M73TUB54 is a popular gasoline engine, the use of which is widespread in the case of BMW cars. It has a working volume of 5.4 liters, as well as a power figure of 326 hp. In form is V-shaped and has a set of 12 cylinders (2 valves on each). If we talk about the consumption of the described engine, it can not be called economical. The exact figure depends on the predominant area of operation, but with average driving in the city and on the highway for 100 km this motor “will eat” about 13-14 liters. It is recommended to use AI-95 gasoline.
Most of the powertrains used for BMW vehicles are quite reliable. Problems, as a rule, can arise in case of incorrect maintenance. The M73TUB54 engine has its own nuances in this regard. Basically, all shortcomings arise from the oil level, which many drivers check not as often as they should. Thus, valve burnout happens, which is the most common problem. According to the manufacturers of the power unit itself, oil consumption should not exceed 800 ml per 1000 kilometers. Periodically, you will face the need to change the oil seals. In general, this motor is not fastidious in maintenance and with the right approach to diagnostic procedures you will not experience any difficulties with it.
In the field of engine repair, it is very important that spare parts are affordable. The described motor allows you to look at this issue from several points of view. On the one hand, each part you can buy in many places without any restrictions. However, the price of the components of the power unit often forces car owners to look for all kinds of analogs.
As far as the oil to be injected is concerned, a rather large variety of variations can be found. This variation exists due to the fact that the described engine is not fastidious. The main principle is that the oil must be synthetic. Lubricants of mineral type are not suitable.
Engine specifications M73TUB54
| Power, hp. | 326 |
| Fuel type | AI-95 gasoline |
| Volume, cm*3 | 5379 |
| Maximum torque, N*m (kg*m) at rpm. | 490 (50) / 3900 |
| Fuel consumption, l/100 km | 13.8 |
| Engine type | V-twin, 12-cylinder. |
| CO2 emission, g/km | 327 |
| Cylinder diameter, mm | 85 |
| Number of valves per cylinder | 2 |
| Maximum power, hp (kW) at rpm. | 326 (240) / 5000 |
| Blower | No |
| Compression ratio | 10 |
| Piston stroke, mm | 79 |
Comparison with M73B54
M73TUB54 is a kind of evolution of the M73B54 engine. There are several significant differences that put the described engine a step above its “ancestor”. One of them is a more economical fuel consumption. On average, the difference will be about 3 liters per 100 km. Also, the new engine runs on AI-95 gasoline, unlike the 98 required for the M73B54.
Tuning
Power unit M73TUB54 has impressive factory characteristics, so it is very rarely subjected to tuning. But if you consider this possibility, then first of all, you should change the control unit, installing instead of it a more modern part. This is able to give the engine some gain in power. As an option, it is possible to bore cylinder liners. However, this will not give tangible changes for the better. The most significant power upgrade is made by installing injectors taken from sporty versions of BMW cars. In most cases, they all fit without any modifications.
Sooner or later, the owner of a car with a M73TUB54 engine installed inside faces the need to make major repairs. However, in this case, a more affordable option is to purchase a contract motor.
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