M51D25 BMW M51D25
Дизельний рядний 6-циліндровий двигун з турбонаддувом, відомий своєю надійністю та економічністю.
86
Brand engines
10
Modifications
Technical Specifications
| Engine Displacement | 2.5 L (2,496 cc) |
| Configuration | Inline-6 |
| Number of Cylinders | 6 |
| Valves per Cylinder | 2 |
| Power | 143 - 150 л.с. |
| Torque | 300 - 330 Н*м |
| Cylinder Bore | 80.00 mm |
| Piston Stroke | 82.80 mm |
| Compression Ratio | 22.0:1 |
| Firing Order | 1-5-3-6-2-4 |
| Fuel System | Indirect Injection |
| Aspiration | Turbocharged |
| Turbocharger | Garrett T25 |
| Intercooler | No |
| Maximum RPM | 4,800 rpm |
| Max Torque RPM | 2,200 rpm |
| Valve Train | SOHC |
| Timing Drive | Belt |
| Timing belt replacement interval | 80,000 km |
| Block Material | Cast Iron |
| Head Material | Aluminum |
| Engine Weight | 210 kg |
| Dimensions (L×W×H) | null mm |
| Lubrication System | Wet sump |
| Cooling System | Liquid cooling |
Additional Information
| Engine Family | BMW M51 engine series |
| Manufacturing Plant | Steyr, Austria |
| Predecessor | M21D24 |
| Successor | M57D25 |
Maintenance
| Engine Oil Capacity | 6.5 L (with filter: 7 L) |
| Recommended Viscosity | 5W-40 |
| Oil Standard | ACEA B3 |
| Recommended Brands | Castrol, Mobil, Shell |
| Oil Change Interval | 10 000 km or 12 mo |
| Oil Filter | 11422247018 |
| Air Filter |
13721730946
Replace every 40 000 km |
| Fuel filter | 13321740985 |
| Cabin Filter | null |
| Spark Plugs | |
| Coolant Capacity | 10 L |
| Coolant Type | G11 (BMW Coolant) |
| Coolant Change Interval | 100 000 km |
| Thermostat Opening Temperature | 88°C |
| Operating Temperature | 90°C |
| Max Operating Temperature | 110°C |
| Critical Temperature | 120°C |
| Annual Maintenance Cost | 500-800 USD |
Reliability
Expected lifespan: 400 000 km
Common problems
| Problem | Severity | Mileage | Repair cost |
|---|---|---|---|
| Timing belt failure | High | 80000-120000 km | $500-1000 |
| Turbocharger wear | Medium | 150000-200000 km | $800-1500 |
Known defects
- Weak head gasket
- Turbocharger oil leaks
Tuning potential
Tuning potential: Medium | Max. safe power: 220 hp
| Stage | Power | Torque | Method | Cost |
|---|---|---|---|---|
| Stage 1 | 160 hp | 320 Nm |
ECU remap Reliability impact: Minimal |
$400 |
| Stage 2 | 180 hp | 350 Nm |
ECU, Downpipe Required: Upgraded intercooler, ECU remap Reliability impact: Low |
$1500 |
| Stage 3 | 200 hp | 400 Nm |
- Required: Bigger turbo, Upgraded fuel injectors Reliability impact: Medium |
$3000 |
Popular modifications
- ECU remap
- Intercooler upgrade
- Turbo upgrade
Tuning limitations
- Stock internals limit power increase
- Cooling system upgrades needed for high power
Cars with the M51D25 engine
This engine was fitted to 2 models
| Photo | Brand | Model | Generation | Production years |
|---|---|---|---|---|
|
No photo
|
BMW | 3 Series | 3 series (E30) | 1982 - 1994 |
|
No photo
|
BMW | 3 Series | 3 series (E36) | 1991 - 1998 |
|
BMW | 5 Series | 5 series (E34) | 1988 - 1995 |
|
|
BMW | 5 Series | 5 series (E39) | 1996 - 2003 |
All modifications (10)
| Vehicle | Generation | Modification | Power | Gearbox | Drive |
|---|---|---|---|---|---|
| BMW 3 Series | 3 series (E30) | BMW 325td 2.5 л.с. 143 5-МКП 2WD | 143 hp | 5-МКП | 2WD |
| BMW 3 Series | 3 series (E30) | BMW 325td 2.5 л.с. 143 4-Автомат 2WD | 143 hp | 4-Автомат | 2WD |
| BMW 3 Series | 3 series (E36) | BMW 325td 2.5 л.с. 6-МКП 2WD | 143 hp | 6-МКП | 2WD |
| BMW 3 Series | 3 series (E36) | BMW 325td 2.5 л.с. 5-Автомат 2WD | 143 hp | 5-Автомат | 2WD |
| BMW 5 Series | 5 series (E34) | BMW 518d 2.0 143 л.с. 6-МКП 2WD | 143 hp | 6-МКП | 2WD |
| BMW 5 Series | 5 series (E34) | BMW 520d 2.0 150 л.с. 6-МКП 2WD | 150 hp | 6-МКП | 2WD |
| BMW 5 Series | 5 series (E34) | BMW 525d 2.5 192 л.с. 6-МКП 2WD | 192 hp | 6-МКП | 2WD |
| BMW 5 Series | 5 series (E34) | BMW 530d 3.0 184 л.с. 6-МКП 2WD | 184 hp | 6-МКП | 2WD |
| BMW 5 Series | 5 series (E39) | BMW 525d 2.5 163 л.с. 6-МКП 2WD | 163 hp | 6-МКП | 2WD |
| BMW 5 Series | 5 series (E39) | BMW 525d 2.5 163 л.с. 5-Автомат 2WD | 163 hp | 5-Автомат | 2WD |
Interesting Facts
- One of the first BMW diesel engines with a turbocharger
- Known for its durability and longevity
Applications
Total produced: null
| Vehicle | Generation | Years | Power | Markets |
|---|---|---|---|---|
| BMW 5 Series | E34 | 1991-1996 | 115hp/143hp | Europe |
| BMW 3 Series | E36 | 1993-1998 | 115hp/143hp | Europe |
Compatible transmissions: 5-speed Manual, 4-speed Automatic
Drive types: RWD
Fuel Economy
| Fuel Type | Diesel |
| Consumption (City) | 9 L/100km |
| Consumption (Highway) | 6 L/100km |
| Consumption (Combined) | 7.5 L/100km |
| Real Consumption | 8 L/100km |
| Fuel Tank Capacity | 70 L |
| Range | 933 km |
| Cost per 100 km | 10-12 USD |
Emissions Standards
| Emission Standard | Euro 2 |
| CO₂ Emissions | 200 g/km |
| Particulate Filter (DPF) | Absent |
| AdBlue | Not Required |
Comparison with competitors
| Engine | Brand | Displacement | Power | Torque |
|---|---|---|---|---|
| OM606 | Mercedes-Benz | 2,996 cc | 177 hp | 330 Nm |
Pros
- Robust and reliable
- Good fuel economy for its time
Cons
- Outdated emissions standard
- Limited tuning potential compared to modern engines