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Member Since: 30 Jun 2020
Location: Derbyshire
Posts: 451

United Kingdom 
Dunlop air bags - knocking

Hi All,

Can anyone help me, I had a pair of Dunlop air struts fitted earlier in the year and they appear to be the source of an irritating knocking sound. The airbags work and don’t leak, but are making a low speed knocking noise.

Does anyone know the root cause for the Dunlop ones? Is there a fix? Or is the only solution to source Delphi ones?

Many thanks,

David L322 TD6 2003
Epsom Green- the dogs car which has worked it’s way into being the family car 😮

Post #678523 22nd Nov 2023 6:37pm
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vs322



Member Since: 08 Apr 2020
Location: Athens
Posts: 584

Greece 2004 Range Rover HSE 4.4 V8 Java Black

Are you sure it's not the drop links? They are rather inexpensive and easy to replace. Also, I think there should be a warranty on the struts should they turn out to be the culprit.

Post #679236 1st Dec 2023 4:52pm
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Merchy



Member Since: 14 Feb 2021
Location: North Wales
Posts: 1181

United Kingdom 2006 Range Rover Vogue Td6 Zermatt Silver

Same thoughts as in the above post, plus it may be that whoever fitted the new parts made a mistake when working on the car ? If both are causing the knocking sound then I rather doubt that the parts are faulty, a quick MOT style inspection whilst the car is up on a lift could reveal where the problem is.

Post #679240 1st Dec 2023 5:37pm
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JayGee



Member Since: 27 Jul 2021
Location: London
Posts: 3200

United Kingdom 2012 Range Rover Vogue 4.4 V8 Orkney Grey

You had the complete stut and not just the airbag replaced? If so shocks can knock and have had this on other cars. 2012 TDV8 Vogue (L322)

Post #679246 1st Dec 2023 6:57pm
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Member Since: 30 Jun 2020
Location: Derbyshire
Posts: 451

United Kingdom 

Both have been changed, droplinks were the first port of call, no improvement. The knocking has only started since the struts were changed. We’ve tried it on the shaker table, and it sounds like the struts but both have been replaced in the past 12 months….however found this article and it feels the same position;

https://www.rangerovers.net/threads/l322-f...ed.223954/ L322 TD6 2003
Epsom Green- the dogs car which has worked it’s way into being the family car 😮

Post #679287 2nd Dec 2023 10:18am
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vs322



Member Since: 08 Apr 2020
Location: Athens
Posts: 584

Greece 2004 Range Rover HSE 4.4 V8 Java Black

I did have a Dunlop front strut that was knocking. Replaced both with Arnott, which in turn, after 60K km seem to knock slightly when the weather is cold for the first couple kilometers of the day...Nothing as bad as the Dunlop though and definitely something I can live with.

Post #679308 2nd Dec 2023 6:11pm
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Slow progress



Member Since: 30 Jun 2020
Location: Derbyshire
Posts: 451

United Kingdom 

That’s helpful, not sure if you can still get the Delphi ones so they’d be a good back up L322 TD6 2003
Epsom Green- the dogs car which has worked it’s way into being the family car 😮

Post #679311 2nd Dec 2023 7:32pm
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Weejock



Member Since: 30 Dec 2011
Location: UK
Posts: 417

2002 Range Rover Vogue 4.4 V8 Epsom Green

Delphi brake and suspension units, designs, intellectual rights and production lines were bought out by BWI in 2010. 'Delphi' suspenion units are still made but under BWI name.

Post #679319 2nd Dec 2023 9:47pm
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