BMW 6 Series 630d2010–20243 Engine Generations
BMW 6 Series 630d Engine Replacement —Compare Prices &
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Get quotes today from trusted UK BMW 630d specialists. Compare reconditioned, rebuilt and used 3.0-litre straight-six turbo-diesel engines — N57 and B57 variants across the F06, F12, F13 and G32 generations — supply & fit available nationwide.
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BMW 6 Series 630d Engines — from £1,500 to £9,500Common codes: N57D30O0, N57D30O1, B57D30A
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- Used
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The 630d Through Time — Era Map
Three generations. Three eras. One guide to reliability, costs and what really matters.
Era Note
First-gen N57 3.0L straight-six; 245 hp, 540 Nm; rear-mounted timing chain is the critical weakness
Era Note
Revised N57 with 258 hp, 560 Nm; improved timing chain design; EGR/DPF issues remain
Era Note
Modular B57 engine; 265 hp, 620 Nm; chain relocated; DPF and EGR are the primary maintenance watch items
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 6 Series 630d Engine Replacement Costs
- Supply Only£1,500 – £3,500
- Fitted (Indie)£2,300 – £4,700
- Warranty1–6 months
- Best ForBudget priority; vehicle under £10,000
- Supply Only£4,500 – £7,500
- Fitted (Indie)£5,300 – £8,700
- Warranty12–24 months
- Best ForMost owners — best cost/warranty balance
- Supply Only£6,500 – £9,500
- Fitted (Indie)£7,300 – £10,700
- 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 630d replacement costs. The B57 variant typically sits at the higher end of the range. See the Era Map above for generation-specific pricing.
Labour estimate: Fitting a 630d engine typically takes 12–16 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).
Common Problems With BMW 6 Series 630d Engines
2. Diesel Particulate Filter (DPF) Blockage(All Generations)
3. EGR Valve Failure(All Generations)
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6 Series 630d — 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 |
|---|---|---|---|
| Timing chain rattle (N57 — preventative) | Yes | £1,500 – £3,500 | Essential maintenance — catch it before catastrophic failure |
| Snapped timing chain (N57) | Usually No | Engine replacement | Piston-valve contact means little is left to repair |
| DPF clogging | Yes | £400 – £1,200 | Standard maintenance on any modern diesel |
| EGR valve clogging | Yes | £300 – £800 | Regular cleaning or replacement |
| Turbocharger failure | Sometimes | £1,500 – £3,500 | Viable on a high-value 6 Series |
| Spun connecting rod bearing | Usually No | Engine rebuild or replacement | Often caused by lack of oil changes; requires full rebuild |
ProblemRepairable? · Typical Cost
Timing chain rattle (N57 — preventative)
Yes£1,500 – £3,500
Essential maintenance — catch it before catastrophic failure
Snapped timing chain (N57)
Usually NoEngine replacement
Piston-valve contact means little is left to repair
DPF clogging
Yes£400 – £1,200
Standard maintenance on any modern diesel
EGR valve clogging
Yes£300 – £800
Regular cleaning or replacement
Turbocharger failure
Sometimes£1,500 – £3,500
Viable on a high-value 6 Series
Spun connecting rod bearing
Usually NoEngine rebuild or replacement
Often caused by lack of oil changes; requires full rebuild
Buying This 630d? Check These First
Buy if:
- Post-LCI F06/F12/F13 (2014+) with N57TU (improved timing chain design)
- G32 (2017+) with the B57 engine (modular design, improved reliability)
- Documented timing chain history on any N57-engined car
- Full service history with regular oil changes (critical for chain and bearing longevity)
- Evidence of regular longer runs (DPF health)
Avoid if:
- Pre-2014 N57 with cold-start rattle and no chain history — assume it's overdue
- No service history — the N57 is unforgiving of neglect
- Short-journey ownership history — DPF and EGR issues likely
- Unexplained coolant loss or oil consumption — may indicate deeper issues
- Any 630d with a history of spun bearings — this is catastrophic
Closing verdict
The 630d is BMW's 3.0-litre straight-six diesel flagship across the 6 Series range — offering effortless performance, refinement and economy in a luxury grand tourer package. The N57 (F06/F12/F13) is a powerful and efficient engine with one critical weakness — the rear-mounted timing chain. Post-2014 N57TU versions are improved, but chain maintenance remains important. The B57 (G32 Gran Turismo) is the most refined and reliable, with the chain design improved. All 630d engines share DPF and EGR maintenance requirements. With typical 6 Series values ranging from £10,000 (F13) to £35,000+ (G32), an engine replacement is a significant investment — the B57-engined G32 is the safest choice, but a well-maintained N57TU can also serve well.
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Buying Checklist
Before you buy a used BMW 6 Series 630d (or before you commit to an engine replacement), check these:
1. Cold Start
Listen for rattling from the rear of the engine (N57 timing chain warning) — see the map above
2. Service History
Including which engine era (N57D30O0, N57D30O1 or B57D30A) and oil-change discipline
3. Timing Chain
For N57 (F06/F12/F13): check for any chain work or cold-start rattle
4. DPF Regeneration
Check history; short journeys accelerate wear on all diesel eras
5. EGR System
Look for signs of carbon buildup; any performance issues may indicate EGR problems
6. Turbo Health
Test acceleration; any lag, whistling, or hesitation?
7. Oil Condition
Check for any metallic particles (bearing wear warning)
8. Engine Warning Light
Have codes read; unresolved issues may indicate DPF, EGR or timing problems
9. MOT History
Check for emissions-related failures
Buying Checklist
Before you buy a used BMW 6 Series 630d (or before you commit to an engine replacement), check these:
- 1
Cold Start
Listen for rattling from the rear of the engine (N57 timing chain warning) — see the map above
- 2
Service History
Including which engine era (N57D30O0, N57D30O1 or B57D30A) and oil-change discipline
- 3
Timing Chain
For N57 (F06/F12/F13): check for any chain work or cold-start rattle
- 4
DPF Regeneration
Check history; short journeys accelerate wear on all diesel eras
- 5
EGR System
Look for signs of carbon buildup; any performance issues may indicate EGR problems
- 6
Turbo Health
Test acceleration; any lag, whistling, or hesitation?
- 7
Oil Condition
Check for any metallic particles (bearing wear warning)
- 8
Engine Warning Light
Have codes read; unresolved issues may indicate DPF, EGR or timing problems
- 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 6 Series 630d pitfalls.
Engine Codes
This table's rows match Section 1B's Era Map exactly.
N57D30O0
- Years
- 2010–2014 (F06/F12/F13)
- Power
- 245 hp @ 4,000rpm
- 2025 Enquiries
- —(within N57 family volume)
- Avg. Recon Cost
- £4,500–£7,500[PLACEHOLDER]
N57D30O1 (N57TU)
- Years
- 2014–2018 (F06/F12/F13 LCI)
- Power
- 258 hp @ 4,000rpm
- 2025 Enquiries
- —(within N57 family volume)
- Avg. Recon Cost
- £5,000–£8,000[PLACEHOLDER]
B57D30A / B57D30O0
- Years
- 2017–2024 (G32 Gran Turismo)
- Power
- 265 hp @ 4,000rpm
- 2025 Enquiries
- —(within B57 family volume)
- Avg. Recon Cost
- £5,500–£9,500[PLACEHOLDER]
Technical SpecsN57D30O0 — F06/F12/F13 generation
- Displacement
- 2,993cc
- Cylinders
- 6-cylinder inline
- Compression Ratio
- 16.5:1
- Fuel System
- Common-rail direct injection, turbocharged
- Valves
- 24 valves, DOHC
- Torque
- 620 Nm @ 2,000 rpm
- Bore × Stroke
- 84mm × 90mm
- Emissions
- Euro 6 (WLTP) with SCR catalyst and DPF
- Displacement
- 2,993cc
- Cylinders
- 6-cylinder inline, aluminium block
- Compression Ratio
- 16.5:1
- Fuel System
- Common-rail direct injection, variable geometry turbocharger
- Torque
- 540 Nm @ 1,750–3,000 rpm
Market Intelligence
Real data from thousands of 6 Series 630d enquiries in 2025.
Most Common FailureN57 timing chain stretch (pre-LCI F06/F12/F13)
The defining issue of the earlier 630d
Average Enquiry Mileage
60,000–90,000
miles
[PATTERN DATA]Average Replacement Cost
£5,500–£6,500
reconditioned, supply only
[PLACEHOLDER]Most Requested Engine Code
N57D30O0 / B57D30A
[PATTERN DATA]Peak Enquiry Season
Winter
Cold starts expose timing chain wear
[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 630d engine typically costs £4,500–£7,500 supply only, with the B57 variant at the higher end. Fitting adds £900–£1,500 depending on the specialist. A blown engine replacement on a BMW can cost between £9,000 and £13,000. Reconditioned N57 units are available with 12-month warranty and supply & fit service. Use our calculator for a figure specific to your 6 Series.
It depends on which generation you have. The pre-2014 N57 (F06/F12/F13) has a well-documented timing chain stretch risk — the chain is located at the rear of the engine, making replacement expensive. The post-2014 N57TU is improved. The B57 (G32, 2017+) is the most refined and reliable, with the chain design improved. All 630d engines share DPF and EGR maintenance requirements.
Timing chain stretch on early N57 engines (pre-2014) — rattling from the rear of the engine is the warning sign. DPF clogging — particularly with short journeys. EGR valve clogging with soot and carbon deposits. Turbocharger wear on high-mileage vehicles. Spun connecting rod bearings — often due to a lack of oil changes.
Depends on the generation and vehicle condition. Against a well-kept G32 worth £20,000–£35,000, a £5,500–£7,500 recon is 15–35% of the car's value — worth it. Against a tired F13 worth £8,000–£12,000, the same recon may approach our 70% BMW threshold — get a scrap valuation first. B57-engined cars command a premium due to improved reliability.
F06/F12/F13 (2010–2014): N57D30O0. F06/F12/F13 LCI (2014–2018): N57D30O1. G32 Gran Turismo (2017–2024): B57D30A / B57D30O0. Check the VIN plate or vehicle documentation.
The chain and guides must be replaced if stretched or worn. A preventative replacement costs £1,500–£3,500 (engine-out job). A snapped chain almost always destroys the engine, requiring a £4,500–£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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Compare 630d Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit. We cover the 3.0-litre straight-six diesel specifically, with specialists who understand the N57 timing chain vulnerabilities, DPF and EGR maintenance requirements, and the improved B57 design.
UK Engine Replacement Services for 630d
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