BMW N46B20TU2OL — 2L Engine
2L · 170 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | N46 B20 TU2oL |
| Capacity | 1995 cc |
| Idle speed | 700 rpm |
| Minimum | 15.0 bar |
| Differential limit between cylinders | < 2.0 bar |
| Oil pressure | > 1.0 bar/rpm |
| Oil pressure | 4.0 - 6.0 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch ME 17.2.1 / DME MV1746 |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Spark plugs (make and type) | NGK IZFR6H11 Bosch FR7KPP322 |
| Spark plug gap | 1.1 mm |
| Fuel pump pressure | 3.5 bar |
| Injection pressure/system pressure | 3.5 ± 0.2 bar |
| Lambda | 0.97 – 1.03 |
| CO at fast-idle speed | < 0.3 % |
| Fuel pump pressure | 3.6 bar |
Cooling system
| Cap pressure | 1.8 - 2.1 bar |
Electrical
| Battery | 55/80 Ah |
| Alternator | 110/150 A |
Capacities
| Engine sump, incl. filter | 4.25 l |
| Manual transmission | GS6 17BG |
| Gearbox refill | 1.3 - 1.4 l |
| Automatic transmission | GA6 L45R |
| Gearbox refill | 8.2 l |
| Differential | 0.8 (168L) l |
| Air-conditioner refrigerant | 590 ± 10 g |
| Air-conditioner compressor oil | 150 ± 10 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 30 Nm |
| Cylinder head bolts — Stage 2 | 90 ° |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 45 ° |
| Cylinder head (M9 bolts) — Stage 1 | 10 Nm |
| Cylinder head (M9 bolts) — Stage 2 | 90 ° |
| Oxygen sensor | 50 Nm |
| Spark plugs | M12: 23 ± 3 M14: 30 ± 3 Nm |
| Main bearing cap — Stage 1 | 20 Nm |
| Main bearing cap — Stage 2 | 70 ° |
| Big-end bearing cap — Stage 1 | 20 Nm |
| Big-end bearing cap — Stage 2 | 120 ° |
| Oil plug | 25 Nm |
| Oil separator | 17 Nm |
| Flywheel | 130 Nm |
| Crankshaft gearwheel | 300 Nm |
| Automatic transmission drain plug | 14 Nm |
| Manual transmission drain plug | 25 Nm |
| Front hub | M12: 110 Nm |
| Rear hub | M27: 420 M24: 250 Nm |
| Wheel bolts | 120 Nm |
Emissions
| Emission code | 70/220*2003/76B |
| Emission standard | Euro 4 |
| CO2 average | 157 g/km |
| CO | 0.054 g/km |
| HC | 0.071 g/km |
| NOx | 0.059 g/km |
| Emission standard | Euro 4 (01/2007 ->) |
| CO2 average | 161 - 165 g/km |
| CO | 0.079 g/km |
| HC | 0.076 g/km |
| Emission code | 715/2007*692/2008A |
| Emission standard | Euro 5 (01/2009 ->) |
| CO2 average | 169 g/km |
| CO | 0.321 g/km |
| HC | 0.073 g/km |
| NOx | 0.041 g/km |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.