engine era (M57, N57 or B57) and oil-change discipline
3. Swirl Flaps
For M57 (E90): confirm replacement with metal flaps or deletion
4. Timing Chain
For N57 (F30): check for any chain work or cold-start rattle
5. DPF Regeneration
Check history; short journeys accelerate wear on all diesel eras
6. Smoke Check
White smoke on startup can indicate EGR cooler or injector issues
7. Turbo Boost
Test acceleration; any lag, whistling, or grinding? (twin-turbo setup)
8. Engine Warning Light
Have codes been read? Any unresolved issues?
9. MOT History
Check for emissions-related failures
Buying Checklist
Before you buy a used BMW 3 Series 335d (or before you commit to an engine replacement), check these:
- 1
Cold Start
Listen for rattling (N57 timing chain warning) — see the map above
- 2
Service History
Including which engine era (M57, N57 or B57) and oil-change discipline
- 3
Swirl Flaps
For M57 (E90): confirm replacement with metal flaps or deletion
- 4
Timing Chain
For N57 (F30): check for any chain work or cold-start rattle
- 5
DPF Regeneration
Check history; short journeys accelerate wear on all diesel eras
- 6
Smoke Check
White smoke on startup can indicate EGR cooler or injector issues
- 7
Turbo Boost
Test acceleration; any lag, whistling, or grinding? (twin-turbo setup)
- 8
Engine Warning Light
Have codes been read? Any unresolved issues?
- 9
MOT History
Check for emissions-related failures
Buy smart. Drive with confidence.
A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 3 Series 335d pitfalls.
Engine Codes
This table's rows match Section 1B's Era Map exactly.
M57D30TU2
- Years
- 2006–2011 (E90/E91/E92)
- Power
- 286 bhp @ 4,400rpm
- 2025 Enquiries
- —(within M57 family volume)
- Avg. Recon Cost
- £4,000–£6,500[PLACEHOLDER]
N57D30T1
- Years
- 2012–2019 (F30/F31/F34)
- Power
- 309 bhp @ 4,400rpm
- 2025 Enquiries
- —(within N57 family volume)
- Avg. Recon Cost
- £5,000–£7,500[PLACEHOLDER]
B57D30
- Years
- 2020–present (G20)
- Power
- 340 bhp @ 4,400rpm
- 2025 Enquiries
- —(within B57 family volume)
- Avg. Recon Cost
- £5,500–£8,500[PLACEHOLDER]
Technical SpecsB57D30 — G20 generation
- Displacement
- 2,993cc
- Cylinders
- 6-cylinder inline, aluminium block
- Compression Ratio
- 16.5:1
- Fuel System
- Common-rail direct injection
- Torque
- 630 Nm @ 1,500–2,500 rpm
- Displacement
- 2,993cc
- Cylinders
- 6-cylinder inline, aluminium block
- Fuel System
- Common-rail direct injection
- Torque
- 680–700 Nm
Market Intelligence
Real data from thousands of 3 Series 335d enquiries in 2025.
Most Common FailureSwirl flap failure (M57) / Timing chain stretch (N57)
The defining issues of each generation
Average Enquiry Mileage
70,000–100,000
miles
[PATTERN DATA]Average Replacement Cost
£5,000–£6,500
reconditioned, supply only
[PLACEHOLDER]Most Requested Engine Code
N57D30T1
[PATTERN DATA]Peak Enquiry Season
Winter
Cold starts expose chain wear; summer — DPF/EGR issues emerge
[PATTERN DATA]Regional Demand
- South East
- 18%
- North West
- 16%
- Midlands
- 14%
- Other Regions
- 52%
Regional Demand Breakdown
14%Midlands18%South East16%North West52%Other Regions
Frequently Asked Questions
A reconditioned 335d engine typically costs £4,000–£7,500 supply only, with the N57 and B57 variants at the higher end. Fitting adds £900–£1,500 depending on the specialist. A fully remanufactured unit from a dedicated specialist can cost from £7,500 upwards. Use our calculator for a figure specific to your 3 Series.
It depends on which generation you have. The M57 (E90, 2006–2011) is a cast-iron classic — robust but with swirl flap vulnerability. The N57 (F30, 2012–2019) offers more power (309 bhp) but has rear-mounted timing chain concerns. The B57 (G20, 2020–present) is the most refined and reliable. All generations require regular maintenance and DPF/EGR vigilance.
Swirl flap failure on the M57 (E90) — plastic flaps can break and destroy the engine. Timing chain stretch on the N57 (F30) — rear-mounted chain is expensive to replace. DPF and EGR clogging across all generations. The B57 (G20) is significantly improved.
Depends on the generation and vehicle condition. Against a well-kept F30 worth £8,000–£15,000, a £5,000–£7,000 recon is 30–70% of the car's value — borderline but often worth it. Against a tired E90 worth £4,000–£6,000, the same recon may exceed our 70% BMW threshold — get a scrap valuation first. G20 values (£15,000–£25,000) make replacement more viable.
E90/E91/E92 (2006–2011): M57D30TU2. F30/F31/F34 (2012–2019): N57D30T1. G20 (2020–present): B57D30. Check the VIN plate or vehicle documentation.
The chain must be replaced — it's a rear-mounted chain that requires engine removal for access. A preventative replacement costs £1,500–£3,000. A snapped chain almost always destroys the engine, requiring a £5,000–£7,500 replacement. At the first sign of cold-start rattle, book an inspection immediately.
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 condition, 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. We cover the 3.0-litre twin-turbo diesel specifically, with specialists who understand the swirl flap vulnerability (M57), timing chain concerns (N57) and the improved B57 design.
UK Engine Replacement Services for 335d
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