BMW 3 Series 325d Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 3 Series 325d engine specialists. Compare prices on reconditioned, rebuilt and used engines for every generation of the 325d - from the E90 M57 through to the F30 N57 six-cylinder diesel.
Supply & Fit Available
12-Month Warranty
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100+ Suppliers
From £4,000 to £7,500
Used from £1,800 · Reconditioned from £3,500 · Common codes: M57D30U2, N57D30
From £1,800
Tested, bare/short engine
From £3,500
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 3 Series 325d Replacement Engineto Finding the Best BMW 3 Series 325d Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 3 Series 325d - Engine History & Specs at a Glance
The BMW 325d arrived in 2006 as a six-cylinder diesel positioned between the four-cylinder 320d and the range-topping 330d. Using a detuned version of the 330d's 3.0-litre straight-six, the 325d offered nearly all of the 330d's smoothness and torque at a lower price point. Over its production life, the 325d was powered by two generations of BMW six-cylinder diesel engines - the M57 and the N57 - each delivering effortless refinement and strong real-world performance.
Variant HistoryBMW 3 Series 325d - Engine History & Specs at a Glance
The BMW 325d arrived in 2006 as a six-cylinder diesel positioned between the four-cylinder 320d and the range-topping 330d. Using a detuned version of the 330d's 3.0-litre straight-six, the 325d offered nearly all of the 330d's smoothness and torque at a lower price point. Over its production life, the 325d was powered by two generations of BMW six-cylinder diesel engines - the M57 and the N57 - each delivering effortless refinement and strong real-world performance.
BMW 3 Series 325d
Fuel TypeDiesel
Engine Size2,993 cc
Power Output Range197-204 hp across the variant's historyEngine History Timeline
M57D30U2 (197 hp) 2,993 cc, six-cylinder turbo-diesel. Fitted to the E90 325d saloon and E91 325d Touring from launch.
M57D30U2 (197 hp) 2,993 cc. Extended to E92 325d Coupé and E93 325d Convertible.
N57D30 (204 hp) 2,993 cc. Introduced with the E90 LCI (Life Cycle Impulse) update, bringing improved efficiency and reduced emissions.
N57D30 (204 hp) 2,993 cc. Carried over into the F30 325d.
325d badge discontinued in the UK; replaced by the 320d with higher-output B47 engine delivering comparable performance with better fuel economy.
Key Specs Snapshot
Fuel TypeDieselEngine Size2,993 ccPower Output Range197-204 hp across the variant's historyYears Produced2006-2015Every engine fitted to the BMW 3 Series 325d is covered below, with UK rebuilt pricing and known failure points.
BMW 3 Series 325d Engine Codes - Specifications & Replacement CostBMW 3 Series 325d Engine Codes - Specifications & Replacement Cost
3.0-litre Diesel (2006-2010)
Power Output197 hpTorque400 NmYears Fitted2006-2010
Compatible Trim Levels
- 325d
- 325d SE
- 325d M Sport
- 325d xDrive
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,800-£3,200
Reconditioned
Addressed known issues, tested
£3,500-£5,500
Rebuilt
Full teardown, upgraded internals
£4,500-£6,500
Common Failure
Injector failure and swirl flap issues are known weaknesses on the M57. The swirl flaps in the inlet manifold can detach and enter the cylinders, causing catastrophic engine damage. Many specialists recommend swirl flap removal or replacement as a preventative measure. Timing chain issues are far less common than on BMW's four-cylinder diesel engines.
The BMW 3 Series 325d is powered by two generations of six-cylinder diesel engines - the M57 and the N57. Both are generally regarded as smooth, refined and durable units. However, they share some common weaknesses: injector failure, swirl flap issues (M57) and timing chain stretch (N57). Rebuilt engines supplied through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW 3 Series 325d N57 Wears Prematurely
Affected Vehicles
BMW 3 Series 325d (N57D30, 2010-2015)
Typical Failure Mileage
80,000-150,000 miles
Root Cause
The N57's timing chain is mounted at the rear of the engine, making it difficult to access and inspect. Chain stretch can lead to catastrophic failure if not addressed. Early warning signs include a metallic rattle on cold start.
Why It Happens
The N57's timing chain is mounted at the rear of the engine, making it difficult to access and inspect. Chain stretch can lead to catastrophic failure if not addressed. Early warning signs include a metallic rattle on cold start.
Dealer (parts + labour)
£2,000-£3,500
Specialist (parts + labour)
£1,500-£2,500
What it involves
Replace chain, tensioner and guides
Suitability
Best if caught early - before chain slip or breakage
1 - 2 daysDealer (parts + labour)
£6,500-£9,500
Specialist (parts + labour)
£5,500-£7,500 (matches Section 4's rebuilt figure for N57D30)
What it involves
Supply & fit, upgraded timing components, 12-month warranty
Suitability
When chain has snapped or engine is already damaged
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 |
|---|---|---|---|---|---|
 Timing chain replacement Minor | £2,000-£3,500 | £1,500-£2,500 | Replace chain, tensioner and guides | Best if caught early - before chain slip or breakage | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £6,500-£9,500 | £5,500-£7,500 (matches Section 4's rebuilt figure for N57D30) | Supply & fit, upgraded timing components, 12-month warranty | When chain has snapped or engine is already damaged | 1 - 2 days |
Our Recommendation
Our Recommendation
If you own an M57-powered BMW 3 Series 325d, have the swirl flaps inspected and consider preventative removal - it's a cheap insurance policy against catastrophic failure. For N57 owners, listen for cold-start rattle and have the timing chain inspected if you hear anything unusual. Both engines are fundamentally robust, but preventative maintenance is key to avoiding a full engine replacement.
Don't Let Engine Failure Write Off Your BMW 3 Series 325d
Whether you're dealing with M57 swirl flap failure, N57 timing chain stretch, or simply want to compare prices for a used or reconditioned BMW 3 Series 325d engine, EnginesMarket connects you with vetted UK specialists. Every rebuilt engine carries a minimum 12-month unlimited-mileage warranty with upgraded components addressing the original failure points. Compare quotes today and avoid main dealer premiums.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific BMW 3 Series 325d. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 3 Series 325d Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 3 Series 325d engine replacement cost-
A BMW 3 Series 325d engine replacement typically costs between £4,500 and £7,500 for a reconditioned six-cylinder unit, depending on the engine code (M57 or N57) and the supplier.
- Used BMW 3 Series 325d engines: £1,800-£4,000
- Reconditioned BMW 3 Series 325d engines: £3,500-£6,500
- Rebuilt BMW 3 Series 325d engines: £4,500-£7,500
Question 2Does the BMW 325d have timing chain issues-
The N57-powered BMW 3 Series 325d (2010-2015) can suffer from timing chain stretch, with the chain mounted at the rear of the engine. Early warning signs include a metallic rattle on cold start. The earlier M57 engine (2006-2010) is less prone to timing chain issues but has its own weaknesses - notably swirl flap failure.
-> Get your BMW 3 Series 325d timing chain inspectedQuestion 3Is it worth replacing the engine in a BMW 3 Series 325d-
It depends on the age and condition of your car. For an E90 325d worth under £5,000, a timing chain repair or used engine often makes more sense than a full rebuilt unit. For an F30 325d worth £8,000+, a reconditioned or rebuilt engine with warranty is a sound investment given the car's retained value.
-> Compare BMW 3 Series 325d engine pricesQuestion 4How long does a BMW 3 Series 325d engine replacement take-
A BMW 3 Series 325d engine replacement typically takes 12-16 labour hours for the six-cylinder M57 or N57 unit. With a specialist, this usually means 2-4 working days from drop-off to collection.
- Supply only: engine can be delivered next working day
- Supply & fit: allow 3-4 days for the complete job
Question 5What's the difference between the BMW 325d and 330d engine-
Both the BMW 325d and 330d use the same 3.0-litre six-cylinder diesel engine family (M57 or N57) - but the 325d is detuned.
- 325d: 197-204 hp depending on generation
- 330d: 231-258 hp depending on generation
- The 325d offers nearly all of the 330d's smoothness and torque at a lower purchase price and running cost
Question 6What are the common problems with the BMW 325d M57 engine-
The M57 engine in the BMW 3 Series 325d (2006-2010) is generally robust, but common issues include:
- Swirl flap failure - flaps can detach and enter cylinders
- Injector failure
- EGR valve clogging
- DPF issues on urban-driven cars
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Comparing quotes for your BMW 3 Series 325d engine replacement is free, quick and carries no obligation. Whether you need a used M57D30U2, a reconditioned N57D30 with upgraded timing components, or a rebuilt engine with full warranty, EnginesMarket connects you with vetted UK specialists who know BMW 3 Series 325d six-cylinder diesels inside out. Enter your registration above and get tailored quotes in minutes.
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