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BMW N47D20C Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The N47D20C is the 2.0-litre diesel fitted to most 2010-2015 BMW diesels - from the 116d to the 520d - with reconditioned units from £3,200 . It generated 1,450 UK replacement requests in 2025 , more than any other engine on EnginesMarket.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,800
Reconditioned from
£3,200
Rebuilt from
£4,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
BMW N47D20C - Specifications at a Glance
Engine Code
N47D20C
Fuel
Diesel
Configuration
2.0L inline-4, common-rail turbo
Power Output(s)
116-184hp depending on tune (163hp and 184hp most common in the UK)
Years Produced
2009-2015
UK Models Fitted
11 BMW model lines across 1, 2, 3, 4, 5 Series, X1 and X3 - full list in Compatibility below
2025 UK Replacement Requests
1,450
Replaced
N47D20A
Replaced By
B47D20A
Most Common Failure
Rear-mounted timing chain stretch and tensioner wear
Reconditioned Price Range
£3,200-£5,500 supply-only
Vetted UK specialists for N47D20C replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the N47D20C-
The N47D20C is one of the most widely fitted diesel engines BMW has ever produced in the UK - the 320d and 520d it powered were the best-selling versions of the best-selling BMWs of their era, which is exactly why it leads our replacement request data.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW 1 Series | E81/E87 (LCI) | 116d, 118d, 120d | 2009-2011 | |
| BMW 1 Series | F20/F21 | 116d, 118d, 120d | 2011-2015 | |
 BMW 2 Series | F22 | 218d, 220d | 2014-2015 | |
 BMW 3 Series | E90/E91/E92/E93 (LCI) | 316d, 318d, 320d, 320d EfficientDynamics | 2010-2013 | |
| BMW 3 Series | F30/F31/F34 | 316d, 318d, 320d | 2012-2015 | |
 BMW 4 Series | F32/F33/F36 | 418d, 420d | 2013-2015 | |
 BMW 5 Series | E60/E61 (late) | 520d | 2009-2010 | |
| BMW 5 Series | F10/F11/F07 | 518d, 520d, 520d EfficientDynamics | 2010-2014 | |
 BMW X1 | E84 | sDrive18d, sDrive20d, xDrive20d | 2010-2015 | |
 BMW X3 | E83 (late) | xDrive18d, xDrive20d | 2009-2010 | |
| BMW X3 | F25 | sDrive18d, xDrive20d | 2011-2014 |
02
BMW 1 Series
03
BMW 2 Series
04
BMW 3 Series
Generation/Chassis
E90/E91/E92/E93 (LCI)
Badge(s)
316d, 318d, 320d, 320d EfficientDynamics
Years
2010-2013
Link
05
BMW 3 Series
06
BMW 4 Series
07
BMW 5 Series
08
BMW 5 Series
Generation/Chassis
F10/F11/F07
Badge(s)
518d, 520d, 520d EfficientDynamics
Years
2010-2014
Link
09
BMW X1
10
BMW X3
11
BMW X3
CROSS-BRAND
N47D20C is documented across 11 BMW applications spanning 1 Series, 2 Series, 3 Series, 4 Series, 5 Series, X1, X3. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which engine your car has- Enter your registration above - we'll confirm your exact N47D20C fitment before any quotes are sent.
Prices
BMW N47D20C Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,800-£3,200 | £2,450-£4,110 | 3-6 months |
Reconditioned | £3,200-£5,500 | £3,850-£6,410 | 12-24 months |
Rebuilt | £4,500-£6,500 | £5,150-£7,410 | 12-24 months |
Supply-only prices . Fitted = supply price plus the labour band above.
Labour Guide
Fitting an N47D20C typically takes 10-14 hours at £650-£910 total labour - the rear-mounted timing chain means engine-out access, which is why labour on this unit runs higher than front-chain designs. Confirm exact labour when comparing quotes.
Price Factors
What moves the price on an N47D20C is almost entirely the timing chain: a used unit with no documented chain history is priced low for a reason, while a reconditioned or rebuilt unit with the chain, guides and tensioner already renewed carries most of its premium in exactly that work.
Tune level (163hp vs 184hp) affects donor availability more than price. For the wider market picture, see our reconditioned engine cost guide.
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Common Problems
BMW N47D20C Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the N47D20C, based on real-world data and verified failure patterns.
Verified issue focus: Rear-mounted timing chain stretch and tensioner wear.
1. Timing Chain Stretch & Tensioner Failure
1. Timing Chain Stretch & Tensioner Failure
Typical onset:
60,000-120,000 miles
What happens:
The N47's timing chain is mounted at the rear of the engine, against the gearbox. As the chain stretches and the tensioner wears, the first symptom is a metallic rattle on cold start; left unaddressed, the chain can jump or snap, putting valves into pistons and destroying the engine. Because the chain sits at the back, even a preventative replacement means removing the engine or gearbox - chain replacement alone runs £650-£1,800, and a full engine after catastrophic failure runs £2,500-£6,500 .
Repair vs replace:
Caught early - rattle only, no metal in the oil - a chain kit is the right call and far cheaper than a unit. Once the chain has jumped or let go, internal damage almost always means a replacement engine is the economical route; piecemeal head-and-piston repair on this engine rarely beats a rebuilt unit on price.
Read more about this issue
2. EGR Valve & Cooler Carbon Build-Up
2. EGR Valve & Cooler Carbon Build-Up
Typical onset:
80,000+ miles, earlier on short-trip cars
What happens:
Like most Euro 5 diesels of its era, the N47D20C's EGR system carbons up, causing rough running, limp mode and - where the cooler leaks - coolant loss into the intake. It's a repair-level issue rather than an engine-killer, but on a car already facing chain work it often tips the maths toward a fully reconditioned unit with the EGR system addressed at the same time.
Repair vs replace:
On its own, an EGR clean or replacement is a sensible standalone repair. It becomes a replacement argument only in combination with chain wear or turbo trouble.
Read more about this issue
3. Turbocharger Wear
3. Turbocharger Wear
Typical onset:
100,000+ miles
What happens:
Bearing wear and actuator faults show as whistle, smoke or lost boost. Not unusually frequent for the class, but worth checking on any used donor engine - a tired turbo on a used unit erodes the price advantage quickly.
Repair vs replace:
A turbo alone is a repair. On a used replacement engine, insist on evidence the turbo was inspected.
Read more about this issue
BMW revised the chain components during the N47's life, and the later B47 relocated the chain to the front of the engine entirely - but no N47D20C production year is considered free of the chain risk; specialist consensus is to treat chain history, not model year, as the deciding factor on this engine .
Compare rebuilt N47D20C prices with the timing chain already addressed
Engine Variants
How to Confirm You Have the N47D20C
The engine code is stamped on the block - on the N47 it sits on the front face of the crankcase below the cylinder head - and appears in your service records; your V5C lists engine capacity but not the code itself, so a registration lookup or VIN check is the reliable route. Enter your reg above and we'll confirm the exact unit before any quote goes out.
If a supplier quotes you an "N47" without the full suffix, ask for it - the suffix is the difference between a bolt-in replacement and an expensive mismatch.
Easily Confused
N47D20A
2007-2010 - the original version, fitted to earlier 118d/318d/520d models. Not a straight swap: fuel injection components and electronic controls differ, and a swap typically needs loom, mount and ECU work. Early N47D20C blocks up to roughly 2011 share near-identical castings with the A and have been used as replacements for it, while later C blocks have different water pump and oil filter housing openings.
Alternative / Next-Gen Code
N47D20D
The 204hp+ twin-turbo high-output version (123d/125d/x25d). Different turbo hardware and internals; never interchangeable with the C despite the near-identical name.
Related JLR Variants
B47D20A
2014 onward - the successor, not a variant. Front-mounted chain, different architecture; it does not retrofit into an N47 car.
Confirm the exact N47D20C fitment
If a supplier quotes you an "N47" without the full suffix, ask for it - the suffix is the difference between a bolt-in replacement and an expensive mismatch.
Buying Guide
Buying a Replacement N47D20C - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used N47D20C from £1,800 only makes sense with documented timing chain history - on this engine specifically, an undocumented used unit is a gamble on the exact component that killed the one you're replacing. It suits lower-value hosts where a reconditioned unit would exceed the car's worth.
Reconditioned:
The sweet spot for most N47D20C buyers. A proper recon addresses the chain, guides, tensioner and - done well - the EGR cooler in the same build, which is precisely the failure set from Section 5. At £3,200-£5,500 with a 12-24 month warranty, it removes the engine's defining risk rather than inheriting it.
Rebuilt:
Justified where the host car is worth keeping long-term. A full rebuild at £4,500-£6,500 should include the complete chain kit with revised tensioner, injector attention, and a turbo inspection as standard; ask any quote to itemise those three.
Supply & Fit Line:
Every option is available supply-only or fully fitted through our vetted UK network, with a minimum 12-month warranty and nationwide delivery - see supply and fit.
Vehicle Value Note:
Be honest about the host before committing. Typical N47D20C hosts span roughly £1,500 for an early E87 to £14,000 for a late F30 . On E87, E90, E60 and E83 cars - most now worth under £4,000-£5,000 - a reconditioned unit at £3,200+ frequently approaches or exceeds the car's value, and evaluating scrap or a used unit first is the honest advice. F20, F30, F10 and F25 hosts generally still justify reconditioned or rebuilt spend.
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Related Engines
Engines Related to the BMW N47D20C
Explore engines that are closely related to the BMW N47D20C, including its predecessor, successor, and key family variants.
Predecessor
N47D20A
The original 2007-2010 version with the highest documented chain failure rate of the whole family; if your car is a pre-2010 118d/318d/520d, that page is the one you need.
Successor
B47D20A
The 2014-onward replacement that moved the timing chain to the front of the engine, largely resolving the N47's defining weakness; owners of 2015+ diesels are usually on a B47 without realising it.
Sibling
N47D20D
The twin-turbo high-output version fitted to the 123d, 125d and x25d models; different turbo hardware, different price bracket, not interchangeable with the C.
Sibling
N47D16
The 1.6-litre version fitted to the 114d and entry 116d; if your 116d is a 2012-on 1.6, your engine is on that page, not this one.
Sibling
N57D30A
The six-cylinder 3.0d from the same era (330d/530d), sharing the rear-chain design and its access costs; relevant if you're weighing a 520d against a 530d purchase.
FAQ
BMW N47D20CFrequently Asked Questions
Question 1How much does a BMW N47D20C engine replacement cost-
A reconditioned N47D20C costs £3,200-£5,500 supply-only, with fitting adding £650-£910 for the 10-14 hour job .
- Used units run £1,800-£3,200; rebuilt £4,500-£6,500
- Labour is higher than average because the rear chain means engine-out access
Question 2What is the most common N47D20C failure-
Timing chain stretch and tensioner wear, typically appearing between 60,000 and 120,000 miles as a metallic rattle on cold start .
- The chain is rear-mounted, so even preventative replacement is labour-heavy (£650-£1,800)
- Ignored, a jumped chain destroys the engine - full replacement then runs £2,500-£6,500
Question 3Which BMW models use the N47D20C engine-
It powered most 2010-2015 BMW four-cylinder diesels: 1, 2, 3, 4 and 5 Series plus the X1 and X3, in badges from 116d to 520d.
- Highest-volume applications: 320d (E90 LCI/F30) and 520d (F10)
- Full generation-by-generation table above
Question 4Should I buy a used or reconditioned N47D20C-
For most owners, reconditioned - a proper recon renews the chain, guides and tensioner, which is exactly what fails on this engine.
- Used only makes sense with documented chain history, or on hosts worth under about £4,000
- Rebuilt is worth the premium on cars you're keeping long-term
Question 5How do I know if my car has the N47D20C and not the N47D20A-
Broadly by year - the C ran from late 2009 to 2015, the A from 2007 to 2010 - but the only reliable confirmation is the code itself, via a registration or VIN lookup.
- The two are not a straight swap: injection and electronic components differ
- Early C blocks differ again from later C blocks in water pump and oil housing fitment
Question 6How long does an N47D20C last-
With the chain addressed, the bottom end is genuinely durable - well-maintained units routinely pass 200,000 miles; the chain is the gatekeeper, not the block .
- Oil changes to BMW LL-04 spec at sensible intervals are the single best protection
- Any cold-start rattle should be inspected immediately, whatever the mileage
Compare BMW N47D20C Engine Prices Today
The N47D20C generated more UK replacement requests than any other engine in 2025 - which means our network quotes on this exact unit daily, and knows precisely what a properly done chain kit looks like. Comparing is free and carries no obligation; your registration confirms the exact fitment before a single quote goes out. With reconditioned N47D20C units from £3,200, two minutes of comparing can save four figures against a dealer exchange.
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Vetted UK specialists for N47D20C replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
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