Pressure, Vacuum and Temperature Specifications
| Bar, Absolute Value The charging pressure indicator in the vehicle tachometer shows charging pressure in bar absolute pressure. | Bar, Excess Pressure Special tool 9103/2 (pressure guage) shows changing pressure in bar above atmospheric pressure. | |
| Air Pressure at Sea Level | 1 Bar (bar) | 0 Bar (bar) |
| Boost Pressure (M 44.51/52 | 1.75 +/- 10% at 3,000 Bar At RPM (bar @ rpm) | 0.75 +/- 10% at 3,000 Bar At RPM (bar @ rpm) |
| Boost Pressure (M 44.51) With engine type M 44.51 the boost pressure drops after 3,000 rpm to the specified value. | 1.52 +/- 0.03 at 5,800 Bar At RPM (bar @ rpm) | |
| Boost Pressure (M 44.52) With engine type M 44.52 the boost pressure remains constant until 5,800 rpm then drops after this value has been passed. | 1.75 at 5,800 Bar At RPM (bar @ rpm) |