How much does a BMW B57 or B58 engine replacement cost?

A reconditioned B57 (diesel) costs £5,000–£8,000, while the B58 (petrol) is £3,800–£6,000 supply only [BMW-QUOTE], varying by sub‑variant and vehicle. Fitting adds £650–£1,300. Use our calculator for your specific model.

Is the BMW B57/B58 a reliable engine?

The B57 and B58 earn 4★ out of 5 [BMW-VERIFIED], based on 1,000+ combined UK enquiries. They are widely considered BMW’s most reliable modern sixes, with fewer catastrophic failures than the N47/N57.

What is the most common BMW B57/B58 failure?

Coolant system issues are the most common -water pump leaks, expansion tank cracks, and plastic fittings failing. These typically occur from 60,000–120,000 miles and are relatively inexpensive to fix.

Which BMW models use the B57 or B58 engine?

The B57 diesel powers 20d, 30d, 40d models across the 1–8 Series and X‑range; the B58 petrol powers 30i, 40i and M Performance models like the M340i, M440i, M240i, X3 M40i and Z4 M40i.

How long does the BMW B57/B58 engine last?

With proper servicing (10,000‑mile oil changes using BMW Longlife‑17 spec), both can comfortably exceed 180,000–220,000 miles. The B58’s open‑deck block and B57’s steel‑piston design are built for longevity.

BMWB57/B58Diesel/Petrol3.0L Straight-62015–present

BMW B57/B58 Engine -Specs, Reliability & Replacement Cost

The BMW B57 diesel and B58 petrol are the modern modular straight-sixes -robust and efficient, but each has its own known issues. Backed by 1,000+ combined real UK enquiries in 2025 [BMW-VERIFIED].

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BMW B57/B58 Engine -Specs, Reliability & Replacement Cost

Compare B57/B58 Engine Prices

1,000+
Enquiries
18
Models
Fitted
74/100
Engine
Score
Part of Engine Finders

BMW B57 / B58 Engine Overview

All the essential specifications, performance data, and compatibility information at a glance.

Engine Family

BMW B57 / B58

Fuel

Diesel (B57) / Petrol (B58)

Power Range

265–400 hp (B57) / 335–510 hp (B58)

Overall Engine Score

74/100

★★★★☆

Configuration / Displacement

Straight-6, 3.0L (2,993 cc)

Modern turbodiesel four-cylinder engine with proven architecture.

Years Produced

2015–present

Over a decade of production and continuous development.

Models Fitted (BMW only)

Fitted across a wide range of BMW vehicles and body styles.

Cross-Brand Fitment

The N47 engine is engineered exclusively for BMW vehicles.

BMW-Verified Data

Verified using real UK enquiries and workshop data.

Real-World Insights

Based on 1,450+ UK enquiries in 2025.

Trusted by Enthusiasts

Part of Engine Finders - UK's leading engine specialists.

Quality You Can Trust

Every engine is checked, inspected and quality assured.

Engine Family

BMW B57 / B58

Fuel

Diesel (B57) / Petrol (B58)

Configuration /
Displacement

Straight-6, 3.0L (2,993 cc)

Power Range

265–400 hp (B57) / 335–510 hp (B58)

Years Produced

2015–present

Models Fitted (BMW only)

Cross-Brand Fitment

Overall Engine Score

74/100

★★★★☆

Verdict & Rating

Rating:

out of 5

90% confidence -based on 1,000+ combined UK enquiries, specialist reports, and manufacturer TSBs.

The B57 and B58 are BMW’s most refined modern sixes -robust and efficient -but coolant system issues are the main watchpoint; budget for preventative maintenance.

Best for:

High-mileage drivers wanting strong economy (B57) or enthusiasts seeking smooth power (B58).

Avoid if:

You’re unprepared for occasional cooling-system repairs (water pump, expansion tank) from 60,000 miles.

Engine Score breakdown:

DimensionScore (of 20)

Reliability

4★ × 4 = 16 -both are significantly more reliable than their N-series predecessors

16 /20

Repair Cost

Combined recon midpoint ~£6,400 → falls in £5,000–£6,999 band

12 /20

Repairability

Most issues are non-catastrophic (coolant leaks, sensors) and well-understood

16 /20

Parts Supply

Modern modular engines; parts abundant through BMW and aftermarket

20 /20

Replacement Economics

Recon cost as % of lowest host-value (£15k) ~43% (30-44% band) – conservative watch

10 /20

Total Engine Score

74 / 100

Rating:

out of 5

90% confidence -based on 1,000+ combined UK enquiries, specialist reports, and manufacturer TSBs.

The B57 and B58 are BMW’s most refined modern sixes -robust and efficient -but coolant system issues are the main watchpoint; budget for preventative maintenance.

Engine Score breakdown:

DimensionScore (of 20)

Reliability

4★ × 4 = 16 -both are significantly more reliable than their N-series predecessors

16 /20

Repair Cost

Combined recon midpoint ~£6,400 → falls in £5,000–£6,999 band

12 /20

Repairability

Most issues are non-catastrophic (coolant leaks, sensors) and well-understood

16 /20

Parts Supply

Modern modular engines; parts abundant through BMW and aftermarket

20 /20

Replacement Economics

Recon cost as % of lowest host-value (£15k) ~43% (30-44% band) – conservative watch

10 /20

Total Engine Score

74 / 100

Best for:

High-mileage drivers wanting strong economy (B57) or enthusiasts seeking smooth power (B58).

Avoid if:

You’re unprepared for occasional cooling-system repairs (water pump, expansion tank) from 60,000 miles.

Compatible BMW Models

BMW B57 / B58 engines are fitted across 14+ models from 2015–2023.

BMW Exclusive Engine

This is an exclusive BMW engine. No cross-platform sharing.

2015

8 Years of Production

2023

BMW

1 Series

F20 · F21

125d · 130i (B58)

2015–20192 Variants →

BMW

2 Series

F22 · F23 · G42

M240i · 230i (B58); 225d (B57) · M240i (B58)

2016–20213 Variants →

BMW

3 Series

G20 · G21

330i · M340i (B58); 320d · 330d (B57)

2018–20183 Variants →

BMW

4 Series

G22 · G23

430i · M440i (B58); 420d · 430d (B57)

2020–20203 Variants →

BMW

5 Series

G30 · G31

530i · 540i (B58); 520d · 530d (B57)

2017–20233 Variants →

BMW

6 Series

G32

630i · 640i (B58); 630d (B57)

2017–20232 Variants →

BMW

7 Series

G11 · G12

730i · 740i (B58); 730d · 740d (B57)

2015–20223 Variants →

BMW

8 Series

G15 · G16

840i (B58); 840d (B57)

2018–20181 Variants →

BMW

G01

xDrive30i · M40i (B58); xDrive20d · xDrive30d (B57)

2017–20173 Variants →

BMW

G02

xDrive30i · M40i (B58); xDrive20d · xDrive30d (B57)

2018–20183 Variants →

BMW

G05

xDrive40i (B58); xDrive30d · xDrive40d (B57)

2018–20182 Variants →

BMW

G06

xDrive40i (B58); xDrive30d · xDrive40d (B57)

2019–20192 Variants →

BMW

G07

xDrive40i (B58); xDrive30d · xDrive40d (B57)

2018–20182 Variants →

BMW

G29

sDrive20i · M40i (B58)

2019–20192 Variants →

Other BMW Models

B57 / B58 also appears in limited variants and markets.

View full details →

Compatibility Verified

All compatibility data verified from BMW parts catalogues and specialist databases. [BMW-VERIFIED]

BMW

1 Series

Generation

F20/F21

Variant/Badge

125d, 130i (B58)

Years

2015–2019

BMW

2 Series

Generation

F22/F23

Variant/Badge

M240i, 230i (B58); 225d (B57)

Years

2016–2021

BMW

2 Series

Generation

G42

Variant/Badge

M240i (B58)

Years

2021–present

BMW

3 Series

Generation

G20/G21

Variant/Badge

330i, M340i (B58); 320d, 330d (B57)

Years

2018–present

BMW

4 Series

Generation

G22/G23

Variant/Badge

430i, M440i (B58); 420d, 430d (B57)

Years

2020–present

BMW

5 Series

Generation

G30/G31

Variant/Badge

530i, 540i (B58); 520d, 530d (B57)

Years

2017–2023

BMW

6 Series

Generation

G32

Variant/Badge

630i, 640i (B58); 630d (B57)

Years

2017–2023

BMW

7 Series

Generation

G11/G12

Variant/Badge

730i, 740i (B58); 730d, 740d (B57)

Years

2015–2022

BMW

8 Series

Generation

G15/G16

Variant/Badge

840i (B58); 840d (B57)

Years

2018–present

BMW

Generation

G01

Variant/Badge

xDrive30i, M40i (B58); xDrive20d, xDrive30d (B57)

Years

2017–present

BMW

Generation

G02

Variant/Badge

xDrive30i, M40i (B58); xDrive20d, xDrive30d (B57)

Years

2018–present

BMW

Generation

G05

Variant/Badge

xDrive40i (B58); xDrive30d, xDrive40d (B57)

Years

2018–present

BMW

Generation

G06

Variant/Badge

xDrive40i (B58); xDrive30d, xDrive40d (B57)

Years

2019–present

BMW

Generation

G07

Variant/Badge

xDrive40i (B58); xDrive30d, xDrive40d (B57)

Years

2018–present

BMW

Generation

G29

Variant/Badge

sDrive20i, M40i (B58)

Years

2019–present

Other BMW Models

B57 / B58 also appears in limited variants and markets.

View full details ›

Compatibility Verified

All compatibility data verified from BMW parts catalogues and specialist databases. [BMW-VERIFIED]

Exclusive to BMW -no cross-brand fitment.

BMW B57 / B58 Engine Price Guide

All prices are estimates from UK specialists [BMW-QUOTE]

Fitting a B57 or B58 typically takes 10–14 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer) [BMW-QUOTE].

(Exclusive mode – no cross-link)

USED

Supply Only

£2,000–£5,000

Fitted (Indie)

£2,780–£5,940

3–6 months

BMW B57 / B58 Engine Price Guide

All prices are estimates from UK specialists

[BMW-QUOTE]

USED

Supply Only

£2,000–£5,000

Fitted (Indie)

£2,780–£5,940

Warranty

3–6 months

Frequently Asked Questions

Expert answers to the most common BMW B57 / B58 engine questions.

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Find the best BMW B57 / B58 engine replacement UK drivers rely on.

Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.

Compare BMW B57/B58 Engine Prices Now