The BMW

BMW

Bayerische Motoren Werke AG is a German automobile, motorcycle and engine manufacturing company founded in 1916. It also owns and produces the Mini marque, and is the parent company of Rolls-Royce Motor Cars. BMW produces motorcycles under BMW Motorrad and Husqvarna brands...

 M54 is a straight-6

Straight-6

The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...

 engine, debuting in the year 2000. It is an evolution of the BMW M52

BMW M52

The BMW M52 is a Straight 6 piston engine. Displacement ranges from 2000 cc to 3200 cc. It is a DOHC 24-valve engine, originally introduced with VANOS Variable Valve Timing. It replaced the BMW M50 engine in 1994 and was replaced in 2001 with the BMW M54 engine...

. The engine has Double VANOS

VANOS

VANOS is an automobile variable valve timing technology developed by BMW in close collaboration with Continental Teves. VANOS varies the timing of the valves by moving the position of the camshafts in relation to the drive gear...

 variable valve timing

Variable valve timing

In internal combustion engines, variable valve timing , also known as Variable valve actuation , is a generalized term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine...

 to adjust timing of both intake and exhaust valves.
The 2.2 L (2171 cc/132 in³) M54B22 produced 170 hp (125 kW) at 6100 rpm and 155 ft·lbf (210 Nm) of torque at 3500 rpm.

Applications:

• 2001-2006 E46
  BMW E46
  The BMW E46 is the fourth generation of the 3 Series compact executive cars produced by BMW, produced from 1998 when it succeeded the BMW E36 until it was replaced by the BMW E90 in 2005....
  
   320i/320Ci
• 2001-2003 E39
  BMW E39
  The BMW E39 is the BMW 5 Series made between 1995 and 2003. The E39 was the successor of the BMW E34 in 1995, and itself was replaced by the E60 platform in 2003. Sales to Germany and the United Kingdom began in 1995, and by 1996 sales to the rest of the world had commenced. A mid-generational...
  
   520i
• 2001-2002 E36
  BMW E36
  The BMW E36 is the third generation of the 3 Series compact executive cars produced by BMW. It was introduced in late 1990 for Europe and in late 1991 for US and Canada. It was the successor to the E30 3 Series and was eventually replaced by the E90 3 Series in 2005, though E36 coupes were still...
  
   Z3 2.2i
  BMW Z3
  The BMW Z3 was the first modern mass-market roadster produced by BMW, as well as the first new BMW model assembled in the United States. The Z3 was introduced as a 1996 model year vehicle, shortly after being featured in the James Bond movie,...
  
  
• 2003-2005 E85
  BMW E85
  The first-generation of BMW Z4 was designed by Danish BMW-designer Anders Warming for Silas Acosta by request. The Z4 was introduced at the Paris Auto Show in 2002, and went on sale in November of the same year for the 2003 model year. It is a physically larger, completely redesigned successor to...
  
   Z4 2.2i
  BMW Z4
  The BMW Z4 is a rear-wheel drive sports car by the German car maker BMW. It follows a line of past BMW roadsters such as the BMW Z1, BMW 507, BMW Z8, and the BMW Z3. The Z4 replaces the Z3. First generation production started in 2002 at BMW USA's Greer, South Carolina plant, with production of both...
  
  
• 2003-2005 E60/E61
  BMW E60
  The BMW E60 is the BMW 5 Series automobile, replacing the BMW E39 in 2003. It was replaced by the BMW F10 from March 2010. The E60 was available in both sedan and station wagon platforms....
  
   520i

The M54B25 is a 2.5 L (2494 cc) engine with an 84 mm (3.3 in) bore and 75 mm (3 in) stroke.