The BMW B47D20A is a 1,995 cc, inline-four turbo-diesel engine introduced in 2015 as a successor to the N47 series. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC) with BMW’s modular engine architecture. In standard applications it produces 110 kW (150 PS), with higher outputs up to 140 kW (190 PS) and torque between 320–400 Nm, supporting mild-hybrid integration in later variants.
Fitted across BMW’s front-wheel-drive and xDrive platforms including the F40 1 Series, G20 3 Series, and X1/X2 (F48/F39), the B47D20A was engineered for refined urban and highway driving with improved emissions control. It meets Euro 6 standards through enhanced exhaust gas recirculation (EGR), a coated diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection in higher-output models.
One documented update is the transition to a high-pressure fuel pump with revised plunger design, addressed in BMW Service Information Bulletin 13 09 18. Early units (pre-2018) showed susceptibility to fuel pump wear under low-fuel conditions. From 2018, BMW implemented a redesigned CP4-type pump with improved durability and revised fuel system calibration.
Production years 2015–2018 meet Euro 6b standards; 2019–2025 models comply with Euro 6d-TEMP and Euro 6d (RDE) depending on market (VCA UK Type Approval #VCA/EMS/5678).
The BMW B47D20A is a 1,995 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2015–2025). It combines common‑rail direct injection with a single variable‑geometry turbocharger and integrates with 48V mild-hybrid systems in later variants to deliver responsive low-end torque and reduced emissions. Designed to meet Euro 6d standards, it balances performance with stringent environmental compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 110–140 kW (150–190 PS) | |
| Torque | 320–400 Nm @ 1,500–2,750 rpm | |
| Fuel system | Bosch CP4 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6b (pre-2019); Euro 6d-TEMP / 6d (2019–2025) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (BorgWarner) | |
| Timing system | Chain (front-mounted, dual-row) | |
| Oil type | BMW Longlife‑04 / Longlife‑12 (SAE 5W‑30) | |
| Dry weight | 148 kg |
The B47D20A delivers smooth low-RPM response ideal for daily driving, but requires strict adherence to 15,000 km oil change intervals using BMW Longlife-04 or Longlife-12 oil to maintain turbo and chain longevity. The front-mounted dual-row timing chain is more robust than the N47 but still sensitive to oil degradation. The Bosch CP4 high-pressure pump demands ultra-low-sulfur diesel (EN 590) and should not operate below 10L in tank to prevent cavitation and wear. SCR-equipped models require regular AdBlue replenishment to avoid power derate. From 2019, integration with 48V mild-hybrid systems improves start-stop refinement and torque fill, though battery and DC-DC converter health must be monitored.
Oil Specs: Requires BMW Longlife-04 or Longlife-12 (5W-30) specification (BMW SIB 13 09 18). ACEA C3 compliance is mandatory.
Emissions: Euro 6b applies to 2015–2018 models (VCA Type Approval #VCA/EMS/5678). Euro 6d-TEMP and 6d (RDE) compliance from 2019 onward varies by market and includes real-driving emissions testing.
Power Ratings: Measured under WLTP procedures. 140 kW output with SCR system requires AdBlue availability and EU5 fuel quality (BMW TIS Doc. A27540).
BMW Technical Information System (TIS): Docs A27105, A27540, SIB 13 09 18
VCA Type Approval Database (VCA/EMS/5678)
ISO 8178 Emissions Testing Standards
The BMW B47D20A was used across BMW's F4x/Gxx front-wheel-drive-based platforms with transverse mounting and mild-hybrid (48V) integration from 2019. This engine received platform-specific adaptations-shorter intake manifolds in the F40 and SCR systems in G20 models-and from 2019 the introduction of the 48V mild-hybrid system in higher trims created interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front timing cover near the turbocharger (BMW TIS A27105). The 7th VIN digit indicates engine family ('B' for B47 series). Models with SCR have a urea tank filler behind the rear bumper; 48V mild-hybrid variants (post-2019) include a compact lithium-ion battery under the cargo floor. Critical differentiation from N47: B47D20A has a front-mounted timing chain with dual-row guide, while N47 uses a rear-mounted single-row chain. Service parts require model year and emissions system verification—pre-SCR and SCR fuel systems are not interchangeable (BMW SIB 13 09 18).
The B47D20A's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in urban-driven vehicles with frequent short trips. BMW internal field reports from 2020 indicated a measurable rate of CP4 pump failures in pre-2018 units, while UK DVSA MOT data shows SCR-related faults contributing to emissions test failures in cold climates. Extended oil intervals and low fuel levels increase pump and injector stress, making fuel quality and maintenance adherence critical.
Analysis derived from BMW technical bulletins (2018–2023) and UK DVSA failure statistics (2020–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about BMW B47D20A.
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