Hydraulic Belt Tensioner Crack!!

[Smudgemanuk]

As shown below I noticed my air con belt tensioner had quite a large crack in it.
Please excuse the mess, the car obviously has had an oil leak for a while, all sorted and clean now though.

Are these known to crack here? If yes, I don't want to get one from a breaker

 

[Stevo7682]

Not a lot of zeds came with aircon.
Had a look at mine of both the 2.8's both look ok.
Have you priced it new yet .
Stephen.

 

[Stevo7682]

Just stuck part number into ebay 30-40 quid for a new one.
Stephen.

Number 7 be the bit in your picture from what i can see .

Stephen.

 

[Pentode]

Yes! mine was cracked in just the same way. Had it replaced earlier this year.
Image of old one attached. As has been said, replacement was about 40 quid off e-Bay.