Belt tensioner roller replacement for Fabia 1.4 MPI with air conditioning

If some of you have a bad tensioner and you are not willing to pay 80 euros for a new complete one from INA there is a 15-20 euro solution.

In most cases, only the roller fails due to age and there's no reason to buy a new complete one with the metal rod.

You can buy INA 531 0760 10 roller/tensioner pulley and just replace the worn part, it's identical to the original roller.

I wasn't able to unscrew the original screw (I believe that it was Torx T30, standard right thread), so I took an angle grinder and made a cut that's flush with the screw head (don't worry, you won't damage the metal sleeve insert, but be careful the paint on it cannot withstand pliers, you'll end up with chipped paint as I did). Once the screw head is cut you can unscrew the rest of it with your fingers since there's no tension.

For a replacement screw I used M8x40 10.9 grade with stainless steel washer (don't remember the diameter, find one that covers the inner race fully). Additionally I added a lock nut on the other side to make it extra secure (if you don't want to add a lock nut you can use M8x35).

Cheers!