01
BMW N57D30B Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The high-output 3.0-litre inline-six diesel (313hp/230kW) fitted to BMW’s 335d, 535d, X5 xDrive35d, and 740d models. Reconditioned N57D30B units typically start from £4,500 , backed by 830 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,500
Reconditioned from
£4,500
Rebuilt from
£6,000
GB
Secure enquiry - no spam.
Quotes only from vetted UK engine specialists.
Key Specs
BMW N57D30B - Specifications at a Glance
Engine Code
N57D30B
Fuel
Diesel
Configuration
3.0L inline-6, twin-turbo
Power Output(s)
230 kW (313 hp)
Years Produced
2012-2016
UK Models Fitted
5+ BMW models - full list in Compatibility below
2025 UK Replacement Requests
830
Replaced
M57D30
Replaced By
B57D30B
Most Common Failure
Rear-mounted timing chain stretch and turbocharger wear
Reconditioned Price Range
£4,500-£7,000 supply-only
Vetted UK specialists for N57D30B replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the N57D30B-
TAG: Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW 3 Series | F30 | 335d | 2013-2016 | |
 BMW 5 Series | F10 | 535d | 2012-2016 | |
| BMW X5 | F15 | xDrive35d | 2013-2016 | |
| BMW X6 | F16 | xDrive35d | 2014-2016 | |
| BMW 7 Series | F01 | 740d | 2012-2015 |
02
BMW 5 Series
03
BMW X5
04
BMW X6
05
BMW 7 Series
CROSS-BRAND
N57D30B is documented across 5 BMW applications spanning BMW 3 Series, BMW 5 Series, BMW X5, BMW X6, BMW 7 Series. 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 N57D30B fitment before any quotes are sent.
Prices
BMW N57D30B Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,500-£4,500 | £3,280-£5,540 | 3-6 months |
Reconditioned | £4,500-£7,000 | £5,280-£8,040 | 12-24 months |
Rebuilt | £6,000-£9,000 | £6,780-£10,040 | 12-24 months |
The final cost of a BMW N57D30B engine replacement is heavily influenced by the condition of the twin-turbo setup and whether the rear-mounted timing chain has been proactively addressed. Units sourced with documented turbo and chain replacements command a premium but offer significantly lower near-term risk. For a complete breakdown of how these factors impact your final invoice, see our full reconditioned engine cost guide .
Labour Guide
Fitting an N57D30B typically takes 12-16 hours at £65-£85/hr (independent) - confirm exact labour when comparing quotes.
Price Factors
Ready to compare N57D30B quotes?
Get competitive quotes from trusted UK specialists today.
Common Problems
BMW N57D30B Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the N57D30B, based on real-world data and verified failure patterns.
Verified issue focus: Rear-mounted timing chain stretch and turbocharger wear.
1. Timing Chain Stretch (Rear-Mounted)
1. Timing Chain Stretch (Rear-Mounted)
Typical onset:
80k-120k miles
What happens:
Like its predecessor, the N57D30B features a rear-mounted timing chain. Over time, the chain can stretch and the tensioner can fail, leading to a distinct rattling noise on cold starts. If ignored, the chain can jump teeth or snap, causing catastrophic valve-to-piston contact.
Repair vs replace:
A revised timing chain kit replacement is highly cost-effective if caught at the first sign of noise. If the chain has already failed, a full N57D30B engine replacement is the only safe remedy.
Read more about this issue
2. Turbocharger Wear (Twin-Turbo Setup)
2. Turbocharger Wear (Twin-Turbo Setup)
Typical onset:
90k-140k miles
What happens:
The high-output nature of the N57D30B places significant stress on its twin-turbocharging system. Turbo seals can degrade, leading to oil consumption, blue exhaust smoke, and eventual loss of boost pressure.
Repair vs replace:
Early detection may allow for a standalone turbo rebuild or replacement. However, if turbo failure has caused oil starvation or debris ingestion into the intercooler and engine, a reconditioned N57D30B is the most reliable long-term solution.
Read more about this issue
3. Oil Pump and Crankshaft Bearing Issues
3. Oil Pump and Crankshaft Bearing Issues
Typical onset:
100k+ miles
What happens:
Higher-mileage N57D30B units have documented reports of oil pump wear and subsequent crankshaft bearing issues. This manifests as low oil pressure warnings and, in severe cases, a knocking sound from the bottom end.
Repair vs replace:
Addressing oil pump wear requires significant engine disassembly. If crankshaft bearings are damaged, the engine block is often compromised, making a full rebuild or replacement the only viable option.
Read more about this issue
While the N57D30B is generally more robust than early N57 variants, the rear-mounted chain design remains an inherent vulnerability. Strict adherence to shortened oil change intervals (5,000-7,000 miles) is the most effective documented method to delay these failures .
Compare rebuilt N57D30B prices with the failure already addressed
Engine Variants
How to Confirm You Have the N57D30B
The N57D30B engine code is stamped directly onto the engine block, typically visible on a machined pad near the oil filter housing, or listed on the vehicle’s VIN plate located under the bonnet. It is most commonly confused with the lower-output N57D30A (typically 258hp) or the later N57D30C (381hp tri-turbo).
Not sure which engine your car has- Enter your registration above - we'll confirm your exact N57D30B fitment before any quotes are sent.
Easily Confused
M57D30
- The M57 it replaced was BMW's first modern inline-six diesel; the N57D30B added twin-turbocharging and significantly more power but inherited the rear-mounted timing chain vulnerability.
Alternative / Next-Gen Code
B57D30B
- The B57D30B resolved the N57's biggest weakness by moving the timing chain to the front of the engine and is considered significantly more reliable overall.
Related JLR Variants
N57D30A
- The lower-output 258hp single-turbo variant of the same N57 family; if your car is badged 30d rather than 35d, this is the page you need.
Confirm the exact N57D30B fitment
Not sure which engine your car has- Enter your registration above - we'll confirm your exact N57D30B fitment before any quotes are sent.
Buying Guide
Buying a Replacement N57D30B - 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 N57D30B is a viable option only if it comes with documented, timestamped proof of a recent rear timing chain and turbocharger replacement. Given the high performance and known failure points of this engine, the risk of hidden bottom-end wear makes unverified used N57D30B engines a false economy.
Reconditioned:
The recommended choice for most N57D30B owners. A proper reconditioning process replaces the failure-prone rear timing chain kit, refurbishes or replaces the twin-turbo setup, and installs new oil pump components, directly addressing the engine's known failure points while retaining the original, sound engine block.
Rebuilt:
A full rebuild is justified if the host vehicle is a low-mileage, high-value example you plan to keep long-term. An upgraded rebuild should include balanced crankshaft verification, new piston rings, and upgraded bearings to prevent future oil pressure issues and maximise longevity.
Supply & Fit Line:
Booking supply and fit through our network ensures the replacement N57D30B is installed by specialists familiar with BMW's complex inline-six diesel architecture, backed by a nationwide warranty and post-installation ECU coding.
Vehicle Value Note:
The N57D30B is typically found in premium BMW models (335d, 535d, X5 xDrive35d) valued between £8,000 and £25,000 . While replacement is generally flagged as Safe relative to vehicle value, older, higher-mileage examples approaching the £8,000 mark should be carefully evaluated. If the lowest viable replacement cost exceeds approximately 60% of the vehicle's current market value, evaluate scrap value before committing.
Compare N57D30B Engine Prices Now
Related Engines
Engines Related to the BMW N57D30B
Explore engines that are closely related to the BMW N57D30B, including its predecessor, successor, and key family variants.
Predecessor
M57D30
- The M57 it replaced was BMW's first modern inline-six diesel; the N57D30B added twin-turbocharging and significantly more power but inherited the rear-mounted timing chain vulnerability.
Successor
B57D30B
- The B57D30B resolved the N57's biggest weakness by moving the timing chain to the front of the engine and is considered significantly more reliable overall.
Sibling
N57D30A
- The lower-output 258hp single-turbo variant of the same N57 family; if your car is badged 30d rather than 35d, this is the page you need.
Sibling
N57D30C
- The 381hp tri-turbo performance variant found in the 550d and M550d; shares the block but has a fundamentally different turbo and fuel system setup.
Sibling
N57S
- The M Performance derivative of the N57 family, tuned for the X5M and X6M diesel applications; not a straight swap with the N57D30B.
FAQ
BMW N57D30BFrequently Asked Questions
Question 1How much does a BMW N57D30B engine replacement cost-
A reconditioned BMW N57D30B engine typically costs between £4,500 and £7,000 for supply only, or £5,280 to £8,040 fully fitted by an independent specialist. Prices vary based on whether the twin-turbo setup and rear timing chain have been addressed in the reconditioning process. Labour typically adds 12-16 hours of workshop time due to the engine's complexity and rear chain location.
- Prices vary based on whether the twin-turbo setup and rear timing chain have been addressed in the reconditioning process.
- Labour typically adds 12-16 hours of workshop time due to the engine's complexity and rear chain location.
Question 2What is the most common BMW N57D30B engine problem-
The most documented failure is rear-mounted timing chain stretch, typically occurring between 80,000 and 120,000 miles, compounded by twin-turbocharger wear on higher-mileage units. Symptoms include a rattling noise on cold starts and eventual timing correlation faults. Because the chain is rear-mounted, replacement requires engine removal, making it a labour-intensive repair.
- Symptoms include a rattling noise on cold starts and eventual timing correlation faults.
- Because the chain is rear-mounted, replacement requires engine removal, making it a labour-intensive repair.
Question 3Which BMW models use the N57D30B engine-
The BMW N57D30B is fitted to performance-oriented diesel models including the 3 Series 335d (F30), 5 Series 535d (F10), X5 xDrive35d (F15), X6 xDrive35d (F16), and 7 Series 740d (F01). It was produced from 2012 to 2016 as the high-output twin-turbo variant of the N57 inline-six family. Always verify your exact engine code, as the lower-output N57D30A and higher-output N57D30C share the same badge range.
- It was produced from 2012 to 2016 as the high-output twin-turbo variant of the N57 inline-six family.
- Always verify your exact engine code, as the lower-output N57D30A and higher-output N57D30C share the same badge range.
Question 4Should I buy a used or reconditioned N57D30B engine-
A reconditioned BMW N57D30B is strongly recommended over a used unit due to the known rear timing chain and twin-turbo failure points. A proper reconditioning process replaces the chain kit, refurbishes the turbos, and addresses oil pump wear. Used units rarely come with documented proof that these critical, labour-intensive repairs have been performed.
- A proper reconditioning process replaces the chain kit, refurbishes the turbos, and addresses oil pump wear.
- Used units rarely come with documented proof that these critical, labour-intensive repairs have been performed.
Question 5How do I confirm my car has the N57D30B engine code-
You can confirm your engine code by checking the VIN plate under the bonnet, reviewing your V5C registration document, or looking for the code stamped on the engine block near the oil filter housing. It is commonly confused with the N57D30A (258hp single-turbo) or the N57D30C (381hp tri-turbo). Fitting the wrong revision can lead to ECU incompatibility, incorrect turbo mapping, and mounting misalignment.
- It is commonly confused with the N57D30A (258hp single-turbo) or the N57D30C (381hp tri-turbo).
- Fitting the wrong revision can lead to ECU incompatibility, incorrect turbo mapping, and mounting misalignment.
Compare BMW N57D30B Engine Prices Today
Get a free, no-obligation comparison of BMW N57D30B engine prices today. Our network provides quotes specific to your exact engine code, and our registration lookup confirms your vehicle's fitment before any quotes are sent. With reconditioned N57D30B units from £4,500, comparing takes two minutes and could save four figures on your replacement.
Vetted UK Specialists
Vetted UK specialists for N57D30B replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
Expert Support
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
Get Free N57D30B Engine Quotes