M21D24 BMW M21D24

Дизельний двигун BMW M21D24 з турбонаддувом, відомий своєю надійністю та довговічністю при належному обслуговуванні.

Brand: BMW Type: Diesel Configuration: Inline-6 Production Years: 1983 - 1991 Production: Steyr, Austria
86 Brand engines
2 Modifications

Technical Specifications

Engine Displacement 2.4 L (2,443 cc)
Configuration Inline-6
Number of Cylinders 6
Valves per Cylinder 2
Power 113 - 115 л.с.
Torque 210 - 220 Н*м
Cylinder Bore 80.00 mm
Piston Stroke 81.00 mm
Compression Ratio 22.0:1
Firing Order 1-5-3-6-2-4
Fuel System Indirect Injection
Aspiration Turbocharged
Turbocharger Garrett T3
Intercooler No
Maximum RPM 4,800 rpm
Max Torque RPM 2,400 rpm
Valve Train SOHC
Timing Drive Belt
Timing belt replacement interval 60,000 km
Block Material Cast Iron
Head Material Aluminum
Lubrication System Wet sump
Cooling System Liquid cooling

Additional Information

Engine Family BMW M21 engine series
Manufacturing Plant Steyr, Austria
Successor M51D25

Maintenance

Engine Oil Capacity 6.5 L (with filter: 7 L)
Recommended Viscosity 10W-40
Oil Standard API CF-4
Recommended Brands Castrol GTX, Mobil Delvac, Shell Rotella
Oil Change Interval 10 000 km or 12 mo
Oil Filter 11421266773
Air Filter 13721730946
Replace every 40 000 km
Fuel filter 13321720101
Spark Plugs
Coolant Capacity 10.5 L
Coolant Type G11 (BMW Coolant)
Coolant Change Interval 100 000 km
Thermostat Opening Temperature 88°C
Operating Temperature 85°C
Max Operating Temperature 110°C
Critical Temperature 120°C
Annual Maintenance Cost 500-800 USD

Reliability

Reliability rating: 8/10

Expected lifespan: 400 000 km

Common problems

Problem Severity Mileage Repair cost
Timing belt failure High 60000-80000 km $500-1000
Turbocharger wear Medium 150000-200000 km $800-1500

Known defects

  • Early models had issues with head gasket failures

Tuning potential

Tuning potential: Medium | Max. safe power: 180 hp

Stage Power Torque Method Cost
Stage 1 130 hp 250 Nm ECU remap only
Reliability impact: Minimal 		$400
Stage 2 150 hp 280 Nm ECU, Exhaust
Required: Upgraded turbo, ECU remap
Reliability impact: Low 		$1500
Stage 3 180 hp 320 Nm -
Required: Bigger turbo, Intercooler, ECU remap
Reliability impact: Medium 		$3000

Popular modifications

  • ECU remap
  • Upgraded turbocharger
  • Performance exhaust

Tuning limitations

  • Stock internals limit power increase
  • Cooling system upgrades recommended for high power

Cars with the M21D24 engine

This engine was fitted to 1 model

Photo Brand Model Generation Production years
No photo
 BMW 3 Series 3 series (E30) 1982 - 1994

All modifications (2)

Vehicle Generation Modification Power Gearbox Drive
BMW 3 Series 3 series (E30) BMW 324d 2.4 л.с. 115 5-МКП 2WD 115 hp 5-МКП 2WD
BMW 3 Series 3 series (E30) BMW 324d 2.4 л.с. 115 4-Автомат 2WD 115 hp 4-Автомат 2WD

Interesting Facts

  • First BMW diesel engine with a turbocharger
  • Used in BMW's first diesel-powered cars

Applications

Total produced: unknown

Vehicle Generation Years Power Markets
BMW 5 Series E28 1983-1987 115hp Europe
BMW 3 Series E30 1985-1991 115hp Europe

Compatible transmissions: 5-speed Manual, 4-speed Automatic

Drive types: RWD

Fuel Economy

Fuel Type Diesel
Consumption (City) 9 L/100km
Consumption (Highway) 6.5 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 Pre-Euro
Particulate Filter (DPF) Absent
AdBlue Not Required

Comparison with competitors

Engine Brand Displacement Power Torque
OM617 Mercedes-Benz 3,005 cc 125 hp 250 Nm

Pros

  • Robust and durable design
  • Good fuel economy for its time

Cons

  • Limited power output
  • Higher maintenance costs due to timing belt