The BMW B36 B07 A is a 2,993 cc, inline‑six turbocharged petrol engine produced between 2019 and 2022. It forms part of BMW's modular B — series engine family, featuring TwinPower Turbo technology, direct fuel injection, and Valvetronic variable valve control. In standard tune it delivers 250 kW (340 PS), with peak torque of 500 Nm available from 1,500 to 4,500 rpm, providing strong linear power delivery.
Fitted to high — performance models such as the G20 3 Series M340i, G30…
All production years 2019–2022 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/5678).
The BMW B36 B07 A is a 2,993 cc inline‑six turbocharged petrol engineered for executive and performance models (2019-2022). It combines TwinPower Turbo with direct injection and Valvetronic to deliver high-revving responsiveness and strong mid-range torque. Designed to meet Euro 6d-TEMP, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,993 cc | |
Fuel type | Petrol | |
Configuration | Inline‑6, DOHC, 24‑valve | |
Aspiration | Twin-scroll turbocharged | |
Bore × stroke | 82.0 mm × 94.6 mm | |
Power output | 250 kW (340 PS) @ 5,500–6,500 rpm | |
Torque | 500 Nm @ 1,500–4,500 rpm | |
Fuel system | High-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 11.0:1 | |
Cooling system | Water-cooled, dual-circuit | |
Turbocharger | Single twin-scroll turbo (BorgWarner) | |
Timing system | Chain-driven (double-row primary, single-row secondary) | |
Oil type | BMW Longlife-17 (LL-17 FE+) 0W-30 | |
Dry weight | 186 kg |
The BMW B36 B07 A was used across BMW's G20/G30/G05 platforms with longitudinal mounting. This engine received platform-specific adaptations-cooling system revisions in the G05 X5 and transmission tuning in the G20 3 Series-and from 2021 received updated engine mounts and coolant routing to reduce thermal stress, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The B36 B07 A's primary reliability risk is coolant expansion tank stress fractures in early builds, with elevated incidence in sustained high-load driving. Internal BMW reports from 2021 indicated a notable number of pre-2021 units requiring tank replacement before 80,000 km, while UK DVSA records show low rates of emissions-related failures due to effective GPF management. Extended high-RPM operation and inadequate warm-up cycles increase thermal cycling stress, making coolant system inspection and maintenance critical.
Analysis derived from BMW technical bulletins (2019-2022) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
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The B36 B07 A is fundamentally robust with strong performance and refinement, but early models (2019-2020) had a known issue with coolant expansion tank stress fractures. Post-2021 revisions resolved this with a reinforced tank and updated routing. When maintained properly—using correct oil (0W-30 LL-17) and following service intervals—these engines are highly durable and suitable for long-term ownership.
The most documented issues are coolant expansion tank cracking (pre-2021), turbo wastegate actuator sticking, GPF clogging from short trips, and Valvetronic motor wear. These are covered in BMW service documentation. While not all units fail, awareness and proactive maintenance—especially coolant system checks—can prevent major issues.
This 3.0L turbo petrol engine was used in several BMW performance models: the G20 3 Series M340i, G30 5 Series M540i, G01 X3 xDrive30i, and G05 X5 xDrive40i (2019-2022). It replaced the N55 in many applications and is part of BMW's modular B-series engine family, sharing architecture with the B58 but in a detuned configuration.
Yes, the B36 B07 A responds well to ECU remapping. Stage 1 tunes typically yield +30-50 kW, leveraging the robust stock internals and turbo. Higher stages may require supporting mods like intercooler upgrades. Tuning is popular on M340i and X5 xDrive40i models. However, ensure cooling and fuel systems are in optimal condition before tuning to avoid stress-related failures.
In real-world driving, expect 9.0–11.0 L/100km (26–23 mpg UK) in mixed conditions. Highway efficiency improves to ~7.5 L/100km (~31 mpg UK), while aggressive driving can exceed 13.0 L/100km (18 mpg UK). The GPF and engine management help maintain efficiency, but optimal economy requires use of RON 98 fuel and smooth driving habits.
Yes, the B36 B07 A is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. While the chain is designed for the life of the engine, any unusual noises from the timing cover should be investigated immediately to prevent catastrophic failure.
BMW specifies 0W-30 synthetic oil meeting BMW Longlife-17 (LL-17 FE+) standard. This low-viscosity oil ensures rapid flow at startup and protects the Valvetronic system and turbo bearings. Change intervals are typically 15,000 km or annually. Using non-compliant oil can accelerate wear and void warranty or service claims.
Comprehensive technical documentation and regulatory references
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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
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Commission Regulation (EU) 2017/1151
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