No longer available!

I know there are a lot of posts for this problem but I started new topic for the way I solved it.

Here's the way I repaired couple compressors.

If you have "Suspension fault" "Normal height only", yellow suspension light on the instrument cluster and air suspension control switch inoperative, LED's off on the button arrows.

The fault code is

C1A20 64
C1A20-64
C1A2064

Here's what service manual says

Compressor fault
Reservoir pipe air leak
Reservoir air leak
Gallery pipe air leak
Intake filter blocked/restricted
Intake pipe blocked/restricted
Air suspension intake silencer blocked/restricted
Corner valve stuck open
Pressure sensor fault

But the actual problem is the compressor dryer cover crack leak. There're two holes in it for 5mm exhaust pipe and 6mm line to reservoir-gallery. The gap between holes has a micro crack which leaks the air.

To find out the the crack exist you need soap water spray the area there and turn one the engine to start the air compressor automatically pump the air. At first it might look like leaking pipe connectors but the problem is crack.

I have manufaturred couple of these dryer covers in stainless steel and couple in aluminum. Used fast release connectors for pipes.

No need of new compressor, no need of new dryers which is no longer available from Land Rover
RQQ500013, RQQ500014, RQQ500015, RQQ500016, RQQ500020, VUB504700.

Couple of these I've done without removing compressor from the car just removed bottom plastic compressor cover.

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Quote:

This is my first cap really hard and solid which looks like the part from a submarine but works great without any problem

How to Do It Yourself DIY

Tools required

-ratchet
-extension
-10mm socket
-T30 socket
-utility knife
-14mm open end wrech
-swivel extension


First of all locate the compressor box under rear left side door, it's a black plastic box. Remove lower compressor box cover, unscrew 3x 10mm bolts and unlcip plastic fasteners.

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Cover removed

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Locate blue and orange connections, crack should be there, use sprayer with soapy water to detect leak and find a crack. Start the engine to run the compressor, if compressor doesn't start lower and raise the vehicle and compressor will run.

When crack detected turn off the engine, disconnect battery negative, disconnect two electrical connections by the compressor to have more room. Disconnect pipes from blue and orange holes by pushing blue, orange rings and pulling the pipes out.

Use T30 to unscrew six caps screws, I recommend to start from the top. Remove the cover, hold it tight, there's a spring behind the cap.

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Cap removed

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Replace red o-ring, put the spring back in place, put new cap in. Use small amount of soap or other lubricant on red o-ring for easier installation.

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New cap in place

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Put quick release joints in finger tight. Use 14mm open end wrench to tight but don't use too much force. Push 5mm pipe to side connection which was in orange before. Use utility knife to shorten 6mm pipe 3cm which was in blue connection before and push in center connection. The quick release joints require to push pipes to the very end and the pull back.

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Connect electric connections, battery negative, run compressor and use soapy water to make sure there's no leak. Put lower cover back in place and you're done

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Very clever. Looks like a well engineered solution and should last longer than OEM. Gone - 2008 Stornoway Grey RRS 2.7 TDV6
Gone - 2009 Buckingham Blue RRS 2.7 TDV6
Gone - 2010 Alaska White RRS 5.0 V8 Aspirated
Gone - 2017 Chawton White RRS 5.0 V8 Supercharged
Current - 2010 Java Black RRS 5.0 V8 Aspirated
Current- 2024 RRS P400 SE Dynamic

Thanks

I've replaced a lot of these caps and none of them failed so it comes with lifetime warranty

Excellent write up and very nice bit of kit  2006 4.2 Supercharged Buckingham blue
2003 BMW X5 4.6is Estoril blue
2006 Yamaha FZ6

I had already overhauled the compressor but still the dreaded light came up. I then read your solution and checked the cap with soapy water and low and behold there is a fine crack between the two outlet threaded holes!
I have emailed you for a price and delivery.

Well done on finding it and then fabricating a solution!

Received the new cap, cost £35 and came in 5 days. Its machined tough plastic, fitted this afternoon, took about 45 minutes without removing the compressor, did it in place.
Test drove and problem solved no more dreaded warning light!!!

Thanks Ignas.

Hi do you have any more of these it won't let me pm as new member

Hi, if you make a total 3 replies you will be able to pm him.

Been in touch with Ignas he's putting one in the post for £35, & printed off his description on how to to the job.Showed it to my mechanic who said it was a clever bit of kit.Hope it get's rid of the annoying light on the dash, will update when i've had the job done.

Suspension failure light came on today on 2006 tdv6 70,000 only had it a week but once turned off and on agin it's been fine !! Is this Likely to be the fault ? , sorry to be vague but only just happened and I've only just got rid of a BMW X5 that was rippled with faults witch put me through 8 weeks of hell !

Hi Miller mine was like that at the start but gradually got worse, so I came on this brilliant forum site & found the remedy. I got in touch with a Guy called Ignas who is on here sent him the payment through paypal & he sent me the part's job done

Cheers wings It has not been back on all weekend coverd about 100 miles but most short journeys , think I may just order the part and do it one less thing to worry about

well got the car back on wednesday after the mechanic fitted the new parts and hey presto there was a hair line crack in the compressor cover. so on went the new one good news no more orange light on the dash. Thanks Ignas for a great bit of kit well worth the £35 and coming all the way from Lithuania.

Hi all and especially gruodiz. I had the light and warning for a couple of weeks. Now suspension has dropped onto the stoppers and won't raise. Compressor is trying but car won't raise... Question - Is this indicative of the hairline crack scenario?? Help much appreciated

Great wright up and looks like a nice bit of kit for an upgrade.
Don't need one yet but if I do I know where to come.