The BMW B47C20B is a 1,995 cc, inline — four turbo — diesel engine produced between 2015 and 2020. It succeeded the N47 series with enhanced efficiency, reduced emissions, and improved refinement. Featuring high — pressure common — rail injection (up to 2,000 bar), a variable geometry turbocharger (VGT), and dual overhead camshafts, it delivers outputs from 110 kW (150 PS) to 140 kW (190 PS), with torque between 320 Nm and 400 Nm.
Fitted to models such as the F20 1 Series, F30 3 S…
Production years 2015–2017 meet Euro 6b standards; 2018–2020 models comply with Euro 6d-Temp depending on market .
The BMW B47C20B is a 1,995 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2015-2020). It combines high-pressure common-rail injection with a single variable-geometry turbocharger to deliver responsive low-end torque and improved emissions performance. Designed to meet Euro 6b and 6d-Temp standards, it balances real-world economy with stricter 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 @ 1,500–2,500 rpm | |
Fuel system | Bosch CP4 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6b (pre-2018); Euro 6d-Temp (2018–2020) | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (BorgWarner) | |
Timing system | Chain (front-mounted; revised tensioner design) | |
Oil type | BMW Longlife‑04 / Longlife‑12 (SAE 5W‑30) | |
Dry weight | 148 kg |
The BMW B47C20B was used across BMW's F20/F30/G20 platforms with longitudinal mounting and shared architecture with MINI for transverse applications. This engine received platform-specific adaptations-shorter intake manifolds in the F20 and revised cooling circuits in the G20-and from 2019 the facelifted G20 LCI models adopted the B47TU variant with updated EGR routing, creating interchange limits. Partnerships allowed MINI's Cooper D models to use a transverse-mounted version with shared fuel and turbo systems. All adaptations are documented in OEM technical bulletins.
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The B47C20B offers improved refinement and emissions over the N47, but early models (2015-2017) had reliability concerns, particularly high-pressure fuel pump wear. Later revisions (post-2018) improved pump durability and EGR management, so well-maintained examples can be robust. Regular servicing and using high-quality oil (5W-30 BMW Longlife-04/12) greatly enhance longevity.
The most documented issues are high-pressure fuel pump degradation, turbo actuator sticking, and EGR/intake carbon buildup. Other concerns include oil leaks from valve cover gaskets and occasional AdBlue system faults. These are well-documented in BMW service bulletins, particularly SIB 13 02 18 and SIB 14 03 19.
This 2.0L diesel was used in BMW's F20 1 Series (118d, 120d), F30 3 Series (318d, 320d), and early G20 3 Series (320d). It also powers the MINI Cooper D (F56) in transverse configuration. Most units from 2015-2017 meet Euro 6b, while 2018-2020 models comply with Euro 6d-Temp depending on market.
Aftermarket ECU tuning is common on the B47C20B platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent. In a 320d (140 kW) from 2018-2020, real-world consumption averages ~5.8 L/100km (city) and ~4.3 L/100km (highway), or about 52 mpg UK combined. Smaller models like the 118d achieve slightly better economy. Expect 50-58 mpg (UK) on mixed driving for a well-maintained B47C20B.
Yes. The B47 series is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, resulting in severe internal damage. The front-mounted chain system is more robust than the N47, but regular inspection per BMW guidelines remains critical to prevent catastrophic failure.
BMW specifies a 5W-30 synthetic oil meeting BMW Longlife-04 or Longlife-12 specification. Use only high-quality oils designed for turbocharged diesels and change every 12,000-15,000 km to ensure proper lubrication of the fuel pump, turbo, and chain system, minimizing wear and soot accumulation.
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Regulation (EC) No 715/2007
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