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Discussion Starter #1 (Edited)
How To: LR3 - Replacing the suspension compressor

Since I didn't find this information on the site, I decided to join and create a how to replace the suspension compressor thread. I hope this helps you all if needed in the future. I purchased my vehicle brand new on December 2005, when they first became available. I have not had any problems with it until now, off course, the warranty has expired :)

After a few days without a soft suspension on the LR3, I decided to bite the bullet and buy a new compressor and install it myself. Total cost $530 (OEM compressor) and about 1.5 hours of my time.

Land Rover wanted $900 (retail) for the compressor and about 2 hours of labor @ $125 an hour + diagnostics, tax, shop supplies, etc..etc....... Bottom line, the job would have cost me about $1300 - $1400.

Tools needed:



Part # LR015303



Here is how it’s done.

The compressor is located in front of the rear drivers side tire next to the outer portion of the frame.



The first thing to do is to disconnect the battery, so that all electronic components don't kick in do to the auto leveling system.




Next, you will need to remove 3 screws that hold the compressor and remove the 3 air lines that are connected to the compressor. You will also need to remove two plugs that power up the compressor and transmit the signal to the computer.

*** The trick to removing the air lines is to hold the base plate flushed against the compressor while you pull on the air line.






Once that portion has been done, you will need to remove the 3 bolts that hold the compressor in place (2 on the bottom and one on top).







Now you can remove the old compressor and install the new one in the reversed order.

New compressor installed.



No errors on the dash....



Note the icon showing the suspension at full height



I hope this helps.....
 

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I'm super stoked that you made this write up. Thanks for you valuable contribution! So you didn't need to have the fault cleared? Did you have a dash indicated fault to begin with?
 

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I'm super stoked that you made this write up. Thanks for you valuable contribution! So you didn't need to have the fault cleared? Did you have a dash indicated fault to begin with?
There was no need to get the fault cleared.
Yes, I had a suspension fault error on my dash prior to this fix.

If you have any other questions peratining to this fix, please feel free to PM or post here. :beer:
 

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thank you for sharing your knowledge. Now, a question that is compressor related.

Does anyone know if one can get a larger ompressor to serve the suspension system, but also is able to be used to inflate tires? I am curious because o\f the desire to drive on beaches, which requires deflating tires to improve traction, and don't want to drive on underinflated tires on highway to get to a gas station (which i did when I rented 4WD to hit the beach).

I assume asking the stock compressor to iflate tires is asking too much, correct?

Does anyone have any suggestions, aside from getting a cheap 12V compressor to carry in this situations on how to have built in capacity to inflate tires?

Thanks!
 

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Discussion Starter #5
I would recommend purchasing a powertank and keeping it in your vehicle. I keep this in my buggy 24 / 7. I personally like it because there is no electricity needed and it’s portable.





thank you for sharing your knowledge. Now, a question that is compressor related.

Does anyone know if one can get a larger ompressor to serve the suspension system, but also is able to be used to inflate tires? I am curious because o\f the desire to drive on beaches, which requires deflating tires to improve traction, and don't want to drive on underinflated tires on highway to get to a gas station (which i did when I rented 4WD to hit the beach).

I assume asking the stock compressor to iflate tires is asking too much, correct?

Does anyone have any suggestions, aside from getting a cheap 12V compressor to carry in this situations on how to have built in capacity to inflate tires?

Thanks!
 

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Thanks so much for this, Im going to attempt it soon.
Can you tell me how the air lines attach? I had the cover off the other day, but couldnt work out how they secure and remain air tight.
Cheers
 

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I'm replacing mine as soon as the replacement I bought on Ebay shows up. I am starting to blow compressor fuses so it looks like my current one is done. I will try rebuilding it to use as a spare.
 

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Good job Pacifier!

I have some questions about the diagnostic of compressor fault.

1. How you concluded that it was actually the compressor and not a leak somewhere else or clogging of inlet filter or dryer or a valve?;

2. I know that the vast majority of issues is really the compressor fault (a fault in compressor internal valve in early models), but you followed a checklist of single thing before?;

3. The new compressor comes with the dryer?;

4. The symptoms suddenly appeared or not?

Thank you in advance. I have at this moment a amber light, a fault code C1A20 "pressure increases too slowly while filling reservoir". Exactly as described in LR Bulletim at http://www.rrsport.co.uk/gallery/albums/userpics/10111/LS204-004Airsuspension.pdf

The symptom in my Disco appeared suddenly.

Regards.
 

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Replaced the compressor last night. It was -15 outside but I was able to keep partially warm in the garage at a toasty 5 degrees C. The job went ok:

disconnect battery: easy
remove lower comp. cover: easy
disconnect air lines/e power: easy
remove three hex bolts (1 under and 2 above): not much tool room, swearing

I had trouble at this point removing the actual compressor. My upper shield seemed to be in the way. I couldn't seem to get the damn shield out of the way. The write up doesn't seem to deal with the shield issue. How to remove?

Again installing the hardest part was getting clearence due to the upper shield. Outside of this PIA the job went well. The slush and dried road salt didn't make for a pleasant environment.


The compressor was replaced because the odd intermittant fault had escalated to blowing 60amp compressor fuses. The compressor I replaced lookks to be either a used and/or rebuilt. This would suggest that at 125k kms my LR3 is now on it's third compressor....
 

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Discussion Starter #12
I had the cover off the other day, but couldnt work out how they secure and remain air tight.
Cheers
It's sort of spring loaded and pressure sealed. Basically, when you pull on the line, the spring gets tighter and you wont be able to remove the line. The way to remove the line is to hold the retainer fitting flushed against the pump and pull the the line. ;)
 

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I have some questions about the diagnostic of compressor fault.

1. How you concluded that it was actually the compressor and not a leak somewhere else or clogging of inlet filter or dryer or a valve?;

It actually started out as a leak and I just ignored the problem, thus resulting on a burned compressor from being over worked. :clap:

2. I know that the vast majority of issues is really the compressor fault (a fault in compressor internal valve in early models), but you followed a checklist of single thing before?;

I knew it was the compressor because I lost all the air on my air shocks and the compressor just stopped working completely.

3. The new compressor comes with the dryer?;

Everything that I needed was included with the compressor I ordered (OEM).

4. The symptoms suddenly appeared or not?

Yes! I got faulty errors a few times before and just restarted my vehicle. I did this for about two months before the compressor finally burned out.

I hope this answers your questions.
 

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Pacifier,

Thank you so much for answers.

I ordered one OEM compressor and now await your arrival. Me and my amber light...:bawling:

For statistics my Disco 3 is a S TDV6 2006MY with 66Kkm on clock.
 

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Compressor replacement has solved my yellow light error messages. I also noticed that the vehicle farts more after shutdown. With brand new compressors available on Ebay for around $500 I wouldn't mess around trying to fix parts on the old one. The process is really not that hard. If I had to do it again (in another 60k kms?) it would likely only take 30 minutes.
 

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Pacifier,
Great contribution, thank you. I am about to become a Discovery owner after giving up on BMW's rear traction here in Scotland, useless!!.
I keep hearing reliability issues on the Discoveries so what better way to get to know more from the experts:
- What should I watch for when looking at used Discos? I am looking at a 2008-2009 model, probably around 30,000 miles on the clock
- What is the FBH? All the units come with this device?
- Do all the Discoveries come with air suspension?, therefore the need to deal with air compressors, etc?

This is for now.

Thanks!!
 

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Pacifier, great info. Mt '05 LR3 comp just starting to go out. dealer wants 1,100 U.S. :bawling: so I have 2 questions.

1) Dealer said after install suspension needs calibrating. Is this true?:dunno: If so, how did you do yours?



2)Where did you get your new OEM compressor from?


Thanks a ton. Can't wait to get started...
 

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I have some questions about the diagnostic of compressor fault.

1. How you concluded that it was actually the compressor and not a leak somewhere else or clogging of inlet filter or dryer or a valve?;

It actually started out as a leak and I just ignored the problem, thus resulting on a burned compressor from being over worked. :clap:

Good job, it's nice and clear. But one question, where is the leak at the first place, if you just replace a new compressor without fixing the leaking area, will the new compressor over worked and burned out again, just like the old one did? Thank you.
 

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Pacifier, great info. Mt '05 LR3 comp just starting to go out. dealer wants 1,100 U.S. :bawling: so I have 2 questions.

1) Dealer said after install suspension needs calibrating. Is this true?:dunno: If so, how did you do yours?



2)Where did you get your new OEM compressor from?


Thanks a ton. Can't wait to get started...
1) I didn't calibrate mine. It was fine afterwards. Me thinks that is a wallet draining scam.

2) Ebay. OEM compressor, new for about $500 US. Local dealer here in Alberta, Canada was selling refurbished units for $900. I replaced a refurbished unit so I don't trust them . My preference would be new.
 

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1) Dealer said after install suspension needs calibrating. Is this true?:dunno: If so, how did you do yours?
No, it is not necessary recalibrate suspension.

Suspension should be recalibrated ONLY when a sensor height or the suspension ECU is removed.
 
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