Compared to the S52, which was mounted on the BMW M3 in the rear of the E46, including the Z3M and Z4M roadsters and coupes, the BMW S54B32 is a more efficient and high-revving version of the engine.
In 2001, the BMW S54B32 engine emerged as the top engine in the “from 3.0 to 4.0 liters” category of the International Powertrain Competition. It continued to hold this title every year until 2006. He was included in the Ward’s 10 Best Engines list in 2001 and stayed there until the end of 2004.
Specifications
| Manufacturer | Munich Plant |
| Also called | S54 |
| Production years | 2000-2011 |
| Cylinder block alloy | cast iron |
| Fuel system | injector |
| Configuration | inline |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 91 |
| Cylinder bore, mm | 87 |
| Compression ratio | 11.5 |
| Displacement, cc | 3246 |
| Power output, hp | 315 /7400 rpm 325 /7400 rpm 333 /7900 rpm 343 /7900 rpm 360 /7900 rpm |
| Torque output, Nm / rpm | 340 /4900 rpm 350 /4900 rpm 355 /4900 rpm 365 /4900 rpm 370 /4900 rpm |
| Max engine speed, rpm | 8000 |
| Fuel type | petrol |
| Euro standards | Euro 3 |
| Weight, kg | 149 |
| Fuel consumption, L/100 km (for E46 M3) — city — highway — combined |
17.8 8.4 11.9 |
| Oil consumption, gr/1000 km | up to 1000 |
| Recommended engine oil | 10W-60 |
| Engine oil capacity, liter | 6.5 |
| Normal engine operating temperature, °C | ~90 |
| Engine lifespan, km | ~400 000 |
Disadvantages of the S54B32 engine
The standard M54’s high oil consumption is not present in the S version. On the other hand, if such an issue arises, the valve stem seals or rings are the cause. Overheating can also occur occasionally. The cooling system’s air locks are to blame for this. Additionally, contamination of the radiator itself, damage to its lid, or issues with the pump or thermostat could be the cause.
Although this series’ unit has an amazing resource, it is important to consider the mode in which the M3 E46 models were frequently used. Any “surprises” can be anticipated based on this and the motor itself. For instance, the timing chain, liners, and tensioners must all be replaced after passing M3 an average of 150,000 kilometers. It should be mentioned that copies published prior to 2003 are more likely to have these issues. These illnesses do not affect more recent versions.
An additional significant fact. You shouldn’t break the terms of the S54B32’s operation if it was purchased in good working order. This includes pouring someone else’s oil and postponing its replacement as well as general maintenance and inspection.