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Video: Ride Height Sensor Replacement For Range Rover 2003-2005 (L322)
VIDEO
Watch Gareth, our Land Rover Technician, show you how to replace the front and rear ride height sensors on a Range Rover Full Size 2003-2005 (L322). Applicable Part #s LR020627G (front right) / LR020626G (front left) / LR032106G (rear).
Hi I'm Gareth, tech support here at Atlantic British. Today we're working on an L322. It's actually a 2005 model. We're going to be replacing rear and front height sensors. The reason we're replacing the high sensors on this vehicle is that we were getting corrupt data from the height sensors through to the ride height control module and the car wasn't making any height adjustments. These, it's not uncommon to not have fault codes for this issue as data does get through but it has difficulty adjusting. A lot of the time it's due to the old sensor. This is a front, this is an original one. The the actual pivot point gets seized and tight. I can barely move this one so it won't flex with the sensor and ends up giving wrong information to the right height control module. This is the new replacement here as you can see, totally updated with a rubber bushing. You can see how easy that moves. It comes in a kit form with new retaining screws and a new replacement bracket. This is a 2005 model like I said with the BMW engine in it, which was built between 03 and 05. Part number for this particular model without active headlights is LR020627 for a front, and LR020626 I believe for the left front. The rears that we're going to replace first, this one I don't know if you can see clearly enough, but it's split here. There's a small crack in the body which allows water to ingress into the sensor and give corrupt data back to the ride height control module. And as you can see when I removed it from the other side it just tore apart unfortunately, so yeah definitely time to replace. This side was also starting to crack even though the screw came out. The new one for the left and right rear uses the same part number LR032106 genuine part that we sell. And this is the sensor itself. Again all rubber bushed, nicely. A little bit more updated. Not as big as cumbersome. And this also comes with a little tiny repair kit of new retaining screws. So we're gonna start here on the right rear of the vehicle for replacement to the rear sensor. It's a little bit of a tighter fit.It's located all the way back here against the rear subframe. It bolts the lower arm down on the lower control arm. There's a 13 mil headed bolt and nut that hold it in place here. There is one electrical connector right here there has to be cleaned. I generally spray with a bit of WD-40 or PB Blaster just to sort of loosen any dirt up or anything and I normally blow it with compressed air to loosen up any dirt that might have been caught in there. And then once the connectors off, we undo the two retaining screws, one here and one down at the back underneath, in the corner here. However I don't hold out much for the screws coming out that easily because they've been in there a long time and it's all heavily corroded. So I'll start on the nut here and bolt, then the electrical connector and then I'll work from underneath the vehicle and remove the two screws. Okay so here is the right rear height sensor removed. Lucky this time it came apart quite easily. Some, a lot of the time the hardware, these two screws that hold the sensor to the bracket rot out and you end up having to get vice grips out and start moving it bit by bit. But this one came out quite easily. This one is split down the side of the bracket and on this side you can see the split here, which was allowing water to get into the sensor and give corrupt information to the right height control module. So we're going to be putting the new, new one on momentarily and mounting it like so into the vehicle. 2 new screws, connector, with a dielectric grease in the connector to help waterproof it, stop any corrosion, and then we're going to move on to the front sensor. So the sensor is installed. Just a quick check to make sure that the arm moves nice and freely and doesn't obstruct the screws that we put in to hold it in place. And that's good. The arm goes back through the bracket hole somewhere here. There we'll put the original nut back on. There's nothing wrong with it. We'll hold it with a small 10 millimeter wrench down at the bottom. We'll zip it up make it nice and tight. We'll put the electrical connector back on with a little dab of dielectric grease and we're all set to move on to the front. So the new sensors all installed. It's solidly mounted to the lower control arm here. It's free and clear of the containing screws. The clips back on, dielectric grease on the inside of it. It's clipped on in place. That's all done we're gonna move on to the front section okay so here we are at the right front. This is the height sensor we're going to be replacing. I can already see at the top of the sensor it's split open. Plus I totally suspect this heim joint to be seized. I can't even wiggle it sideways, so I'm already assuming that it's bad and seized up. Gonna start off removing the electrical connector here. We squeeze the sides, the tabs, push it down, remove the connector. I'm going to disconnect the lower heim joint here at the lower control arm, and then we're gonna actually remove the whole bracket with the sensor from here and here. Obviously going to have to cut the cable tie that holds the wiring on for it right there and then we're gonna put a new bracket on. It'll go mount exactly the same place as the old one was but the new one has the plastic arms with the rubber bushings so they don't corrode and seize up. So this right front sensor, as I suspected with the left front, is seized solid. The arm moves at the sensor but won't pivot here at the arm and I'm pushing, there, I mean I'm forcing that quite badly and that would not it would, would not give good correct information to the right height control module. It would be corrupted. It's just totally rotted out, seized and needs replacing. Okay so the height sensor is off the car and I'm forcing it to move obviously, that would not work properly on the car. I mean it's freeing up now because I've moved it a couple of times but it's still way too tight for good correct data input to the right height control module. So with this we're going to be replacing, with the sensor, which comes with the new plastic arm with the rubber bushings, it's gonna get a new bracket, new screws and hardware that hold it all together and it has definitely been getting water in it off of the crack that is right at the top there where the hardware goes through. So the nice thing about the new sensors they come with the new bracket. We get to install the bracket first to the height sensor before we install it onto the car. So what I'm going to do is orient this in the right direction and of course we have the old one here to make sure I get it right. And we can screw it on using the two new screws. Screw the bracket on and then just use the old screws that hold the bracket to the subframe of the vehicle. Goes that way, like that. And for any beginners out there who want to try this it's always a good idea to take a photograph of it with your digital phone, cellular phone. Just pinched up a little bit. Don't have to go swinging on them they're small screws that's going into a small plastic housing. You don't want to strip the plastic housing out. You'll feel it bottomed out when it's tight. Check the other side. And there we go. Same as the old one. There, there, ready to install. I'm gonna get a cable tie for this so we can hold it on there nice and firmly. It's not flailing around. I'll go grab one. Okay so now we have the new right front high sensor installed. The clip, the wiring harness clip for the height sensor is on nice and firmly. The link rod is attached securely, as is the new bracket. I just zip-tied the wiring harness on nice and firmly just to stop it from blowing around and any possible catching of anything. We can put the wheel back on and we could lower the vehicle. We'll probably do a test first to see if we need to calibrate the suspension. You don't always have to calibrate the suspension, it depends on if there are any faults arise due to height sensor replacement. A lot of the time, or, most of the time all the height information is stored in the ride height control module. The sensor just tells the height control module what it's seeing. So not always calibration is needed but we won't see, know until we actually test the system. If we do then yeah we'll do a calibration procedure. If not luckily, hopefully, we have just replaced the sensors and the system will come back online and work properly. Okay so here we have the car off the left now, wheels back on. I've actually tested the vehicle a couple of times since we had the car on the ground. The air suspension is working back in operation normally now. There is no need to recalibrate every time you replace height sensors. The information is always stored in the right height control module on most of the Land Rover models. We did do all 4 sensors on this vehicle. I observed it with the diagnostic tool we had. The readings were with, well within parameters of one another. I did not calibrate it. I've tested the system in access mode normal ride height and in extended height mode and it is working perfectly fine. The vehicle drives excellent. I've no concerns over having any issues over to wanting to recalibrate. I've left it well alone. It doesn't need it. I'd be happy if this car came back to me from any repair facility in this condition.
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