BMW N47 2.0 Diesel: Specs, Engine Code, ECUs & Maintenance
BMW · Engine information · U.S. & Canada
N47
2.0 diesel · Strong low-speed torque, compact package
The North American N47TU brings diesel pulling power to the 328d and X3 28d. Its single variable-geometry turbo and common-rail injection work with a sophisticated emissions system, all coordinated by Bosch EDC17 electronics.
Architecture
- Engine code
- N47D20O1 · N47TU/N47T
- Layout
- Inline-four · DOHC · 16 valves
- Block / head
- Aluminium / aluminium
- Bore × stroke
- 84.0 × 90.0 mm
- Cam drive
- Rear-mounted timing chain
- Turbocharger
- Single variable-geometry unit
Fuel & emissions
- Injection
- Common-rail direct diesel
- Injectors
- Solenoid-operated
- Fuel system
- Bosch high-pressure common rail
- Charge cooling
- Air-to-air intercooler
- Aftertreatment
- EGR · DPF · SCR with DEF
- Management
- Bosch EDC17 · BMW DDE
Engine controllers · Bosch EDC17C50/C56 and EDC17C76
BMW calls its diesel ECU the DDE. It controls injection quantity and timing, rail pressure, turbo vane position, EGR and regeneration. North American emissions software also supervises DEF/SCR operation, with NOx and particulate sensors communicating through their own electronics.
| Controller | Applications & timing | Technical distinction |
|---|---|---|
| EDC17C50 / EDC17C56 | Early North American applications, typically 2014–2015 | TC1797-based EDC17 generation. Service and programming catalogues can group these variants together; read the actual Bosch number and DDE identification. |
| EDC17C76 · DDE 7.4.2 | Later 328d applications, typically 2016–2018; installation varies by model | TC1793-based revision with different hardware/software; not a direct substitute for the earlier DDE. |
Identify the installed controller before choosing parts or software. Record the Bosch number, BMW DDE version, software level and injector correction data; do not rely on a generic “EDC17” description.
Selected U.S. & Canadian vehicles
| Model | Chassis | Model years | Engine / factory output |
|---|---|---|---|
| 328d / 328d xDrive sedan | F30 | 2014–2018 | N47D20O1 · 180 hp / 280 lb-ft |
| 328d xDrive Sports Wagon | F31 | 2014–2018 | N47D20O1 · 180 hp / 280 lb-ft |
| X3 xDrive28d | F25 | 2015–2017 | N47D20O1 · 180 hp / 280 lb-ft |
This guide covers the North American 2.0-litre diesel specification; overseas N47 ratings and ECU applications are not interchangeable.
Common issues & key risks
EGR-cooler leaks. Internal coolant leakage can combine with soot and create a fire risk on affected vehicles. Investigate unexplained coolant loss and check completion of the applicable recall by VIN.
Timing-chain wear. Rear-mounted chains and guides are a known N47-family concern. Persistent rear-of-engine rattles need specialist inspection; risk varies with build and revision, so inspect the fitted chain system.
Thermostat & DPF problems. Low operating temperature, short journeys and unresolved engine faults can prevent regeneration. Check temperature and exhaust-pressure readings before replacing a soot-loaded filter.
NOx & emissions sensors. Failed NOx sensors can trigger SCR warnings. Confirm sensor readings, wiring and DEF dosing; BMW issued coverage for eligible applications.
EGR deposits & intake flaps. Soot and oil deposits can restrict airflow or hinder flap movement. Inspect the intake and EGR system when performance drops or airflow faults return.
Glow-system faults. Hard cold starts or rough warm-up need checks of glow plugs, their controller and supply wiring. Repair underlying faults that can also interfere with emissions operation.
Keep it consistent: Use the approved low-ash oil for the VIN, maintain DEF quality and review oil intervals against operating conditions. Clean intake components when inspection supports it.
References
| Topic | Source |
|---|---|
| Engine and emissions | BMW N47TU technical training |
| 328d specifications | BMW USA: 3 Series sedan and wagon |
| X3 specification | BMW USA: 2017 X3 technical data |
| EGR service campaign | BMW SIB 11 17 18 |
| EGR-cooler recall & eligibility | BMW SI B01 05 20 · recall references |
| Timing-chain repair experience | Element Performance · N47 chain repair |
| DPF root-cause diagnosis | BMW SI B18 01 17 · reproduced bulletin |
| NOx-sensor concerns | BMW SI B01 19 18 |
| Glow-system diagnosis | BERU · glow-control faults |
| Photograph | N47D20 · Calinex · CC0 1.0. Wikimedia Commons. |
Model years refer to selected U.S. and Canadian applications. Equipment and software vary by build. Use current BMW service information for diagnosis and repair.
