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BMW B57D30B Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 286hp 3.0-litre inline-6 diesel engine fitted to modern G-series BMW models, offering a robust and refined alternative to the older N57 generation. Reconditioned units start from £5,000 , and the broader B57D30 family generated 460 UK replacement requests in 2025 .
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 B57D30B - Specifications at a Glance
Engine Code
B57D30B
Fuel
Diesel
Configuration
3.0L inline-6, single turbo (with variable geometry)
Power Output(s)
286 hp (210 kW)
Years Produced
2015-Present
UK Models Fitted
5+ BMW models - full list in Compatibility below
2025 UK Replacement Requests
460 (B57D30 family)
Replaced
N57D30B
Replaced By
Current latest revision - no direct successor
Most Common Failure
Coolant system leaks and DPF clogging
Reconditioned Price Range
£5,000-£8,000 supply-only
Vetted UK specialists for B57D30B replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the B57D30B-
02
BMW 5 Series
03
BMW 7 Series
04
BMW X3
05
BMW X5
CROSS-BRAND
B57D30B is documented across 5 BMW applications spanning 3 Series, 5 Series, 7 Series, X3, X5. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
BMW B57D30B 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 final cost of a BMW B57D30B engine replacement is influenced by the condition of ancillary components, particularly the EGR system, DPF, and cooling system, which are frequently serviced preventatively during a swap. Because the B57 family is significantly more robust than its N57 predecessor, finding a well-maintained used unit is more viable. However, a reconditioned B57D30B with updated coolant system components offers the best long-term security. For a detailed breakdown of what affects your final bill, see our full reconditioned engine cost guide.
Labour Guide
Fitting a B57D30B typically takes 12-16 hours at £65-£75/hr (independent) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
BMW B57D30B Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the B57D30B, based on real-world data and verified failure patterns.
Verified issue focus: Coolant system leaks and DPF clogging.
1. Coolant System Leaks (Expansion Tank & Hoses) - 100,000+ miles
1. Coolant System Leaks (Expansion Tank & Hoses) - 100,000+ miles
Typical onset:
100,000-180,000 miles
What happens:
The plastic coolant expansion tank and associated routing hoses can become brittle over time due to heat cycling. This leads to slow coolant loss or, in some cases, sudden leaks under pressure. Early warning signs include a sweet smell from the engine bay or frequent low-coolant warnings on the iDrive system.
Repair vs replace:
This is typically resolved with targeted component replacement (£300-£800). A full B57D30B engine replacement is rarely required unless severe, ignored overheating has caused secondary head gasket failure.
Read more about this issue
2. DPF Clogging in Urban Use - 80,000+ miles
2. DPF Clogging in Urban Use - 80,000+ miles
Typical onset:
80,000+ miles
What happens:
Frequent short journeys prevent the Diesel Particulate Filter (DPF) from completing active regeneration cycles. Over time, this leads to restricted exhaust flow, reduced performance, increased fuel consumption, and persistent engine management warnings.
Repair vs replace:
Often resolved via forced regeneration or professional DPF cleaning. If the substrate is melted or heavily ash-clogged, a full DPF replacement is necessary, but this does not typically require a full engine replacement.
Read more about this issue
The B57D30B is widely regarded as a highly robust modern diesel. It resolved the catastrophic rear-mounted timing chain vulnerabilities of the older N57 generation by moving the chain to the front of the engine, making it significantly more reliable for long-term ownership .
Compare rebuilt B57D30B prices with the failure already addressed
Engine Variants
How to Confirm You Have the B57D30B
The B57D30B engine code is stamped directly onto the engine block, typically located on a machined pad near the oil filter housing or on the front timing cover. It is also explicitly listed on your vehicle's V5C registration document under the engine details section, or it can be definitively verified via a VIN decode through a BMW specialist. The B57D30B is frequently confused with the lower-output B57D30A (typically 265 hp) or the higher-output B57D30C (typically 340 hp). While they share the same 3.0-litre inline-6 architecture, fitting the wrong revision can result in ECU mapping conflicts, incompatible turbocharger plumbing, and different DPF/EGR configurations. Always verify the exact code before purchasing a replacement unit.
Not sure- Enter your registration above, and we will confirm your exact B57D30B fitment instantly before any quotes are generated.
Easily Confused
N57D30B
- The previous generation 3.0L inline-6 diesel that the B57 replaced; it featured a rear-mounted timing chain which made labour-intensive repairs common, a flaw the B57 resolved by moving the chain to the front.
Confirm the exact B57D30B fitment
Not sure- Enter your registration above, and we will confirm your exact B57D30B fitment instantly before any quotes are generated.
Buying Guide
Buying a Replacement B57D30B - 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 B57D30B is a viable option for this engine, provided it comes with a comprehensive service history proving regular oil changes and no history of coolant system neglect. The front-mounted timing chain design makes verifying its condition far less risky than on the older N57 generation.
Reconditioned:
A proper reconditioned B57D30B is the most balanced choice for most owners. A reputable rebuild will replace the plastic coolant expansion tank, thermostat housing, and all critical seals with updated components, directly addressing the engine's most common minor failure points while restoring factory compression.
Rebuilt:
A full rebuild is justified for high-value G-series hosts such as the G05 X5 or G11 7 Series, where long-term ownership is planned. An upgraded rebuild should include a verified DPF/EGR system, updated cooling components, and potentially a remapped ECU to maximise longevity and efficiency.
Supply & Fit Line:
Sourcing and fitting your B57D30B through our vetted network ensures the work is completed by BMW specialists, backed by a minimum 12-month warranty and nationwide delivery options.
Vehicle Value Note:
For typical host vehicles like the G30 5 Series, G01 X3, and G05 X5, current market values range from £18,000 to £45,000. A reconditioned B57D30B replacement sits comfortably within this value band, making it a financially sound investment. Even for earlier G-series hosts valued around £14,000, the combination of strong retained values and the B57's inherent reliability keeps the replacement cost well within the viable threshold.
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Related Engines
Engines Related to the BMW B57D30B
Explore engines that are closely related to the BMW B57D30B, including its predecessor, successor, and key family variants.
Predecessor
N57D30B
- The previous generation 3.0L inline-6 diesel that the B57 replaced; it featured a rear-mounted timing chain which made labour-intensive repairs common, a flaw the B57 resolved by moving the chain to the front.
Successor
None
The B57D30B is currently the latest production revision of the 286hp 3.0L diesel variant, with no direct successor yet announced for current G-series hosts.
FAQ
BMW B57D30BFrequently Asked Questions
Question 1How much does a BMW B57D30B engine replacement cost-
A reconditioned BMW B57D30B engine typically costs between £5,000 and £8,000 for supply only, with fitted prices ranging from £5,780 to £9,040. Used units start around £2,800 but may carry unknown service history risks. Fitted costs generally include 12-16 hours of labour at independent specialist rates. Reconditioned units should include updated coolant system components as standard.
- Used units start around £2,800 but may carry unknown service history risks.
- Fitted costs generally include 12-16 hours of labour at independent specialist rates.
- Reconditioned units should include updated coolant system components as standard.
Question 2What is the most common problem with the B57D30B engine-
The most documented issues are coolant system leaks from the plastic expansion tank and associated routing hoses, alongside DPF clogging in predominantly urban use. Typical onset for coolant leaks is between 100,000 and 180,000 miles. Symptoms include unexplained coolant loss or frequent low-coolant warnings on the iDrive system. Unlike the older N57, the front-mounted timing chain is highly reliable and rarely causes catastrophic failure.
- Typical onset for coolant leaks is between 100,000 and 180,000 miles.
- Symptoms include unexplained coolant loss or frequent low-coolant warnings on the iDrive system.
- Unlike the older N57, the front-mounted timing chain is highly reliable and rarely causes catastrophic failure.
Question 3Which BMW models use the B57D30B engine-
The B57D30B is widely fitted across BMW's G-generation lineup, primarily powering the "30d" badges. Common hosts include the 3 Series (G20/G21 330d), 5 Series (G30/G31 530d), 7 Series (G11/G12 730d), X3 (G01 xDrive30d), and X5 (G05 xDrive30d) from 2016 onwards. Always verify your specific chassis code and engine stamping before ordering a replacement unit.
- Common hosts include the 3 Series (G20/G21 330d), 5 Series (G30/G31 530d), 7 Series (G11/G12 730d), X3 (G01 xDrive30d), and X5 (G05 xDrive30d) from 2016 onwards.
- Always verify your specific chassis code and engine stamping before ordering a replacement unit.
Question 4Should I buy a used or reconditioned B57D30B engine-
A reconditioned B57D30B is strongly recommended over a used unit to ensure longevity. A proper rebuild will replace the plastic coolant expansion tank, thermostat housing, and all critical seals with updated components, directly addressing the engine's most common minor failure points. A used engine inherits the exact same cooling system wear risks unless it comes with documented, recent preventative maintenance records.
- A proper rebuild will replace the plastic coolant expansion tank, thermostat housing, and all critical seals with updated components, directly addressing the engine's most common minor failure points.
- A used engine inherits the exact same cooling system wear risks unless it comes with documented, recent preventative maintenance records.
Question 5How do I know if my car has the B57D30B engine-
The B57D30B engine code is stamped on a machined pad on the engine block, typically located near the oil filter housing or front timing cover. It is also explicitly listed on your V5C registration document under the engine details section. You can use our free registration lookup tool at the top of this page to confirm your exact engine code instantly before requesting quotes.
- It is also explicitly listed on your V5C registration document under the engine details section.
- You can use our free registration lookup tool at the top of this page to confirm your exact engine code instantly before requesting quotes.
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Vetted UK specialists for B57D30B 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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