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D3 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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#1
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Air Suspension Relay - Preventative Swap
Understand from some D3 owners I've spoken with that swapping out the air suspension relay is good preventative maintenance (to avoid the compressor sticking on and burning out) so I'm keen to do it.
From a quick scour the compressor burning out on relay failure does come up - can someone help with which one to replace and how to do? I've seen 373 and J408 both mentioned (and this thread: http://forum.a8parts.co.uk/showthread.php?t=5085) Thanks in advance! |
#2
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It's a 373 relay that is named J403 - a unique identifier so it can be found in the current flow etc... It is in the front left footwell, position 5. The relay itself is 12v40a with a resistor across the coil to absorb high voltage spikes created by the collapsed magnetic field on disconnection of the coil. Hope that helps.
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Matt 2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN, Last edited by mattylondon; 19th September 2017 at 05:25 PM. |
#3
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please let me know how you get along with this as I might do the same
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A8L 3.0 TDI sport executive 2014. Audi A2 1.4 petrol 2002 SOLD. Audi A8L 4.2TDI Silver 2006 Seat Ibiza 1.4tdi Eco 2008 Silver (£0 Tax)sold NO VCDS rely on Neeldub |
#4
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I would be interested too, is the access to relays easy or is it a take half the dash out job?
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#5
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Thanks Matty.
I found this thread on another forum (no lynching please!): https://www.audiworld.com/forums/a8-...-fuse-2835590/ Not sure I'll get round to this for a couple of weeks but I will take pictures and do a thread - this one's probably a candidate for a sticky. Last edited by jamoca; 20th September 2017 at 10:08 AM. |
#6
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Good find. Very useful photos.
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Matt 2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN, |
#7
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Daft question for ordering - will any genuine Audi 373 relay work or is there a specific one for the air suspension? Do I just say J403? Reason I ask is because I see 373 relays are used for other things, e.g. gas discharge bulbs.
Thanks again |
#8
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Yeah any 373 relay will work. 373 is the relay type, in this case it's a 'make & break relay normal open with coil suppression resistor rated at 12v 40amp'. They are used elsewhere, hence giving it the name J403 to identify it as the air compressor relay.
It does have a VW/Audi part number: 8D0951253A
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Matt 2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN, |
#9
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Quote:
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