Technical Rattling (in and out of gear)

[Normy19]

Hello,

Recently heard a snap upon braking and since then the car has developed a rattle in front of the driver, both in and out of gear as though something is loose. In the last 5 months ive had a new alternator and clutch kit so i was wondering if any of those are to blame (had them looked at by the garages that fitted them who have said its not them causing the rattle). Also upon looking it seems one of the garages have taken off the small black plastic undertray on drivers side (where noise is coming from) and forgot to refit it so perhaps this is the cause of the noise? Also cant find this part anywhere online so any help would be appreciated. Anyway I've attached a pic of the undertray thats missing as well as a video of the noise (in neutral slightly revving). Doesnt make a noise while driving at speed (drowned out by other noises maybe?), but really noticable when setting off or parking up.

Cheers.

 

[Normy19]

Looking at ePER I think it’s 51769756 or 51754604.

 

[Normy19]

Problem Solved:

The cowboys that fitted the new alternator had bent the A/C pipe so that it was rattling against something. £60 labour later and it's now fixed.