maxmax
Member Since: 02 Mar 2010
Location: Surrey
Posts: 181
  
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| Replace rear parking sensors |
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The middle two parking sensors can be got at without a complete bumper removal, but it is so simple and quick to remove the whole bumper cover, for the sake of not skinning your knuckles I recomend it. This post covers it off:
http://www.disco3.co.uk/forum/topic47084.h...ear+bumper
Follow the instructions above for bumper removal, except:
1. As the wiring loom for the sensors joins on the left you can save a chunk of time and needing three hands by leaving the bumper connected at the rear left wheel arch (the hidden behind the mud flap / wheel surround trim) connector only
2. The rear light clusters come off by undoing the two screws visible when standing facing them outside the car, followed by a gentle tug. Surprisingly easy. Disconnect plugs and stash somewhere safe.
3. It is not necessary to remove the rear wheel surround trims entirely. I removed the rear two plastic plug clips inside the wheel arch and pulled the rest of the outer clips loose. All the outer clips are just poppers, just prise away from your paint work without damaging and pull gently. A little peeking in then reveals the "hidden" bumper plastic plug which can be prised out with a screw driver (and a whole load of mud in my case).
4. In case it is not clear, the plugs running along the top of the bumper are the same as the hidden plug as above. Don't forget to remove the outer plug after pulling out the stopper.
5. The parking sensors are then easily accessible once the bumper cover is pulled back. To pull the bumper back ,first pull outwards behind the right hand wheel arch to release the grip of the clips. Each parking sensor has two clips holding it to the bumper and will need either a push through from the outside or a pull from the inside. Third hand recommended. NB - looking from the outside, only the inner circle moves. The mounts stay with the bumper.
job time - 15 mins to remove, 10 mins to replace the sensors and 10 mins to refit working quickly.
sensors supplied by The Large One, thanks. D3 2.7 TDv6 HSE, 2005 in silver.
2009 nav disc (thanks Wiggs)
2007 software upgrade (thanks Wiggs and Geoff) with 3 flash indicators, follow me home reverse lights, fog with side lights & canadian driving lights
D4 bluetooth module (thanks Wiggs again)
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 19th Apr 2010 5:50 pm |
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Phil W
Member Since: 26 Jan 2010
Location: Chester
Posts: 20
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| Re: Replace rear parking sensors |
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Unnecessary quote removed
MaxMax
Have a problem with my sensors and would like to try replacing them myself. See highlighted quote in your post. Do you mean leave right side still bumper cover or bumper connected? If wiring connector on left side how can you disconnect if leave left side of bumper cover still connected? Or are you saying you can remove the sensors but leave the loom connected? 
Ta
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| 28th Jun 2010 7:35 pm |
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maxmax
Member Since: 02 Mar 2010
Location: Surrey
Posts: 181
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Hi Phil,
If you are only replacing sensors and not the loom, leaving the left side of te bumper cover connected at the wheel arch leaves more than enough play in the bumper cover to replace each sensor and saves the need to disconnect the loom. it also means you don't need to come up with something to balance the bumper on to avoid stretching the cabling for the loom etc.
Max. D3 2.7 TDv6 HSE, 2005 in silver.
2009 nav disc (thanks Wiggs)
2007 software upgrade (thanks Wiggs and Geoff) with 3 flash indicators, follow me home reverse lights, fog with side lights & canadian driving lights
D4 bluetooth module (thanks Wiggs again)
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| 29th Jun 2010 9:56 am |
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Phil W
Member Since: 26 Jan 2010
Location: Chester
Posts: 20
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Cheers max.
Makes sense now.
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| 29th Jun 2010 7:09 pm |
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Andrew Hebron
Member Since: 16 Jan 2009
Location: Teddington
Posts: 501
 
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| Re: Replace rear parking sensors |
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maxmax wrote:job time - 15 mins to remove, 10 mins to replace the sensors and 10 mins to refit working quickly.
Guy Salmon want £200 labour for that job! I didn't fall for it... Andrew
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| 29th Jun 2010 11:28 pm |
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Phil W
Member Since: 26 Jan 2010
Location: Chester
Posts: 20
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Mine have gone again!
Anyone know how Ican determine if the sensors / loom are faulty or if its something else.
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| 2nd Jul 2010 12:10 pm |
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cja1579
Member Since: 30 Nov 2009
Location: Kendal, Cumbria
Posts: 96
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I have a sensor failed (drivers side inner according to Land Rover), disco under warranty so I am getting it done next week. It would be (if I was paying); £154 and they say it will take 1.5 hours.
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| 21st Jul 2010 3:22 pm |
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theoriginalsss
Member Since: 11 Nov 2009
Location: Toronto, ON
Posts: 1
  
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Does anyone know if they need to be calibrated or programmed at all by a LR shop after installation? Thanks
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| 9th Mar 2014 4:10 pm |
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MarsKy
Member Since: 23 Dec 2011
Location: Lanarkshire
Posts: 847
  
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Had mine done under warranty a few weeks back.
Land Rover Assistance says it's more than a straight swap as they also need to be calibrated for distance.
But others on the forum seem to be just switching them without any calibration.
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| 9th Mar 2014 4:20 pm |
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J@mes
Member Since: 10 Nov 2008
Location: Bomber County
Posts: 4547
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I've replaced a few new and never calibrated them or anything like that. 2014 D4 XS
2005 D3 SE - Gone
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| 9th Mar 2014 5:36 pm |
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disco305
Member Since: 01 Jan 2013
Location: brussels
Posts: 137
 
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changed the loom and one sensors a year ago.
The loom is not expensive, the sensors cost a little bit...
What I want to say is this, after refiting every thing back, the sensors would not work ! 
So I found on this site a calibration process that made them work .
I wil trie to find this process and come back ( easy to do yourself ).
Tony
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| 11th May 2014 3:56 pm |
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disco305
Member Since: 01 Jan 2013
Location: brussels
Posts: 137
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OK, can't find it. (Maybe somebody else will 
As far as I remember this is the process.
- Find a free piece of road.
- stop the car and turn off ignition.( gear in P )
- start engine
- put the car in low range ( makes it easier, less speed and distance )
- then drive the car, allowing all the gears to got through ( up to 5 )
- stop
- put the car in reverse
- drive 100 or so meters in reverse.
- stop
- switch every thing off
- take the key out
- wait a couple of minutes.
- restart the car
- DONE
I had to do this 2 -3 times to get the PDC to work.
About 6 months later, the pdc would not work again, so before taking it apart I tried the calibration
process again, and it cured the pdc.
If I remember one of the issues is that, if you go back and forward several times , the ECU can loose
the calibration .
Hope this will help
Tony
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| 11th May 2014 4:28 pm |
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Cyberprog
Member Since: 23 Dec 2010
Location: Sunny Brizzol
Posts: 47
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Sorry for the thread resurrection but these are a right swine to change.
My right inner had gone, and I couldn't get the mud flap screws out (rusted out) so eventually popped as much as I could off in the centre and winched the plastic bumper out the way with my workshop hoist on a snatch block off the bench!Only then was I able to access the Censored .
Nice to have parking sensors again tho! Alex Threlfall (Nanocom Evolution Owner)
Disco TD5 Auto - TD5 Alived! with mental mods
Disco 3 HSE Auto - Pending lots of mods! + Nanocom Evolution
If you can't be a good example, at least be a horrible warning.
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| 31st Jul 2016 9:52 pm |
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WTO
Member Since: 13 Dec 2008
Location: Noth Yokshire
Posts: 16
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| Rear Parking sensor replacement with Foxwell NT510 diagnosis |
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Just completed the replacment of a rear sensor on a 2008.5 model and the following feedback may help
others
1) Diagnosis
This proved tricky since the fault was intermittent and all the methods of checking listed herein were inconclusive. I could reverse out of the garage and down the drive and during that time I could have it working perfectly to begin with, then the fault alarm would go and it would sometimes reset itself to work perfectly before I finished reversing. The problem was however getting worse.
So I invested in a Foxwell NT510 and it took about 10 minutes to complete a check which simply told me that the rear offside outer sensor was faulty. So I purchased Chinese version via Ebay and it arrived within 3 days. I still wasn't convinced the answer was right having read some many entries on here where the wiring harness was condemned.
2) Mudflaps
This was the major time element as reported by others but with plenty of WD40 and various tools I did eventually remove all the screws. Why on earth LR don't fit the bolt head type screws thoughout as it would make life so much easier than struggling with crossheads - mine had 3 of each type !!! The other disappoinment was that the inner metal support within the mudflaps had totally corroded away to dust.
3) Bumper fixings
These came out surprisingly easily once I had loacted them all. The four across the back below the tailgate came out using two screwdrivers to lever out the centre pin whilst a second person supported the tailgate.
4) Wiring Harness
Upon removing the bumper I was surprised to find that there was an internal hard foam liner which carried the wiring harness requiring three plastic screws to be removed to remove it and gain access to the harness. I carefully cleaned the cable from one end to the other but it appeared to be in surprisingly good condition for an 8 year old vehicle. There were no signs of damage and concluded that the foam liner had done a good job.
5) Rear Sensor replacement
Having eliminated any obvious defects with the harness I then decided to trust in the Foxwell and fitted a new Chinese sensor in the nominated position. This was no problem and the sensor looks identical apart to the orginal from the colour of the plastic at the connection end. At this point I cleared all faults on the Foxwell and set it off doing another check on the parking sensor circuit and it came back with a no defects result. I then reassembled the kit again and tested the car for real. The system works perfectly without any recailbration - giving the same warning at the same distance as far as I can tell.
So I have spent about £ 145 and an hour or two of my time and still have the Foxwell available for future use.
Hope this is of interest to others
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| 11th Sep 2016 7:03 pm |
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Richie092
Member Since: 11 Jan 2016
Location: Maidstone
Posts: 83
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Good write up. Can you tell me if the outer sensors are identical to the inner two please?
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| 26th Jan 2017 7:03 pm |
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