BMW 3 Series 335d Engine Replacement — Compare Prices & Get Quotes
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.
The 335d THROUGH TIME - Era Map
Four generations. Four 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
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.
BMW 3 Series 335d Engine Replacement Costs
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).
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3 Series 335d - 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?
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:
Cold Start
Listen for rattling (N57 timing chain warning) - see the map above
Service History
Including which engine era (M57, N57 or B57) and oil-change discipline
Swirl Flaps
For M57 (E90): confirm replacement with metal flaps or deletion
Timing Chain
For N57 (F30): check for any chain work or cold-start rattle
DPF Regeneration
Check history; short journeys accelerate wear on all diesel eras
Smoke Check
White smoke on startup can indicate EGR cooler or injector issues
Turbo Boost
Test acceleration; any lag, whistling, or grinding? (twin-turbo setup)
Engine Warning Light
Have codes been read? Any unresolved issues?
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 320d pitfalls.
BMW 320d Engine Codes
This table's rows match Section 1B's Era Map exactly.
M57D30TU2
Technical Specs
B57D30 - G20 generation→ Compare 335d engine prices for your 3 Series
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Market Intelligence
Most Common Failure
Swirl 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
PATTERN DATA
Regional Demand Breakdown
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 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.
Why UK BMW 3 Series 335d Owners Trust BMWEngines.uk
Trusted 335d Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real 3 Series 335d owners, as part of the Engine Finders network, across every generation - M57, N57 and B57 - covering the E90, F30 and G20 chassis.
Compare 335d Engine Replacement Companies
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
supply-only or full supply & fit available nationwide, covering every generation of this badge since 2006, with a 12-month warranty as standard across our network.
Find the best BMW 3 Series 335d engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence.
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No hidden fees
No Obligation
Get quotes with zero pressure
UK Specialists
20+ vetted experts
12-Month Warranty
As standard
Nationwide Delivery
Supply & fit available