BMW B57D30 A B Engine Replacement - Rebuilt & Reconditioned Units from £5,000

Genuine fitment for X3 3.0d (G01, 2018-2021). Every BMW B57D30 A B unit is bench-tested to OEM standards before dispatch, with a 12-month unlimited-mileage warranty as standard. Compare quotes from vetted UK specialists and save up to 60% versus a main dealer.

BMW B57D30A/A/B Engine for Sale - Buy Reconditioned Engines from Trusted UK Suppliers

Enter Your Vehicle Registration To Find The Best Supplier Near You

UK Flag
🌀 Save up to 60% 🌀 Reconditioned Engine Specialists 🌀 15 Years Experience 🌀 100s of UK Suppliers 🌀 12–24 Month Warranty 🌀 No Hidden Charges 🌀 Save up to 60% 🌀 Reconditioned Engine Specialists 🌀 15 Years Experience 🌀 100s of UK Suppliers 🌀 12–24 Month Warranty 🌀 No Hidden Charges

Secure enquiry - no spam, no pressure. Genuine quotes only.

BMW 3.0L B57D30A / B TwinPower Turbo Diesel Engine

A Refined Six-Cylinder for Power, Torque and Longevity

The BMW B57D30A and B57D30B engines are part of BMW’s modular B-series engine family, introduced in 2015 as successors to the N57 series. Designed to deliver higher efficiency, lower emissions, and better refinement, the B57D30A/B units represent the latest generation of BMW’s diesel inline-six architecture. Manufactured with a strong yet lightweight aluminium block, these engines utilise a 3.0-litre displacement in a straight-six configuration - renowned for its balance and smooth operation.


Featuring advanced common rail injection, variable geometry turbocharging (single or multi-stage depending on variant), and integrated EGR and DPF systems, the B57 meets stringent Euro 6 emission standards while maintaining impressive torque and responsiveness. Power outputs range from 265PS in standard models to an impressive 400PS in the quad-turbo M50d variant. These engines are mated to ZF 8-speed automatic transmissions and are found in both rear-wheel and xDrive all-wheel-drive applications.


Its predecessor, the BMW N57, set a high bar for durability and performance. However, the B57 refines this formula with improved thermal management, reduced friction internals, and better compatibility with mild hybrid (48V MHEV) technology in later versions. Its robust design, excellent economy-to-power ratio, and proven longevity have made the B57 a top choice in the UK for reconditioned and replacement diesel units - particularly for drivers who demand luxury and long-haul performance.


This engine powers a wide range of models including the BMW 530d engine, the flagship BMW 730d engine, and SUV variants like the BMW X5 30d engine, X6 40d engine and the high-output BMW X7 M50d engine. Its popularity across the 5 Series, 7 Series, and X Series range underscores its wide appeal to both executive saloon and performance SUV drivers alike.

Technical Specifications & Configuration

Engine Code
B57D30A / B
Engine Size
2993cc / 3.0 Litres
Cylinder Configuration
Inline 6 cylinder (I6)
Aspiration
Turbocharged (Single & Twin-Turbo variants)
Fuel Type
Diesel
Injection System
Common Rail Direct Injection
Valvetrain
DOHC - 24 valves with VVT
Compression Ratio
~16.5:1
Cooling System
Water cooled with electric water pump
Block Material
Aluminium Alloy
Head Material
Aluminium Alloy
Emission Standard
Euro 6d-TEMP (DPF, EGR & SCR/AdBlue)
Power Output Range
265 - 400 PS (depending on tuning level)
Torque Output
620 - 760 Nm
Turbo Configuration
Twin-Turbo (Variable geometry on some models)
Fuel Economy (Est.)
35-47 MPG combined

Common Configurations

  • BMW 530d xDrive: 265 PS, 8-speed ZF Auto, AWD
  • BMW 730d: 265 PS, Rear-Wheel Drive, Luxury Sedan
  • BMW X5 xDrive30d: 265 PS, MHEV Setup, AWD
  • BMW X6 M50d: 400 PS Quad-Turbo, Performance Diesel
  • BMW X7 xDrive40d: 340 PS, Mild-Hybrid, ZF 8-Speed
  • BMW 840d Gran Coupe: 320 PS, AWD, Touring Diesel

Noteworthy Engineering Highlights

  • 🛠️Modular aluminium block: reduces weight and boosts refinement
  • 💨Quad-turbocharging: on M50d variant for extreme torque output
  • 🌡️Water-cooled VGT turbo: for optimal spool and thermal efficiency
  • 🧊Advanced cooling system: supports high-performance diesel applications
  • 🔄Balance shaft system: ensures NVH suppression in large vehicles

Engine Naming Reference

BMW B57, B57D30A, B57D30B, 30d, 40d, 50d, xDrive30d, M50d, TwinPower Diesel, BMW 3.0d, 6-cylinder diesel, quad-turbo diesel, mild hybrid diesel, ZF 8HP70, Euro 6d-TEMP

Types of BMW B57D30A/B Replacement Engines Available

B57D30A/B Rebuilt Engines

High-performance rebuilds with OEM-grade pistons, gaskets & timing chains.

B57D30A/B Remanufactured Engines

Every unit fully stripped and rebuilt to match factory tolerances.

B57D30A/B Reconditioned Engines

Carefully inspected, cleaned, and restored by seasoned diesel specialists.

B57D30A/B Replacement Engines

Direct-fit diesel engines ideal for quick swaps and no-hassle installations.

B57D30A/B Refurbished Engines

Budget-friendly, tested units with clean internals and compression-verified heads.

B57D30A/B Used Engines

Hand-selected from breakers and verified by our expert mechanics.

Compatible Models with BMW B57D30A / B Engine

BMW 3 Series Compatible Models

BMW 3 Series G20 Engine compatible with B57D30A Diesel

BMW 3 Series (G20)
BMW 3 Series G21 Touring Engine compatible with B57D30B Diesel

BMW 3 Series Touring (G21)
BMW 3 Series G28 Engine compatible with B57D30A Diesel

BMW 3 Series LCI (G28)

BMW 3 Series Applications

BMW Logo
BMW 330d (G20) 265HP
2019-Present
B57D30A / B turbo diesel
BMW 330d Touring (G21) 265HP
2019-Present
B57D30A / B turbo diesel
BMW 320d (G28) 190HP
2020-Present
B47D20U1, some with B57D30A

BMW X Series Applications

BMW Logo
BMW X3 30d (G01) 265HP
2017-Present
B57D30A diesel turbo
BMW X4 30d (G02) 265HP
2018-Present
B57D30A diesel turbo
BMW X5 30d (G05) 265HP
2018-Present
B57D30A diesel turbo
BMW X6 30d (G06) 265HP
2019-Present
B57D30B diesel turbo
BMW X7 30d (G07) 265HP
2018-Present
B57D30A diesel turbo

Common BMW B57D30A / B Engine Problems & Solutions


Pricing, Warranty & Availability

Most Popular

Rebuilt BMW B57D30A/B Engine

From
£5,000
(Supply Only)
  • ✔ Fully Disassembled & Rebuilt
  • ✔ OEM-Grade Replaced Parts
  • ✔ Like-New Condition
  • ✔ 12-24 Month Warranty

Reconditioned BMW B57D30A/B Engine

From
£4,200
(Supply Only)
  • ✔ Professionally Reconditioned
  • ✔ Thoroughly Inspected & Tested
  • ✔ Restored to OEM Standard
  • ✔ 12 Month Warranty
Cheapest Option

Used BMW B57D30A/B Engine

From
£2,500
(Supply Only)
  • ✔ Basic Inspection
  • ✔ Compression Tested
  • ✔ Known Service History
  • ✔ 30 Days to 3 Month Warranty

Refurbished BMW B57D30A/B Engine

From
£3,700
(Supply Only)
  • ✔ Partial Overhaul
  • ✔ Key Component Replacement
  • ✔ Cost-effective Option
  • ✔ 3 to 6 Month Warranty

📦 Stock Availability & Delivery Time

  • 🔄 High availability across UK suppliers
  • 🚚 Next-day delivery on in-stock units (supply only)
  • 🛠️ 7-10 day turnaround for rebuilt units
  • 📦 Free UK mainland delivery (select suppliers)

⭐ What You Get With Every BMW B57D30A/B Engine

  • 🧰 OEM-quality rebuilds using BMW-approved parts
  • 🔎 Full inspection reports w/ compression & leak-down tests
  • 📋 Engine serial & block codes verified
  • 💬 UK-based support before & after sale
  • 🔄 Exchange options for faulty units
  • 🧾 Simple returns & warranty claims

BMW B57D30A/B Engine Reconditioning Process


STEP 1 1 Day

Initial Inspection & Diagnostic Reporting

  • Visual & Dimensional Checks: Deck flatness, bore wear, and head warpage.
  • Oil & Coolant Analysis: Detect fuel dilution, glycol traces, or contamination.
  • Compression Testing: Verify ring and valve sealing before teardown.
STEP 2 1-2 Days

Complete Strip Down & Component Cleaning

  • Media Blast Cleaning: Remove carbon & sludge from internals.
  • Chemical Degreasing: Clean oil pump, HPFP, and turbo cores.
  • Part Identification: Catalog rods, pistons, and cams for traceability.
STEP 3 2-3 Days

Non-Destructive Testing & Machining

  • Crack Testing: Magnaflux and dye penetrant for structural faults.
  • Boring & Honing: Re-bore cylinders and hone for correct finish.
  • Crank Grinding: Undersize grind and dynamic balance.
  • Surface Milling: Flatness to <0.03mm deviation.
STEP 4 1 Day

Component Replacement with OEM Parts

  • Pistons & Rings: Forged internals matched to rebored block.
  • Timing Kit: New chain, guides, tensioner, sprockets.
  • Seals & Gaskets: All major gaskets and seals replaced.
  • Water & Oil Pump: New OEM pumps with updated specs.
STEP 5 1 Day

Assembly & Torque Angle Verification

  • Sequential Torque: Head & main bolts torqued to spec.
  • Phaser Setup: Cam phasers installed and OCVs verified.
  • Injector Setup: Calibrated with precision flow test bench.
STEP 6 1 Day

Hot Bench Dyno & Road Simulation

  • Cold Start Test: Oil pressure and tensioner function verified.
  • Load Simulation: Urban/motorway load profiles checked for leaks and stability.
  • Compression & Emissions: Ring seal and smoke tested before dispatch.
BMW replacement engine - Engine Finders

Why Choose Engine Finders for BMW B57D30A/B Diesel Engine?

At Engine Finders, we don’t just sell engines - we deliver peace of mind. Here’s why BMW owners across the UK trust us:

  • ✔ Trusted UK Suppliers

    We work exclusively with vetted UK suppliers who specialize in BMW engines - no middlemen, no guesswork.

  • ✔ Save Up to 60% vs Dealership

    Why overpay? Compare quotes from multiple sellers & save up to 60% on BMW replacement engines, get top-tier quality for less.

  • ✔ Tested & Certified Engines

    Every BMW engine is thoroughly tested for durability and performance, backed by a 6-24 month warranty.

  • ✔ Fast Quotes & Faster Delivery

    Quick quotes, nationwide delivery, and optional vehicle recovery, get your Land Rover back on the road in no time.

  • ✔ Expert BMW Defender Support

    Need help? Our friendly BMW specialists guide you through engine compatibility, specs, and installation process.

  • ✔ B57 Engines Specialists

    From BMW 530d to X7 M50d, we offer all variants (265PS / 320PS / 400PS).

  • ✔ Performance Matched with Experience

    Our remanufactured and reconditioned engines often meet or exceed OEM specs - ready for serious off-road and on-road action.

  • ✔ We Work for You - Not the Suppliers

    We’re 100% on your side, helping you choose the best engine deal instead of just pushing supplier specials.

Tuning & Performance Upgrades


Ready to Get Engine Quotes?

Enter your vehicle registration number and let Engine Finders find you the best replacement engine deals on BMW.

Just Add Your Reg & Click Go - It's That Simple

Flag Icon

Engine Finders instantly matches your vehicle with our trusted engine suppliers and garages near you. Save time. Save money. No stress.

Frequently Asked Questions - BMW B57D30A / B Engine

How much does a BMW B57D30A / B replacement engine cost in the UK?

A replacement BMW B57D30A / B engine typically costs between £3,000 and £5,500, depending on condition, mileage, and warranty. Reconditioned or remanufactured units often come with a 12-month warranty and optional fitting services. Expect higher costs if the turbocharger or injectors need replacing.

How reliable is the BMW B57D30A / B engine?

The B57D30A / B is generally considered a reliable diesel engine, especially when serviced every 10,000-12,000 miles using high-quality LL-04 5W 30 oil. However, common issues like EGR cooler leaks, DPF clogging, and swirl flap carbon buildup may arise past 80,000 miles if not maintained properly.

What vehicles use the BMW B57D30A / B engine?

The B57D30A / B is found in models such as the BMW 530d, 730d, X5 30d, and X6 30d, particularly from model years 2015 to 2020. It's also used in various xDrive and M Sport trims. The B57 engine replaced the N57, offering improved emissions and torque output.

Does the B57D30A / B engine have timing chain issues?

Unlike the older N47 and N57 engines, the B57D30A / B is less prone to timing chain failure thanks to an improved design. Still, timing chain wear can occur after 120,000 miles if oil changes are neglected. Listen for cold start rattle and inspect chain tension at high mileage intervals.

Can the BMW B57D30A / B engine be remapped safely?

Yes, the B57D30A / B engine can be remapped for performance gains, often achieving +40-60 bhp and improved torque. However, tuning must be done by reputable specialists and may affect fuel economy, insurance, and MOT emissions compliance. Upgraded intercoolers or DPF deletes are often used in track applications.

What oil type and service interval is best for the B57D30A / B?

Use BMW LL-04 5W 30 fully synthetic oil and change it every 10,000 miles or 12 months to maximise engine life. The B57 engine is sensitive to oil quality - long-life intervals above 15,000 miles are not recommended, especially for UK stop-start driving patterns.

Does the BMW B57D30A / B have a DPF and AdBlue system?

Yes, the B57D30A / B engine uses a diesel particulate filter (DPF) and AdBlue (SCR) system to meet Euro 6 emissions standards. Regular motorway driving helps maintain DPF health. AdBlue refills are typically required every 5,000-8,000 miles, depending on driving habits.

How long does a BMW B57D30A / B engine last?

With proper care, the B57D30A / B can last 250,000 miles or more. Longevity depends on frequent servicing, clean EGR/DPF operation, and use of high-quality fuel. Turbo and fuel injector replacement may be needed around 100k-150k miles depending on driving style and maintenance record.

Can I fit a B57D30A / B engine into an older BMW model?

Engine swaps are possible but complex due to electronic compatibility, emissions components, and ECU coding. Retrofitting a B57 into a vehicle originally built for the N57 or earlier may require custom mounts, harnesses, and reprogramming. Consult a BMW specialist familiar with Euro 6 diesel conversions.