This goes between the back of the propshaft on a 4x4 DSG and the nose of the rear diff. Ours had cracks in it two years ago (2017 car with 60,000 miles) and this time, when I change the rear diff oil, I thought I might as well change the coupling too, as I don't suppose it's fixed itself in the meantime!

I was a bit taken aback to find a genuine Skoda one was six-and-a-half-hundred quid though! 😱

Part number seems to be

5Q0 521 307 or

1K0 521 307 or

1K0 521 307 A

I can find pattern versions online for as little as £65, with most from brands I've heard of, being about £150. Does anyone have any experience of these and could recommend any particular brand(s), please?

I'm guessing the situation will be the same as it was on our Mk2 Octavia 4x4 in that Skoda will only sell you the coupling with a propshaft attached and not just the coupling - hence the price?

As to the coupling I think a few people have done these now on various models but not the Kodiaq.

My question is is it causing a droning noise at speed under load - so say around 2300 RPM in top and more noticably under load and when accelerating? If not then it's probably OK for a while yet as that droning was the first indication of it having issues on our Octavia. Having said that it started at about 70,000 miles and we continued to run the car to about 115,000 miles with no issues - just the noise. In the end we didn't bother to replace the coupling as the car started with other issues that were going to cost more to fix than the car was worth.

However, a local VAG specialist was up for replacing the coupling alone, having done similar on an Audi A3, and that was just the coupling alone using a Febi (I think from memory) pattern part at about £100.

Edited 19 September, 202519 Sep by skomaz

Thanks for the prompt reply! No, we haven't noticed any noise yet. It was just something that I thought "didn't look right". Maybe I'll leave it a bit longer.

Must admit, the photo doesn't show a nice new propshaft with it!

https://www.skoda-parts.com/spare-part/5q0521307-flexible-disc-4x4-rear-skoda-22108.html

That price is mental if it's just the coupling!!!

21 minutes ago, skomaz said:

That price is mental if it's just the coupling!!!

Pretty sure a Porsche Cayenne 958 Guibo is cheaper!

Alternative at the same page:

https://www.skoda-parts.com/spare-part/5q0521307-flexible-disc-4x4-rear-germany-oe-producer-22812.html