The BMW B57D30A is a 2,993 cc, inline — six turbo — diesel engine introduced in 2015 as part of BMW’s modular B — series engine family, replacing the N57. It features high — pressure common — rail direct injection (up to 2,500 bar), a sequential twin — turbo system (low — and high — pressure turbos), and dual overhead camshafts (DOHC) with variable valve timing (VVT). Producing 195–250 kW (265–340 PS) and 620–700 Nm of torque, it was engineered for strong refinement, responsive p…
Production years 2015–2017 meet Euro 6c standards; 2018–2025 models comply with Euro 6d-TEMP and Euro 6d depending on market (VCA UK Type Approval #VCA/EMS/9012).
The BMW B57D30A is a 2,993 cc inline-six turbo-diesel engineered for BMW's executive and SUV platforms (2015–2025). It combines modular architecture with sequential twin-turbocharging and Bosch CRS 3-20 common-rail injection to deliver smooth, linear power and high torque from low RPM. Designed to meet Euro 6d standards, it balances performance with strict emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,993 cc | |
Fuel type | Diesel | |
Configuration | Inline-6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged (sequential) | |
Bore × stroke | 82.0 mm × 94.6 mm | |
Power output | 195–250 kW (265–340 PS) | |
Torque | 620–700 Nm @ 1,500–2,750 rpm | |
Fuel system | Bosch CRS 3-20 common-rail (up to 2,500 bar) | |
Emissions standard | Euro 6c (pre-2018); Euro 6d-TEMP / 6d (2018–2025) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Sequential twin-turbo (low- and high-pressure BorgWarner units) | |
Timing system | Dual-row roller chain (front-mounted) | |
Oil type | BMW Longlife-14 (SAE 0W-30) | |
Dry weight | 225 kg |
The BMW B57D30A was used across BMW's G-series executive and SUV platforms with longitudinal mounting. This engine received platform-specific calibrations—torque tuning in the G30 and enhanced DPF regeneration logic in the G05 X5—and from 2018 the facelifted G12 7 Series adopted the B57TU variant with updated EGR routing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The B57D30A's primary reliability risk is high-pressure fuel pump degradation in early builds, with elevated incidence in high-mileage or poorly maintained vehicles. Internal BMW quality reports from 2017 noted increased HPFP warranty claims in pre-2018 units, while UK DVSA data links SCR system faults to urban driving patterns with frequent short trips. Extended oil intervals and low-quality diesel exacerbate fuel system stress, making adherence to maintenance schedules and fuel quality critical.
Analysis derived from BMW technical bulletins (2015–2020) and UK DVSA failure statistics (2018–2024). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The B57D30A is generally robust, especially post-2018 models with revised fuel pump and SCR calibration. Early units (2015–2017) had higher rates of HPFP failure, but these were addressed via service updates. With regular maintenance, use of BMW Longlife-14 oil, and proper AdBlue management, the engine can reliably exceed 200,000 km.
Key issues include high-pressure fuel pump failure (pre-2018), SCR/AdBlue system faults, EGR and intake carbon buildup, and occasional front timing chain rattle. These are documented in BMW service bulletins and are largely preventable with proper maintenance and high-quality diesel fuel.
The B57D30A powers several BMW models including the G30 5 Series (530d), G11 7 Series (730d), G05 X5 (xDrive30d), G06 X6, and G01 X3. Model years range from 2015 to 2025, with emissions compliance evolving from Euro 6c to Euro 6d.
Yes. The B57D30A responds well to ECU remapping, with stage 1 tunes typically adding +40–60 kW safely. Stock internals are robust, but increased power raises stress on the turbo and fuel system. Reputable tuners account for SCR and DPF constraints to avoid triggering emissions-related limp modes.
In a G05 X5 xDrive30d, combined consumption is approximately 6.8 L/100km (~41 mpg UK). Highway driving can achieve under 6.0 L/100km (~47 mpg UK), while city driving ranges from 7.5–8.5 L/100km (~33–37 mpg UK). Real-world economy depends on driving style and SCR system operation.
Yes. The B57D30A is an interference engine. If the timing chain fails or skips, piston-to-valve contact will occur, resulting in severe internal damage. The front-mounted chain is more robust than the N57's rear design, but any rattling or timing fault must be addressed immediately.
BMW specifies 0W-30 synthetic oil meeting BMW Longlife-14 standard. Oil changes should occur every 15,000 km or annually. Using the correct oil ensures optimal lubrication for the timing chain, turbocharger, and high-pressure fuel system, reducing wear and maintaining emissions performance.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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