Like the previous 2-liter engine, this BMW M52B25 engine is also based on the M50 engine, but unlike its predecessor, it has less horsepower (22 hp less). Produced from 1995 to 2003. M52B25 in 1998 was recognized as the best engine in the United States and established on
Produced from 1995 to 2003. In 1998 the M52B25 engine was nominated as the best engine in the United States.
In 2000, the engine began to be gradually replaced by a new 2.5-liter six-cylinder M54B25, and a year later M52B25 motor release stopped.
M52B25 Engine Specs
| Manufacturer | Munich Plant |
| Also called | BMW M52 |
| Production | 1995-2001 |
| Cylinder block alloy | Nikasil-coated aluminum |
| Configuration | Straight-6 |
| Valvetrain | DOHC 4 valves per cylinder |
| Piston stroke, mm (inch) | 75 (2.95) |
| Cylinder bore, mm (inch) | 84 (3.3) |
| Compression ratio | 10.5 |
| Displacement | 2494 cc (152.2 cu in) |
| Power output | 125 kW (170 HP) at 5,500 rpm 125 kW (170 HP) at 5,500 rpm (TU) |
| Torque output | 245 Nm (181 lb·ft) at 3,950 rpm 245 Nm (181 lb·ft) at 3,500 rpm (TU) |
| Redline | 6,500 rpm |
| HP per liter | 68.2 |
| Fuel type | Gasoline |
| ECU | Siemens MS41.0 Siemens MS42.0 (TU) |
| Weight, kg (lbs) | ~165 (364) ~175 (386) |
| Fuel consumption, L/100 km (mpg) -City -Highway -Combined |
for E36 323i 13 (18.1) 6.7 (35.1) 9 (26.1) |
| Turbocharger | Naturally aspirated |
| Oil consumption, L/1000 km (qt. per miles) |
up to 1.0 (1 qt. per 750 miles) |
| Recommended engine oil | 0W-30, 0W-40, 5W-30, 5W-40, 10W-40 |
| Engine Oil Capacity, L (qt.) | 6.5 (6.9) |
| Oil change interval, km (miles) | 7,000-10,000 (4,500-6,000) |
| Normal engine operating temperature, °C (F) | ~95 (203) |
| Engine lifespan, km (miles) -Official information -Real |
– ~250 (155) |
| Tuning, HP -Max HP -No life span loss |
500+ – |
BMW M25B25 Engine Oil Capacity
The BMW M25B25 engine requires 6.9 quarts of 0W-30 oil with a filter replacement.
What Cars Have A BMW M25B25?
- BMW 323i E36
- BMW 523i E39
- BMW Z3 2.3 Roadster
BMW M52TUB25 Review
The BMW M52TUB25 engine appeared in 1999. It is an upgraded version of the BMW M52B25 engine. Cylinder capacity remained unchanged at 2.5 liters (2494 cu. Cm).
His camshafts received a double VANOS valve timing system. Now torque peak has shifted to 450 rpm below.
Engine power is 168 hp at 5500 rpm and torque of 245 Nm at 3500 rpm.
What Cars Have A BMW M52TUB25?
- BMW 323i E46
- BMW 523i E39
- BMW E36 / 7 Z3
BMW M52B25 Engine Problems
- Radiator & expansion tank leaks
- Water pump failure
- Rough idle from idle control valve
Valve cover cracks & oil leak - Dual-Vanos failure
In general, the engine’s internals are unbreakable. You should easily exceed the 200k mile milestone without having to replace any valves, chains, rods, cranks, or seals. While the engine and its components may be tortured to death, the supporting engine systems are more likely to give you trouble. The cooling system is susceptible to failure, including the water pump, radiator, expansion tank, and other components.
These engines are fantastic, and the internals will last you a long time. However, as the car grows older and becomes old, maintenance becomes more important, and supporting engine components will naturally wear out from use and tear. I’m sure you’re familiar with this if you own one of these cars. If you’re considering purchasing one, prepare to invest a lot of time on maintenance and save money in the bank for major repairs.
More typical problems of this engine are listed here.
