Power steering integrity check

There are a few things to look out for on BMW power steering systems.

Hose Leaks

Leaks usually occur at each location where BMW uses hose clamp. The crimped clamps do their job for a long time but they cannot be adjusted to compensate for shrinkage in the rubber hoses over time. TEM will examine the two connections on the bottom of the reservoir and where the reservoir feed line that connects to the pump. It's possible to cure most leaks by replacing the clamps, but the leak may actually be due to the hose itself. In that case, TEM will replace the hose, if the connections on the bottom of the reservoir may break off the plastic nipples. If this occurs the reservoir will need to be replaced.

Rack Seal Failure

This type of leak is usually caused by simple wear and tear, but can be aggravated by a lack of fluid changes or persistent driving with unbalanced or defective tires or other suspension components that result in a shimmy in the steering wheel. The first sign of this problem is usually the pump wailing in turns as the low fluid level pulls air into the pump. If the seals fail, the tie rod boots fill up with oil. Give them a squeeze and a jiggle -- if you hear or feel any fluid in the boots, you need to replace the steering rack.

Corrosion or physical damage of cooling coil / return line

The BMW power steering system fluid is cooled by passing it through a cooling coil built into the return line. This pipe must be exposed to cooling airflow to do its job so it is not behind any protective cover. This means it's exposed to road debris, salt, and moisture. If significant corrosion or dents are noted during the inspection the return line should be replaced.

What TEM Can do?

Depends on the result of the integrity check, TEM will carry out repairs ranging from Power Steering Fluid Flush to Steering Rack Replacement/Repair.