BMW 6 Series 620d Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 6 Series 620d engine specialists. Compare prices on reconditioned, rebuilt and used B47D20 engines for your G32 Gran Turismo.
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12-Month Warranty
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From £3,000 to £5,000
Used from £1,500 · Reconditioned from £2,800 · Common codes: B47D20, B47D20B
From £1,500
Tested, bare/short engine
From £2,800
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best BMW 6 Series 620d Replacement Engineto Finding the Best BMW 6 Series 620d Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 6 Series 620d - Engine History & Specs at a Glance
The BMW 620d Gran Turismo joined the G32 6 Series range in July 2018 as the entry-level diesel variant. Slotting in below the six-cylinder 630d, the 620d brought BMW's latest B47 four-cylinder diesel to the large executive liftback, offering a compelling blend of efficiency and refinement. The 620d remained in production through the G32's lifecycle until 2023.
Variant HistoryBMW 6 Series 620d - Engine History & Specs at a Glance
The BMW 620d Gran Turismo joined the G32 6 Series range in July 2018 as the entry-level diesel variant. Slotting in below the six-cylinder 630d, the 620d brought BMW's latest B47 four-cylinder diesel to the large executive liftback, offering a compelling blend of efficiency and refinement. The 620d remained in production through the G32's lifecycle until 2023.
BMW 6 Series 620d
Fuel TypeDiesel (later models: Mild-Hybrid diesel)
Engine Size Range2.0L (1,995cc)
Power Output Range163-190hp (120-140kW)Engine History Timeline
July 2018 - B47D20 2.0L four-cylinder turbo-diesel, 190hp, introduced as the entry-level 620d Gran Turismo
2020 - B47D20 (140kW / 190hp) fitted to 620d and 620d xDrive variants
July 2020 - B47D20B with mild-hybrid technology introduced 163hp or 190hp variants available
G32 6 Series Gran Turismo production ends
Key Specs Snapshot
Fuel TypeDiesel (later models: Mild-Hybrid diesel)Engine Size Range2.0L (1,995cc)Power Output Range163-190hp (120-140kW)Years Produced2018-2023Every engine fitted to the BMW 6 Series 620d is covered below, with UK rebuilt pricing and known failure points.
BMW 6 Series 620d Engine Codes - Specifications & Replacement CostBMW 6 Series 620d Engine Codes - Specifications & Replacement Cost
2.0L Four-Cylinder Turbo Diesel (2018-2020)
Power Output190hp (140kW) at 4,000rpmTorque400Nm (295lb ft) at 1,750-2,500rpmYears Fitted2018-2020
Compatible Trim Levels
- 620d SE
- 620d Sport
- 620d M Sport
- 620d xDrive
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,800
Reconditioned
Addressed known issues, tested
£2,800-£4,500
Rebuilt
Full teardown, upgraded internals
£3,800-£5,800
Common Failure
EGR cooler failure is a known issue on the B47D20, with internal coolant leaks into the exhaust stream. Timing chain wear is far less frequent than the older N47 engine, but DPF clogging remains a concern for urban-driven examples.
The BMW 6 Series 620d is powered by the B47D20 family of 2.0-litre four-cylinder turbo-diesel engines - BMW's modern replacement for the earlier N47. While significantly more reliable than its predecessor, the B47 is not without its weaknesses. Rebuilt B47D20 engines through EnginesMarket include upgraded EGR and cooling system components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW 6 Series 620d B47D20 Suffers Coolant Leaks
Affected Vehicles
BMW 6 Series 620d (B47D20, 2018-2023)
Typical Failure Mileage
60,000-120,000 miles
Root Cause
The EGR cooler can fail internally, allowing coolant to leak into the exhaust stream. This mixture of coolant, hot exhaust gases, and soot leads to excessive carbon buildup and, in severe cases, can pose a fire risk. BMW issued technical campaigns addressing this issue across the B47, N47 and N57 engine families.
Why It Happens
The EGR cooler can fail internally, allowing coolant to leak into the exhaust stream. This mixture of coolant, hot exhaust gases, and soot leads to excessive carbon buildup and, in severe cases, can pose a fire risk. BMW issued technical campaigns addressing this issue across the B47, N47 and N57 engine families.
Dealer (parts + labour)
£800-£1,500
Specialist (parts + labour)
£500-£900
What it involves
Replace EGR cooler, clean EGR valve, reset adaptations
Suitability
Effective if caught early before secondary damage
1 - 2 daysDealer (parts + labour)
£900-£1,600
Specialist (parts + labour)
£500-£1,000
What it involves
Forced DPF regeneration, EGR system cleaning, sensor replacement
Suitability
Necessary if EGR failure has caused DPF clogging
1 - 2 daysDealer (parts + labour)
£5,000-£7,500
Specialist (parts + labour)
£3,800-£5,800 (matches Section 4 rebuilt figure)
What it involves
Supply & fit, upgraded EGR components, 12-month warranty
Suitability
Only if EGR failure has caused catastrophic damage
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 EGR cooler replacement Minor | £800-£1,500 | £500-£900 | Replace EGR cooler, clean EGR valve, reset adaptations | Effective if caught early before secondary damage | 1 - 2 days |
 DPF clean / full emissions service Best Value | £900-£1,600 | £500-£1,000 | Forced DPF regeneration, EGR system cleaning, sensor replacement | Necessary if EGR failure has caused DPF clogging | 1 - 2 days |
Full Replacement - rebuilt/reconditioned engine Best Value | £5,000-£7,500 | £3,800-£5,800 (matches Section 4 rebuilt figure) | Supply & fit, upgraded EGR components, 12-month warranty | Only if EGR failure has caused catastrophic damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical BMW 6 Series 620d currently values between £15,000 and £24,000 depending on mileage, condition, and trim level. With average values around £16,000-£20,000, a full rebuilt engine at £3,800-£5,800 represents 20-35% of the vehicle's value - comfortably within the "safe" threshold. For higher-mileage examples approaching £15,000, a reconditioned engine or targeted EGR repair may offer better value.
Our Recommendation
Our Recommendation
If your 620d is showing EGR-related warning lights or coolant loss without visible external leaks, have the EGR cooler inspected immediately. A specialist EGR cooler replacement at £500-£900 is significantly cheaper than a full engine replacement and addresses the root cause. Only consider a full rebuilt engine if the EGR failure has caused secondary damage to the DPF, turbo, or injectors.
Don't Let Engine Failure Write Off Your BMW 6 Series 620d
The B47D20 is a significant improvement over the older N47 diesel, with the timing chain relocated to the front of the engine for better durability and serviceability. But EGR cooler failure and DPF clogging can still catch owners out. A rebuilt B47D20 engine through EnginesMarket comes with upgraded components addressing the original failure points, a minimum 12-month unlimited-mileage warranty, and nationwide delivery or supply & fit options. Compare specialist quotes today - it costs nothing and could save you thousands vs dealer prices.
Compare rebuilt B47D20 BMW 6 Series 620d engine prices
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Important Information
BMW 6 Series 620d Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 6 Series 620d engine replacement cost-
A BMW 6 Series 620d engine replacement typically costs £1,500-£2,800 for a used B47D20 unit, £2,800-£4,500 for a reconditioned engine, and £3,800-£5,800 for a fully rebuilt engine with warranty. Supply & fit adds £520-£780 in specialist labour (8-12 hours).
- Used engines: lowest upfront cost, limited warranty
- Reconditioned: mid-range, some new parts fitted
- Rebuilt: highest cost, fully restored to factory spec with 12-month warranty
Question 2What are the signs of EGR cooler failure in a BMW 6 Series 620d-
Common symptoms include coolant loss without visible external leaks, increased exhaust smoke, decreased fuel efficiency, and EGR-related fault codes. In advanced cases, the engine may overheat or show a coolant warning light. If you suspect EGR cooler failure, have it inspected immediately - internal coolant leaks can cause serious engine damage.
- Coolant loss: first warning sign
- Increased exhaust smoke: coolant entering exhaust
- Reduced fuel economy: EGR system compromised
Question 3Is it worth replacing the engine in a BMW 6 Series 620d-
With average values of £16,000-£20,000, a full rebuilt engine at £3,800-£5,800 represents 20-35% of the vehicle's value - making replacement financially viable for most examples. If your 620d is in good condition with reasonable mileage, a rebuilt engine can extend its life by 150,000+ miles.
- Sub-£15,000 car: consider a used engine or targeted repair
- £15,000-£20,000 car: reconditioned engine is viable
- £20,000+ car: rebuilt engine with warranty makes strong financial sense
Question 4How long does a BMW 6 Series 620d engine replacement take-
A typical BMW 6 Series 620d engine replacement takes 2-4 days for supply and fit at a specialist garage. The B47D20 is a four-cylinder unit with reasonable engine bay access, but the G32's complex electronics and xDrive variants add labour time. Most specialists offer collection/delivery options nationwide.
- Same-day dispatch available for in-stock engines
- Fitting typically completed within 3 working days
- Collection/delivery options available across the UK
Question 5What's the difference between the BMW 620d and 630d engines-
The 620d uses the 2.0L B47D20 four-cylinder diesel (190hp, 400Nm), while the 630d uses the 3.0L B57D30 six-cylinder diesel (261hp, 620Nm). The 620d offers better fuel economy (up to 58.9mpg) and lower running costs, but the 630d delivers significantly more torque and a smoother, more refined driving experience.
- 620d: 2.0L four-cylinder, 190hp, 400Nm torque
- 630d: 3.0L six-cylinder, 261hp, 620Nm torque
- 620d replacement cost: £1,500-£5,800 vs 630d: higher
Question 6Are BMW 6 Series 620d engines reliable-
The B47D20 is considered significantly more reliable than the older N47 diesel. BMW relocated the timing chain to the front of the engine, addressing the N47's notorious chain failure issue. However, EGR cooler failure and DPF clogging remain common concerns, particularly on vehicles used mainly for short urban journeys.
- Timing chain: far less prone to failure than N47
- Regular motorway driving: essential for DPF health
- EGR cooler inspection: recommended every 60,000 miles
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