Just purchased a 58 plate fiesta as first car for my daughter last week. Noticed a small puddle of water under the boot carpeted floor (were the spare tyre goes), but just put it down to water from the car getting a full valet.  Mopped it up but since noticed it again and also the under side of the carpeted floor on the sides is soaking but strangely not the top of the carpeted floor so if you didn't lift the carpet floor up you would never notice it.  No obvious signs of water ingress, and unable to pin point as no obvious sign of wear and tear.  

Any ideas?

Cheers

A few places where water gets in on the old Fiesta......

Rear lights - Foam/rubber seal.
Rubber boot seal joint split at the catch.
Mastic sealed edges up near the hatch hinges has split.

Thanks for your reply.....is it easy enough to rectify for a non car DIYer?

2 hours ago, Ian Lanc said:

A few places where water gets in on the old Fiesta......

Rear lights - Foam/rubber seal.
Rubber boot seal joint split at the catch.
Mastic sealed edges up near the hatch hinges has split.

 

31 minutes ago, Newbie2411 said:

Thanks for your reply.....is it easy enough to rectify for a non car DIYer?

Yeah! The rear lights can be removed by two torx screws and a plastic butterfly nut which is behind the lights behind the carpets, pull the carpets away, then put your hand into a large hole, just feel for a finger tightening nut, don't drop it or it'll be gone forever, removing the light pull the whole unit towards you as you stand behind the car, light has a electric coupler, just check the light seal looks in good nick.

The rubber boot seal......Look to see if the joint is split/corroded, if it's badly corroded & split, water can get through that area.

Look at the mastic seal at the top, if everything like nice, then it's not getting in there, if it's split, carve out the bad stuff, dry it out thoroughly, then push in silicone sealant.

Oh there's also the rear air ducts which can give issues.
 

 

Also vents and gaffa tape covered holes behind the bumper

Youtube has many videos on this subject 

How the rear lights come off.......
 

 

1 minute ago, Danny cj said:

Also vents and gaffa tape covered holes behind the bumper

I'd just about forgotten about the vents! We've never had any water leak issues, but the daughter in laws 13 plate gets water in hers but she's not bothered!, hers is leaking through them vents.

11 hours ago, Ian Lanc said:

Yeah! The rear lights can be removed by two torx screws and a plastic butterfly nut which is behind the lights behind the carpets, pull the carpets away, then put your hand into a large hole, just feel for a finger tightening nut, don't drop it or it'll be gone forever, removing the light pull the whole unit towards you as you stand behind the car, light has a electric coupler, just check the light seal looks in good nick.

The rubber boot seal......Look to see if the joint is split/corroded, if it's badly corroded & split, water can get through that area.

Look at the mastic seal at the top, if everything like nice, then it's not getting in there, if it's split, carve out the bad stuff, dry it out thoroughly, then push in silicone sealant.

Oh there's also the rear air ducts which can give issues.
 

 

Thank, appreciate the info.

 

This is what worked for me.

 

On 12/20/2023 at 10:56 PM, orangecurry said:

This is what worked for me.

I've often wondered how the big long black strips are secured in that channel! How is it held in place ?

Normal double-sided tape... but as the black plastic strips are in a recess, they are unlikely to free themselves.