In this brief article we are going to discuss what exactly is a ‘BMW chassis stabilization malfunction issue’, and how to diagnose this; what are its causes and how to deal with them effectively.
When you decide to buy a BMW, for a majority of buyers, German Engineering, Reliability and Robustness would be the top-most considerations. In pursuit of perfection and “Sheer Driving Pleasure”, BMW’s have become electronically complex over the years. But as the years go by, there are potential wear and tear issues that could pop up unexpectedly.
Because the electronics use sensors that are connected to mechanical components, and there is every chance that these connections might not be working properly.
If you are the owner of an older model BMW, a warning message would be cause for grave concern and worry to you. Your first thoughts might be –
“Will it be possible to figure out this complex electronic system without an expert?”
“Will I be able to get the parts for this older model?”
“Will I be forced to go to the dealer?”
“How big a hole is this repair going to burn in my wallet?”
If staying on budget is your first priority, then rushing down to your nearest BMW authorized dealer must be your last priority.
Even if you are not a trained mechanic yourself, there always is a less expensive way (compared to the dealer) to tackle the issue on your own. As with all issues that come up in life the wisest thing to do would be to NOT PANIC and understand what may have caused it in the first place.
What is a ‘BMW chassis stabilization malfunction’?
A ‘BMW chassis stabilization malfunction’ error code is when your BMW is basically telling you that it detects that the vehicle is likely to swerve out of control, and that the safety control systems that were supposed to correct this, namely, the DSC and DTC, are malfunctioning currently.
Your BMW is therefore advising you to be extra-cautious of this potential threat by asking you to drive at lower speeds and avoid sudden braking.
But, at the same time, during this malfunction, the BMW Chassis Stabilization control system has moved to a “Fail-Safe” mode where the system has decided to limit vehicle throttle and apply braking where it feels necessary in order to limit vehicle speed and avoid instability.
What does this BMW chassis stabilization malfunction typically look like ?
The BMW Chassis Stabilization Malfunction car diagnostic warning message typically shows up on the Center Display as –
“ Chassis Function Restricted
Consult Service Center ”
Other common symptoms along with BMW Chassis Stabilization malfunction would be:
· Reduction in engine power and vehicle speed
· Yellow ‘Check engine’ Light flashing.
· The Vehicle going into limp mode
· Parking Brake Limited message
· Yellow DSC Light Flashing
What is Chassis Stabilization?
Chassis Stabilization refers to the vehicle’s computer detecting instability in the vehicle movement based on all the sensors that are hooked up to this system.
For example, the wheel/ABS sensors detect when any particular wheel spins as a result of the tyre losing grip due to the kind of surfaces or speed.
The two systems that do this detection are:
- DSC – DSC stands for dynamic stability control—a feature that BMW vehicles are famous for worldwide.
The DSC is a control system that uses several different sensors and detection techniques to allow your BMW to optimize your driving experience based on your particular driving style.
It is not only a performance optimization system, but also as a safety system that controls the speed of the vehicle. While controlling speed, the system takes into account road terrain that might potentially cause wheel spin or send your car drifting out of control.
Issues with the DSC system are not a perennial problem of BMW’s, but nonetheless, it’s important to deal with the issue promptly since it is potentially hazardous to drive under specific conditions without the DSC system properly activated.
- DTC- Dynamic Traction Control allows for a slightly increased, but controlled amount of wheel slip (or ‘Drift’ in other words!), therefore providing a dynamic driving mode with greater traction at the wheels and the DSC would be controlling stability of the BMW at the same time.
The reasoning is that a small amount of spin at the driving wheels would improve traction when taking off from a standstill in either snow and ice or on loose-sand type of terrain.
Common BMW models that may face this issue
BMW 3 Series 335i, X5, X
What causes a BMW Chassis Stabilization Error?
It would be useful to tackle the BMW Chassis Stabilization Error causes in the order of most relevant – to – least relevant. In that order, the usual suspects would be:
- The most directly connected systems, which are the DSC and DTC systems
In this sort of situation, it is most likely that one or more of the following directly connected systems would not be functioning properly. This diagnostic detection would have triggered the chassis stabilization malfunction message to display. The directly connected systems to the DTC are:
- Anti-lock Brake System (ABS fault)
- The suspension
How do I Fix my BMW Chassis Stabilization malfunction?
The common sense way to do it –
- If the chassis stabilization malfunction warning message had appeared whilst driving then
- Safely slow down the speed of your BMW and park at a safe spot.
- Turn off the ignition and wait for five to six minutes.
- Now, turn on the ignition and start your BMW engine.
- In a majority of cases, this procedure would temporarily do a warning light reset. Out of these, in many cases, you might get lucky and be able to eliminate the warning altogether.
- If the above procedure did not fix the problem then you would need to do some deep diving. Ideally, you could do this in your garage or parking spot.
In a majority of cases, the car would be still drivable after going into the ‘limp-home’ model allowing to slowly drive without too much acceleration.
- To start the next level of fault-finding, first see whether any other warning lights are on.
- “ABS warning light”. First identify which ABS sensor is not working. ABS sensor replacement may cost around $150. The ABS sensor problem could also be as a result of
- The ABS ring being rusted/worn-out/missing teeth
- Drive-shaft corrosion that leads to ABS ring being pushed to the sensor contact
- “Check engine warning light” is on. This could be related to either engine fluids or filters that were due for replacement. You may need to go through all the checkpoints
- If all these measures did not eliminate the warning then it is time to look into more complex potential components like:
- The DSC module and DSC pump
- The Alternator
- Wheel speed sensor
- Wiring harness
- Brake light switch
- Battery State of Charge
- Transmission lubrication/heating issues
- Suspension joints and shock absorbers for wear and tear
For these last items you would best benefit from the expertise of a mechanic, either through Youtube videos or personally.
The Proper Diagnostic way to do it
This is what your BMW dealer would have done to inspect and diagnose almost every type of warning issue. Try to get hold of a BMW scanner and use this to read fault codes through the OBD-II port which is located under the dashboard. It would be wise to avoid using Generic OBD-II scanners available online due to the possibility that it may show no BMW fault codes even when a fault is present.
It would be best to utilize the “auto-scan” option in the BMW Scanner to perform a complete system check. If the “auto-scan” option is not available, then read fault codes from the DME and EGS modules.
Record all the fault codes that show as PRESENT or CURRENT.
Once this is done, you are definitely better off than where you started. You are now in a good position to start diagnosing chassis problems.
In this brief article we discussed the various BMW chassis stabilization malfunction issues, how to diagnose them and how to deal with them effectively.
If you have any questions or comments please let us know.
Frequently Asked Questions (FAQs): BMW Chassis Stabilization Malfunction?
Why does my BMW go into limp mode?
In a BMW, the limp mode can be considered as a default symptom indicating a variety of issues. The most common reasons for a BMW going into limp mode are: Chassis Stabilization malfunction (as discussed above in this article) Deteriorated engine components, including wiring harnesses and sensors. Less than ideal engine boost control, a malfunctioning transmission system, including its wiring harnesses.
How do you clear chassis stabilization on a BMW?
As discussed in this article simply restarting your BMW might sort the issue. If not, there may be multiple issues that led to the Chassis Stabilization error. Please read through this article from the beginning.
Why is the chassis important?
A vehicle chassis is needed primarily to support the different system components as well as the payload. It also has the additional function of maintaining a certain level of vehicle stiffness, particularly while cornering or traversing uneven surfaces. In short the chassis acts as a kind of safety system for the entire vehicle.