Technical Support
BMW X5 Rear Suspension Troubleshooting
BMW X5 Rear Suspension Troubleshooting
The BMW X5 is one of the most popular luxury SUVs on the market.bmw x5 rear suspension air bag It's a highly advanced vehicle with a self-leveling air suspension for the rear axle. This feature allows the BMW to keep its ride height regardless of the cargo load being carried. The air suspension also allows for easier towing of larger boats and horse floats. Unfortunately, the self-leveling system isn't immune to problems and issues will inevitably arise from time to time.
When the air suspension fails, your BMW will experience noticeable sagging in the back.bmw x5 rear suspension air bag It can also feel unstable when driving on a bumpy or uneven surface. If the sagging persists, there may be an issue with the height sensor or compressor. Fortunately, these problems are easy to diagnose and repair, saving you the cost of a replacement vehicle or costly repairs.
There are a few different options to address this issue and we'll start with the most likely culprit - the compressor. The compressor on the BMW X5 is an electro-hydraulic pump that is powered by power steering fluid. The hydraulic pressure from the pump is controlled by a small computer that uses data sent in from various sensors, including the stability control, steering angle sensor and lateral acceleration sensors.
If the sagging persists, check that there is a charge in the compressor's reservoir. If not, the compressor may be overheating and not producing sufficient air volume to inflate the air bag springs. Alternatively, the compressor may simply have worn out and is not able to keep up with the vehicle's need for air.
Another option is to inspect the lower "wishbone" of the suspension. This large cast piece is generally reliable, but there are some wear points to look for. The thrust arm's inner bushing is particularly susceptible to wear as it carries most of the suspension's load. Inspect this part for a greasy/oil residue and look for the ball joint to have excessive play.
Another common issue is a hissing sound while lowering the car. This is typically caused by water in the air lines and can be solved by replacing the air drier or a new air filter.
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