| 28 version of the engine | 123456 | | Typ | 520i | 520i | 523i | 523i | 525i |
| Engine | benzynowy | benzynowy | benzynowy | benzynowy | benzynowy |
| Type of injection | pośredni MPI | bezpośredni | pośredni MPI | bezpośredni | pośredni MPI |
| Engine Code | M54B22 | N43B20 | N52B25 | N53B25 | M54B25 |
| Years of mounting | 2003-2007 | 2007-2010 | 2005-2007 | 2007-2010 | 2003-2005 |
| Cylinders/valves | R6/24 | R4/16 | R6/24 | R6/24 | R6/24 |
| Displacement [cm³] | 2171 | 1995 | 2497 | 2497 | 2494 |
| Power [kW/PS/RPM] | 125/170/6250 | 125/170/6700 | 130/177/5800 | 140/190/6100 | 141/192/6000 |
| Torque [Nm/RPM] | 210/3500 | 210/4250 | 230/3500-5000 | 240/3500-5000 | 245/3500 |
| Timing gear | łańcuch | łańcuch | łańcuch | łańcuch | łańcuch |
| Particle filter | - | - | - | - | - |
| Gearbox | manual. 6b/aut. 6b | manual. 6b/aut. 6b | manual. 6b/aut. 6b | manual. 6b/aut. 6b | manual. 6b/aut. 6b |
| Drivetrain | tylny | tylny | tylny | tylny | tylny |
| Brakes, front/rear | tarcz. went./tarcz. | tarcz. went./tarcz. | tarcz. went./t. went. | tarcz. went./t. went. | tarcz. went./t. went. |
| Front suspension | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe |
| Rear suspension | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe |
| Curb weight [kg] | 1485/1495 | 1460/1490 | 1470/1490 | 1500/1525 | 1490/1500 |
| Body dimensions [mm] | 4841/1846/1468 | 4841/1846/1468 | 4841/1846/1468 | 4841/1846/1468 | 4841/1846/1468 |
| Luggage capacity [l] | 520 | 520 | 520 | 520 | 520 |
| Acceleration 0-100km/h (0-62mph) [s] | 9,0/9,9 | 8,7/9,6 | 8,5/9,3 | 8,2/8,7 | 8,5/9,3 |
| Top speed [km/h] | 230/226 | 224 | 235/232 | 237/236 | 238/233 |
| Fuel cons. (city/h-way/comb.) [l/100km] | 13,9/7,5/9,8 | 9,4/5,4/6,9 | 13,4/6,9/9,3 | 10,3/5,9/7,5 | 14,1/7,5/9,9 |
| Fuel tank capacity [l] | 70 | 70 | 70 | 70 | 70 |
| Ratio kg/PS | 8.74/8.79 | 8.59/8.76 | 8.31/8.42 | 7.89/8.03 | 7.76/7.81 |