L322 Suspension air compressor interchangeability

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
MisterC

MisterC

Member
Posts
27
Location
Sunny Lancashire
My suspension air compressor has given up the ghost. With power on the compressor solenoid just buzzes for a few seconds, then stops. Removing the relay makes no difference.
I’ve ordered a relay as it’s a cheap cost item, and have Googled the compressor part number 6H42-3B484-HE. There seems to be a few ending HD or HF but wondered if they are all interchangeable, and if so, would I keep the same relay or require a compatible one to match the compressor.

Don’t know whether this is an AMK or Hitachi or another manufacturer. Do I have to replace like for like or is there an upgraded version that can be fitted.

Thanks in advance

Car is a 2010MY facelift version.
 
Hey there, not to sure if there is a software update when changing from one pump make to another? As or there relay, if it is a special unit with electronics in it then stick to the correct number. If it is a standard relay then it may be a different amperage.
 
Sounds like you have an Hitachi pump. Dont know what the different numbers mean, if any differences. I rebuilt mine.
Pic of mine attached.

If you change to an AMK then it needs some software flash done, Can be done with an IID Gap. (i believe)

If you buy a new compressor, kits i have seen some have a new relay.

J
 

Attachments

  • 372FDFDD-3BDF-4F7E-A1F2-1FC839287275.jpeg
    372FDFDD-3BDF-4F7E-A1F2-1FC839287275.jpeg
    170.1 KB · Views: 413
marjon said:
Sounds like you have an Hitachi pump. Dont know what the different numbers mean, if any differences. I rebuilt mine.
Pic of mine attached.

If you change to an AMK then it needs some software flash done, Can be done with an IID Gap. (i believe)

If you buy a new compressor, kits i have seen some have a new relay.

J
Click to expand...

Thanks for the picture.......yes just like mine. I’ve seen the repair kits but with mine buzzing it sounds like a sticking solenoid. I’ve given it a loving tap with a hammer but no change.
I take it your rebuild was just the compressor seal kit

Cheers Darren
 
I’m going to wait for the replacement relay I ordered to see if it makes a difference, otherwise I’m going to go for an Hitachi compressor since it would appear to be just plug and play.

Generally what is the average life of a suspension air compressor. Not certain how many my car has had in it’s 10 year lifespan and with now 54k miles
 
MisterC said:
I take it your rebuild was just the compressor seal kit
Click to expand...

Yes just compressor and drier rebuild with a better metal drier cap.

Yours does sound like a different issue. Can you actually run the compressor with a direct feed?
If you are getting a new 1 get it complete with drier too.
Ours lasted 8 years before starting to play up.

J
 
MisterC said:
I’m going to wait for the replacement relay I ordered to see if it makes a difference, otherwise I’m going to go for an Hitachi compressor since it would appear to be just plug and play.

Generally what is the average life of a suspension air compressor. Not certain how many my car has had in it’s 10 year lifespan and with now 54k miles
Click to expand...
I have the earlier model. Compressor was changed around 100k, approx 13/14 years old. From all paper work and looking at the old one, it was original. There's no given average. The more stress and use*, the sooner it will need replacing. Keep on top of the whole system, and it'll last longer :)

* Don't carry short people :D
 
Last edited:
marjon said:
Yes just compressor and drier rebuild with a better metal drier cap.

Yours does sound like a different issue. Can you actually run the compressor with a direct feed?
If you are getting a new 1 get it complete with drier too.
Ours lasted 8 years before starting to play up.

J
Click to expand...

Not done anything with the compressor other than tap the solenoid. Maybe the buzzing sound is the solenoid trying to turn a seized compressor. Don’t know.
I’ve ordered a replacement Hitachi compressor off eBay and will swap out the original one, and change the solenoid.

Was tempted to just swap the solenoid first. Why do you have to change the solenoid too if it’s a direct replacement compressor?
 
MisterC said:
Not done anything with the compressor other than tap the solenoid. Maybe the buzzing sound is the solenoid trying to turn a seized compressor. Don’t know.
I’ve ordered a replacement Hitachi compressor off eBay and will swap out the original one, and change the solenoid.

Was tempted to just swap the solenoid first. Why do you have to change the solenoid too if it’s a direct replacement compressor?
Click to expand...

I dont think you need to replace the relay its just they do put a new 1 in kits i have seen, guess its just a belt and braces thing and after all is not expensive item.

Have you got the drier with the compressor? if not then either get a kit to change out the desiccant & filters, or get a complete drier.

J
 
You must log in or register to reply here.

Similar threads

B
P38A EAS compressor running almost continuously
Replies
7
Views
2K
Mark Piercy
Mark Piercy
F
Disco 2 No power to air compressor.
Replies
0
Views
528
fortsmith
F
2
D2 Td5 Air Suspension
Replies
11
Views
1K
2eZero
2
A
Discovery 3 Air Suspension Red Fault Light
2
Replies
22
Views
3K
sierrafery
sierrafery
Lackingsense
Sport Air suspension/HDC fault
Replies
14
Views
2K
Lackingsense
Lackingsense
Back
Top