BMW 525i Engine

BMW 525i Engine – Full Information

BMW is one of the biggest car brands in the entire automotive industry. It is mostly popular for its High-class luxury and maintaining the highest standards. The BMW 5 Series Cars were produced by BMW from 2003 till 2010. Also, the BMW 525i Engine delivers power via the rear wheels. Moreover, it is supplied by a 3-liter 6-cylinder naturally aspirated engine with an overhead camshaft. There are 4 valves per cylinder. Additionally, it has the power of 215 hp at 6,100 rpm and torque of 270 Nm at 2,400 to 4,200 rpm. 

A 6-speed manual transmission supplies the drive wheels with power. Also, the estimated curb weight is 1585 kg. The top speed is 248 km/h. BMW introduced several new electronic functions, including the iDrive infotainment system, head-up display, and active cruise control. Also active steering, adaptive headlights, night vision, lane departure warning, and voice control. The BMW 5 Series consist of a turbo engine, Six-speed transmission, and regenerative brake system.

Table of Contents

  • Full Specifications of BMW 525i Engine
  • Problems with BMW 525i Engine
  • BMW 525i Engine Maintenance
  • Conclusion

Full Specifications of BMW 525i Engine

BMW 525i Engine comes with 8.7 liters / 100 km fuel economy 32 UK mpg 27 US mpg (Average). Acceleration is 0-100 km / h in 7.5 seconds. Also, it has the highest speed of 151 mph and a curb weight of 3,196 pounds. BMW 525i consists of a 6-cylinder in-line naturally aspirated engine. Moreover, this engine produces a maximum output of 218 PS at 6,500 rpm. Also, it has a maximum torque of 250 Nm @ 2,745 rpm. Power is transmitted to the road via rear-wheel drive with a 6-speed manual transmission. Also, its equipped with a front suspension with a stabilizer and multi-link rear suspension coil springs. The BMW 5-series model is was sold as new from 2005 to 2007 and is later available as a used car.

Engine type with No. of cylinders = Inline 6

Model Engine = N52B25

Fuel type = Petrol

Fuel System = MPI or Multipoint Indirect injection system

Engine Orient = Longitudinal orientation

Engine size or Displacement = 2497 cm3 or 152.4 cu-in

No. of valves = 24 Valves

Compression Ratio = 11.0

Maximum power = 218 PS @ 6500 rpm

Maximum torque = 250 Nm @ 2750 rpm

Drive wheels = RWD

Transmission = 6-speed with Manual Transmission

Problems with BMW 525i Engine

System Faults of 525i Engine

The 5 Series with the 525i engine was a great car with all the necessary ingredients and components but had a plague with a few flaws including a variable valve timing issue. The VVT ​​system oil line could be leaking, causing the engine to rattle and an engine indicator light to come on. If your BMW 5 series is showing any of these symptoms, it can be the VVT ​​oil line problem. 

Intermediate Levers Problem 

Another common problem with this 5 series is the Valvetronic center levers, which are part of BMW’s innovative throttle system. Although the name is technical, it is quite easy to spot when facing this problem. Another common sign of this is an engine check light. In this case, the center levers need replacement.

Problem with the BMW 525i Fuel Pump 

Another common problem with the BMW 525i engine is the high-pressure fuel pump. This problem is related to the valve that is responsible for controlling the amount of fuel. Fuel flowing to the high-pressure fuel pump sometimes fails. In this case, the engine output is reduced and the engine switched off. The malfunction warning is displayed on the screen. This can be fixed by the replacement of high-pressure fuel pumps.

Crankcase Bearing bushing

This problem is related to a crankcase bushing that does not fit properly into the engine. This looks to be a minor problem, but the engine involved may need replacement. So it’s a good option to contact your dealer for further guidance.

Water Pump Short Circuit Problem

A short circuit in the water pump can cause a fire under the hood. A replacement of the pump can fix up the problem.

BMW 525i Engine Maintenance

The BMW 525i engine needs to be serviced regularly in order to remain fully functional. There are some standard procedures of maintenance that you can do on your vehicle. Also, there are some issues that are quite common. Here you can see the most common BMW 525i repairs. The BMW 525i engine is an essential part of your car. Regular maintenance is also essential to keep the engine efficient. Sometimes a complete replacement is essential, especially in the case of improper maintenance. Some of them are as follows.

  • Change of Oil filter 
  • Regular Engine Oil Change
  • Changing Starter motor  
  • Tire rotation service
  • Diagnosis of Air conditioning 
  • Change Brakes pad 
  • A regular check of Light of the Check engine
  • Timing belt change
  • Coolant change of BMW 525i Engine

Maintenance of the BMW 525i is essential. The driver faces a variety of weather conditions. The road conditions will also differ considerably from one location to another. Proper knowledge of all the technical components of the BMW 525i engine is a must. 


To summarise, the BMW 525i engine is an excellent and powerful car engine for your BMW 5 series car. Here we have detailed the full specifications, common problems, as well as the maintenance schedule. Following the BMW maintenance schedule properly, can avoid many common problems. Hope you find the total value in this. 

You can find similar interesting reading about BMW Active Hybrid 5 Engine, BMW 840i Engine Model, BMW Alpina B7 Engine. This was everything about the BMW 525i engine. 

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