Changing Front Ride Height Sensor 2009 Exclusive

[jaysams80]

Can anyone offer advice on this job please? Can it be done without removing subframe? Is it a straight swap without needing a Lexia to programme anything?

Thanks.

[paul.h]

If you are just changing the sensor and not the arm clamp on the anti roll bar, you would like to think it is just a case of unclipping the sensor arm, undoing the electrical connector and then unbolting the sensor. The suspension height ought not to change when the new sensor is put on as long as the anti roll bar clamp has not been moved, so there might be no need for diagnostics. The sensor arms can break and these are available from Citroen without needing the sensor.

 

However, the picture of the front sensor in the service box procedures shows the sensor from above inside the engine bay but does not have a procedure for it. The time to do the job though is nearly 2 hours plus extra time to check the suspension heights, so I am not sure how much work is needed to replace the sensor. There is a procedure in the RTA manual and that has the subframe being lowered slightly so it looks as if it is a big job.

 

Before touching the height sensor, you should raise the car to the max height and then disconnect the battery so the pump will not run. Use axle stands under the car body so the car can not drop if anything goes wrong.

[jaysams80]

It looks as though it might be possible with the nearside wheel arch and wheel removed. I just hope that's the issue. Because it's riding high it knocks quite badly over the slightest pothole or speed bump.

[paul.h]

have you checked the drop links as a cause of the knocking noise ? https://frenchcarforum.co.uk/forum/viewtopic.php?t=38086

 

There is also a topic on the C5 X7 suspension knocking when going over speed bumps but nothing wrong could be found. http://www.citroen-owners-club.co.uk/citroen/topic/21724-c5-hydractive-3-suspension-issue/?hl=%2Bspeed+%2Bbump&do=findComment&comment=79621

 

I have moved this topic in to the C5  Technical subforum since ones outside of a subforum do not show after a couple of days and are then difficult to find.

[jaysams80]

What is the RTA manual Paul?

[paul.h]

It is a French equivalent of a Haynes manual. All in French though but still useful with diagrams and photos. https://www.amazon.co.uk/Rta-B737-Citro%C3%ABn-Depuis-2008/dp/2726873758