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I changed mine today... I bought one one aliexpress brand new for $255.00 they shipped it dhl on the 7th from china and to my amazement it showed up today on the 8th I installed it in less than 45 minutes the top cover you just pull out... it will come out other than that this new one works great and should hopefully last longer than the oem ones
 

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Thanks for posting this. I am certainly tempted. I have been running my LR3 2006 with the suspension fault about 6 months or so. I know i need to change it at one point. One question is the part you posted seems to be missing a couple pieces compared to the original one sold on ebay (Genuine DISCOVERY 3 & Range Rover Sport Air Suspension Compressor (LR045251) | eBay). is that right? or it is just the pictures.
 

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Did you have to reprogram the ecu for the new air comp?
You should only *need* to do that if you're replacing the Hitachi with the AMK. There was an update for the Hitachi for later model years to change the running to supposedly extend the life but it isn't needed as with the AMK swap.
 

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Just replaced mine. Couldnt have been easier. Best advice in one post was to remove the whole bracket. Total job 30 min. Works great. Thanks for all the advice.
Quick question, did you replace it with the upgrade compressor or the same one? And how do you remove the lines going to the back of the old compressor? Thank you
 

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Even though I have a 2006 RR Sport, I read most of this thread with great interest! Thanks to all that contributed!! :clap:
How much different is this job on the Sport? I've had my compressor changed twice in two years and based on my experience with this vehicle, I believe my charming third time is not far away! :eek:
 

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Question

No, it is not necessary recalibrate suspension.

Suspension should be recalibrated ONLY when a sensor height or the suspension ECU is removed.
How do you remove the big lines in the back of the compressor? Every where just says "just remove" do you unscrew one? And the what about the other one? Also I bought the "upgraded land rover compressor" it's different has anybody replace their old compressor for the new style?
Thanks
 

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Here is a good thread for how to replace the compressor:
DISCO3.CO.UK - View topic - How To - Air Suspension Compressor replacement

And here is a repair thread (still plenty of good info):
DISCO3.CO.UK - View topic - Suspension Compressor / Suspension error

Another repair thread:
DISCO3.CO.UK - View topic - How to 'repair' air compressor and fit new air dyer

I don't know if these links will come through because I'm not quite sure what the rules on this forum are, but if they don't I will try a different method...
 

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How do you remove the big lines in the back of the compressor? Every where just says "just remove" do you unscrew one? And the what about the other one? Also I bought the "upgraded land rover compressor" it's different has anybody replace their old compressor for the new style?
Thanks
Check out the links BBYER has posted - the lines don't unscrew they are usually push in, hold collet, pull out. May need some WD40 prep spray a few hours ahead of time.

If you mean by "improved compressor" the AMK unit, then yes, I have replaced my '07 LR3 Hitachi unit with that. A software update is needed which I did with my Faultmate but if you are DIY'ing the hardware you can probably get your LR dealer or an indie shop to do the software.
 

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new air suspension compressor kit lr045251

Does anyone have a 'how to' for replacing the compressor with this new kit? And is there any problems that will arise if I don't get the software update after the replacement is installed? I have a 2006 LR3 and currently its a low rider.
 

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Does anyone have a 'how to' for replacing the compressor with this new kit? And is there any problems that will arise if I don't get the software update after the replacement is installed? I have a 2006 LR3 and currently its a low rider.
See my link in the post above yours!

You can run with the old software for the Hitachi for a while but I have heard that you can find the rear raised and the front lowered with the wrong software. If you like the dragster look I suppose that's fine but for ten minutes of update it's a shame. Your LR dealer can do it if you do the wrenching or find an independent LR shop.

Of course you may want to confirm it IS the compressor and not an air leak in a valve block or on the compressor/dryer assembly. Reading the fault codes should confirm.
 

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Sorry to just jump on this thread but i have a problem with my discovery 3.the orange light came on (the picture of the car with arrows above ) and the message suspension fault come on the screen, obviosly i pulled the lower button which made the motor drop on its ass and its been there ever since and wont raise again.now the message normal hieght only has popped up...it turns out i have an AMK compressor and im lead to believe i have to replace this as it cant be serviced,but i was wondering if it is the compressor and if anyone could shead some light to help me

thank you

tony
 

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Tony,

There are many many reasons you can get this error. Just search this forum and others and you will get some idea of what I'm talking about. I don't know what year your D3 is or how old the compressor is, but there are a number of things that can go wrong that do not require full compressor replacement.

Unfortunately, it's kind of a crapshoot unless you can read the fault codes and come back and tell us what the errors are. If you have already taken the D3 to a garage, they should be able to pull the codes and tell you exactly what they are. We might be able to help you better with those.

If you do not have a fault code reader or have not taken it to a garage, then there are things you can try on your own, but again, no guarantees than any of this will work. One common issue seems to be the relay going out. There is an updated relay that was supplied with the AMK compressor. I don't know how much it costs, but I have read a few posts where people have solved their problems by replacing this relay.

Another common issue if your compressor is 3 years old or older is that the desiccant tends to clump up and then begins to degrade. The makes it very difficult for the compressor to fill the reservoir tank as it must work much harder than it's supposed to. If the desiccant is in really bad shape, it may degrade to the point where it is more or less dust. This dust can permeate the air lines and gunk up the valve blocks among other things. You can remove the compressor and have a look at the state of the desiccant. If it's in really bad shape, consider replacing just the dryer assembly to the tune of $125 USD in parts... work you can do yourself.

Beyond this, there are compressor "refresh kits", though I'm not sure if they make them only for the Hitachi compressor or both the Hitachi and AMK compressors.

Hope this helps a little bit. Good luck!!
 

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Thanks for that ,ive took the motor to a garage who are at the moment trying to fix it ,ive only had it 6 weeks and the garage i bought it off are saying i only got a 1 month warranty so i might have to foot the bill myself which seems unfair but there you go,and the garage told me it will take 7 hours to exchange the pump which i think is rubbish as ive changed engines in less,so they are going to phone today with the problem and ile let you know what they say (i was just starting to enjoy the disco too ,this has really kicked my confidence in)
 

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No offense, but you need to find a new garage then. Changing the entire compressor probably takes about 30 mins. Maybe 60 mins if you've never done it before and are slow and taking your time. There are many how-to's on this board and others.

Forgot to tell you... one other common problem is that a hairline crack forms in the dryer between the two hose connections on the side opposite the compressor. This can also cause errors.

A less common, but still possible problem is an issue with one of the ride height sensors.
 

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Yep, took me only a couple of hours at a snails pace to replace the Hitachi with the AMK on my '07. I was just being super cautious to read the instructions....so 7 hours must include their technicians breakfast, lunch and dinner...are they a LR franchise dealer ? They may not have the training and/or tools...or know how to read these news groups...
 

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well the garage who do the work for the dealer i bought it off have said its the compressor and will take 7 hours to do but they cant put their finger on what exactly the problem is .so ive told them to take it to les potts for a second opinion.i called les yesterday who told me its not the compressor but there is a problem which they will fix today he also said there is a load of fault codes which have been turned off by the fore mentioned garage ,when i do get it back im goin to tell the dealer to watch the bloke doing work for him as hes robbing them blind
 
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