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BMW B57D30A Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 3.0-litre inline-six diesel powering most modern BMW 30d models, with reconditioned units from £5,000 . This engine generated 460 UK replacement requests in 2025 , reflecting its widespread use and strong retained demand across the G-Series lineup.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,800
Reconditioned from
£5,000
Rebuilt from
£7,000
GB
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Key Specs
BMW B57D30A - Specifications at a Glance
Engine Code
B57D30A
Fuel
Diesel
Configuration
3.0L inline-6, single turbo
Power Output(s)
~265 hp (195 kW) / 620 Nm
Years Produced
2015-Present
UK Models Fitted
6+ BMW models - full list in Compatibility below
2025 UK Replacement Requests
460
Replaced
N57D30
Replaced By
B57TU2 (Technical Update variants)
Most Common Failure
Coolant expansion tank leaks / DPF clogging
Reconditioned Price Range
£5,000-£8,000 supply-only
Vetted UK specialists for B57D30A replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the B57D30A-
The B57D30A is the foundational "30d" tune of BMW's modular B57 engine family. It has been widely fitted across the G-Series saloon, estate, and SUV lineup since 2015, becoming the default choice for buyers seeking a balance of performance and efficiency.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW 3 Series | G20 / G21 | 330d, 330d xDrive | 2019-Present | |
 BMW 5 Series | G30 / G31 | 530d, 530d xDrive | 2017-Present | |
 BMW X3 | G01 | xDrive30d | 2017-Present | |
 BMW X4 | G02 | xDrive30d | 2018-Present | |
| BMW X5 | G05 | xDrive30d | 2018-Present | |
| BMW 7 Series | G11 / G12 | 730d, 730Ld | 2015-2022 |
02
BMW 5 Series
03
BMW X3
04
BMW X4
05
BMW X5
06
BMW 7 Series
CROSS-BRAND
B57D30A is documented across 6 BMW applications spanning 3 Series, 5 Series, X3, X4, X5, 7 Series. Registration lookup confirms the exact suffix before quotes are sent.
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Not sure which engine your car has- Enter your registration above - we'll confirm your exact B57D30A fitment before any quotes are sent.
Prices
BMW B57D30A Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,800-£5,000 | £3,580-£6,040 | 3-6 months |
Reconditioned | £5,000-£8,000 | £5,780-£9,040 | 12-24 months |
Rebuilt | £7,000-£10,500 | £7,780-£11,540 | 12-24 months |
The replacement cost for a B57D30A is heavily influenced by whether the turbocharger and EGR system require simultaneous replacement, and if the DPF has been regularly serviced. Because this engine is significantly more reliable than its N57 predecessor, finding a low-mileage used unit or a properly reconditioned example is highly viable. For a complete breakdown of labour and parts, see our full reconditioned engine cost guide.
Labour Guide
Fitting a B57D30A typically takes 12-16 hours at £65-£85/hr (independent) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
BMW B57D30A Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the B57D30A, based on real-world data and verified failure patterns.
Verified issue focus: Coolant expansion tank leaks / DPF clogging.
1. Coolant System Leaks (Expansion Tank & Hoses)
1. Coolant System Leaks (Expansion Tank & Hoses)
Typical onset:
60k-100k miles
What happens:
Plastic coolant expansion tanks and associated hose fittings can become brittle over time, leading to slow coolant loss. If ignored, this can cause the engine to overheat, potentially warping the cylinder head or damaging the head gasket.
Repair vs replace:
A straightforward repair. Replacing the expansion tank and inspecting all coolant hoses is far cheaper than a full B57D30A engine replacement.
Read more about this issue
2. DPF & EGR Clogging (Urban Use)
2. DPF & EGR Clogging (Urban Use)
Typical onset:
80k-120k miles
What happens:
Vehicles predominantly used for short, urban journeys fail to reach the exhaust temperatures required for active DPF regeneration. This leads to soot accumulation, restricted exhaust flow, and potential limp mode or reduced performance.
Repair vs replace:
Professional DPF cleaning or forced regeneration often resolves the issue. Only in cases of severe, long-term neglect does the DPF require full replacement, which is still more cost-effective than a full engine swap.
Read more about this issue
The B57D30A is considered significantly more reliable than the older N57D30, particularly regarding timing chain durability. The chain was moved to the front of the engine, eliminating the catastrophic rear-chain failure risk that plagued earlier BMW diesels .
Compare rebuilt B57D30A prices with the failure already addressed
Engine Variants
How to Confirm You Have the B57D30A
The B57D30A is a Specific engine code, primarily denoting the base 265hp "30d" tune of the 3.0-litre B57 inline-six diesel family. It is commonly confused with the higher-output B57D30B (found in some 30d/40d tunes producing ~286hp) or the B57D30C (M50d/M40d variants producing 320hp+).
Not sure- Enter your registration above, and our system will instantly confirm if your vehicle is equipped with the B57D30A before matching you with suppliers.
Easily Confused
N57D30A
- The N57D30A it replaced suffered from rear-mounted timing chain stretch and turbocharger wear, catastrophic risks that the front-chain B57D30A architecture largely resolved.
Alternative / Next-Gen Code
B57D30B
- A higher-output tune of the same 3.0L inline-six architecture, often found in later G-Series models or specific market trims; it shares the same core block and general failure profile but features different ECU mapping.
Related JLR Variants
B57D30C
- The twin-turbo or higher-output M-Performance derivative (e.g., M50d), which introduces different turbo plumbing and cooling requirements, making it a non-straight swap for the single-turbo B57D30A.
Confirm the exact B57D30A fitment
Not sure- Enter your registration above, and our system will instantly confirm if your vehicle is equipped with the B57D30A before matching you with suppliers.
Buying Guide
Buying a Replacement B57D30A - 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 B57D30A is a viable option if it comes with a documented service history proving regular oil changes and DPF regenerations. However, always budget for an immediate coolant system inspection, as plastic components degrade with age regardless of mileage. Learn more about sourcing used engines.
Reconditioned:
A properly reconditioned B57D30A is the recommended choice for most owners. A reputable rebuild will replace the vulnerable plastic coolant expansion tank, renew all EGR and DPF components, and fit a new timing chain assembly, effectively resetting the engine's reliability clock. Explore reconditioned engines.
Rebuilt:
A full rebuild is justified for high-mileage examples or vehicles where the turbocharger has failed and sent debris into the oil system. An upgraded rebuild should include a remanufactured turbo, upgraded coolant fittings, and a refreshed high-pressure fuel pump. See options for rebuilt engines.
Supply & Fit Line:
Our network of vetted UK specialists offers comprehensive supply and fit packages for the B57D30A, complete with nationwide delivery and robust warranty coverage. Check our supply and fit services.
Vehicle Value Note:
The B57D30A is typically found in G-Series BMWs valued between £15,000 and £55,000 . With reconditioned replacement costs starting around £5,000, the investment remains well within the vehicle's value, making engine replacement a financially sound decision compared to writing off a modern, high-value asset.
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Related Engines
Engines Related to the BMW B57D30A
Explore engines that are closely related to the BMW B57D30A, including its predecessor, successor, and key family variants.
Predecessor
N57D30A
- The N57D30A it replaced suffered from rear-mounted timing chain stretch and turbocharger wear, catastrophic risks that the front-chain B57D30A architecture largely resolved.
Sibling
B57D30B
- A higher-output tune of the same 3.0L inline-six architecture, often found in later G-Series models or specific market trims; it shares the same core block and general failure profile but features different ECU mapping.
Sibling
B57D30C
- The twin-turbo or higher-output M-Performance derivative (e.g., M50d), which introduces different turbo plumbing and cooling requirements, making it a non-straight swap for the single-turbo B57D30A.
FAQ
BMW B57D30AFrequently Asked Questions
Question 1How much does a BMW B57D30A engine replacement cost in the UK-
A reconditioned BMW B57D30A engine costs between £5,000 and £8,000 for supply only, or £5,780 to £9,040 fully fitted by an independent specialist. Used units start around £2,800 but carry a higher risk of hidden wear, while rebuilt units with upgraded components can reach up to £10,500. Labour typically adds 12-16 hours of workshop time.
- Used units start around £2,800 but carry a higher risk of hidden wear.
- Rebuilt units with upgraded components can reach up to £10,500.
- Labour typically adds 12-16 hours of workshop time.
Question 2What is the most common problem with the BMW B57D30A engine-
The most common documented issues with the B57D30A are coolant expansion tank leaks and DPF clogging from frequent short urban journeys. Unlike its N57 predecessor, the B57D30A does not suffer from catastrophic rear timing chain failure. Plastic coolant fittings can become brittle after 60,000 miles, leading to slow leaks, and DPF issues are largely preventable with regular motorway driving to force regeneration.
- Unlike its N57 predecessor, the B57D30A does not suffer from catastrophic rear timing chain failure.
- Plastic coolant fittings can become brittle after 60,000 miles, leading to slow leaks.
- DPF issues are largely preventable with regular motorway driving to force regeneration.
Question 3Which BMW models use the B57D30A engine-
The B57D30A is fitted to the "30d" variants of modern G-Series BMWs, including the 3 Series (G20), 5 Series (G30), X3 (G01), X4 (G02), X5 (G05), and 7 Series (G11/G12). It produces approximately 265 hp (195 kW) and 620 Nm of torque, serving as the foundational, single-turbo tune of the wider B57 inline-six diesel family.
- It produces approximately 265 hp (195 kW) and 620 Nm of torque.
- It serves as the foundational, single-turbo tune of the wider B57 inline-six diesel family.
Question 4Should I buy a used or reconditioned B57D30A engine-
A reconditioned B57D30A is strongly recommended over a used unit due to the age-related degradation of plastic coolant components and the critical nature of DPF health. A proper reconditioning process replaces the vulnerable expansion tank and renews all seals, and ensures the turbo and EGR systems are fully functional and tested, whereas used units may hide impending DPF or cooling failures.
- A proper reconditioning process replaces the vulnerable expansion tank and renews all seals.
- It ensures the turbo and EGR systems are fully functional and tested.
- Used units may hide impending DPF blockages or cooling system failures.
Question 5How do I know if my car has the B57D30A and not a similar code-
You can confirm your engine code by checking the sticker on the timing cover, the vehicle's V5C logbook (section D.2), or by entering your registration above. It is commonly confused with the B57D30B (a higher-output tune) or the older N57D30A, and fitting the wrong revision can cause ECU mapping conflicts and turbo plumbing mismatches.
- It is commonly confused with the B57D30B (a higher-output tune) or the older N57D30A.
- Fitting the wrong revision can cause ECU mapping conflicts and turbo plumbing mismatches.
Compare BMW B57D30A Engine Prices Today
Vetted UK specialists who work on the B57D30A and the wider B57 family every week Minimum 12-month warranty on every reconditioned and rebuilt B57D30A we quote Nationwide delivery - choose supply-only or full supply & fit for your G-Series BMW Our free, no-obligation comparison service matches you with vetted UK engine specialists who understand the specific nuances of the B57D30A. By entering your registration, we confirm your exact fitment before any quotes are sent, ensuring you receive accurate pricing for your specific vehicle. With reconditioned B57D30A units starting from £5,000, comparing takes two minutes and could save you thousands on main dealer prices.
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Minimum 12-Month Warranty
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