BMW N47 engine problems and causes [ How to Fix ]

The BMW N47 is a 4-cylinder in-line engine, successor to the BMW M47. You can have the 1.6-liter or 2.0-liter variant with an output of 94 hp and 204 hp respectively. Since it is a modern engine, it meets strict emission standards based on DPF and EGR technology. This is the reason why the engine has some problems. Below you will find a description of some minor and major problems you may have with this engine.

Premature failure of the timing chain

In this engine, the timing chain faces excessive wear, resulting in premature failure. Also, the chain can collapse while driving the car, which can cause serious damage to the car. In this case, you may need to replace the motor.

A common sign of a faulty timing chain is rattling noise from the rear of the engine. You can find this chain between the transmission and the engine. So changing the chain is the only solution, which requires removing the entire engine or disconnecting the transmission.

EGR sensor malfunction

The purpose of the EGR system is to help the vehicle meet stringent emissions. Basically, this system circulates part of the exhaust gases towards the engine intake in order to reduce the amount of nitrogen oxide.

Generally, this system does not work properly when the sensor accumulates a lot of threads. As a result, an increasing amount of exhaust air enters the inlet. Therefore, hot exhaust gases can melt the plastic manifold. As a result, you experience a significant reduction in boost pressure.

If the EGR valve is fully open, it can cause soot to build up on various engine components, such as the glow plugs, intake manifold, and fuel injectors. Therefore, the air flow is reduced due to the restrictions. Therefore, it takes a while for your car to start in winter.

DPF does not work

The function of the DPF is to filter out diesel or soot particles. Generally, it works at high temperatures. Also, during short trips, this component does not come out enough to remove exhaust gases and soot. As a result, it causes soot to build up on various parts, such as the engine’s glow plugs, the EGR sensor, the DPF sensor, and the turbo.

Power steering pump failure

On these engines, the power steering is not as reliable. If you find oil spills around the steering oil or the reservoir cap, the power steering pump is likely to fail.

Oil leaks from crankcase breather hose at high temperatures

Generally, the crankcase breather hose tends to leak at high temperatures. A common indicator of this problem is oil leaking from the end of the hose. However, you can solve this problem by installing a stiffer plastic hose instead of a rubber one.

conclusion

In summary, if you are the owner of a BMW N47 and you are facing these problems, we suggest that you take your vehicle to a mechanic immediately and have these problems resolved. By reading this article, you can get a better idea of ​​these issues. This will help you take better care of your vehicle.