Hi

First post although have used the site for answers to Octavia issues.

I have a leak in the boot, I don't think it is the tailgate rubber seal as the other seal on the left side has come away.

2020 octavia se technology tsi.

Should have taken a pic in daylight but trying to get the name of the rubber strips on the boot like the attached image?

Alex

Edited 23 September, 202523 Sep by AlexHugh
Said lid when on boot

Attached pics from car with strip that is falling off.

I don't think that strip coming off is the cause of your leak... It's just a noise reduction seal and I can't see how water would get into that central polystyrene section from a leak past it.

I'd actually suggest that it's much more likely that you have a leak coming in round the rear wiper grommet, into the space behind the trim on the rear hatch and then down into that polystyrene tub, potentially after first having drained onto the top of the main hatch seal.

I had the same on our Kodiaq and it took a while to track it down but the wiper grommet was the cause and was solved by resealing it against the glass.

Does the rear washer actually squirt water onto the screen? Mine on my first Octavia stopped squirting and I found that the pipe from the motor had become detached inside the boot lid and the water ended up exactly where yours has.

12 hours ago, skomaz said:

I don't think that strip coming off is the cause of your leak... It's just a noise reduction seal and I can't see how water would get into that central polystyrene section from a leak past it.

I'd actually suggest that it's much more likely that you have a leak coming in round the rear wiper grommet, into the space behind the trim on the rear hatch and then down into that polystyrene tub, potentially after first having drained onto the top of the main hatch seal.

I had the same on our Kodiaq and it took a while to track it down but the wiper grommet was the cause and was solved by resealing it against the glass.

Thanks, will check out the

wiper grommet.

Thanks, yes the rear washer squirts onto window.

Even more water in the boot well, used the back wiper and fluid Sat on bumper ledge, could this be source?

Do you have screenwash in the washer bottle and does the water in the boot smell or taste of it?

If so then that could be the cause if you have a split hose or similar within the rear hatch.

There is screenwash which is coloured and scented but the water was clear and no odour.

Sounds like that's not your answer then and it's rainwater.

Now you've got the boot empty it's probably worth drying it all out and then soaking the back. Of the car to see where it's getting in.

Have you checked the light clusters etc are OK and properly fitted?

Edited 25 September, 202525 Sep by skomaz

I had thought if rainwater there would be more water but suppose depends how long it started, was only on Saturday bringing the shopping in and the bags were wet underneath that we noticed.

Drying it out just now as had a few dry days, to be rain on Saturday, will check afterwards then will hose down after that.

Lights and wiper grommet looked ok today.

My old MK2 estate leaked around the high brake light. I thought it was washer fluid but it was seeping in past the seal. It also used to come in in base of boot near spare wheel as there was a damaged grommet . I dried car and then sat in boot during car wash. Got some really odd looks but found leak.

Alasdair

I once had the large rubber boot "drain" plug smaller than the hole, in that it moved around in the hole.

the leak only occurred when the roads were really running water hard.

Thanks for all the suggestions which I checked without success. Sat in car during torrential downpour and no source of leak. Took car to garage, they repaired the rubber strip but they dont think this is the where the leak is coming from but to test it over the next couple of days and if still leaking to take to a coachworks. Checked, tailgate seal, lights, wiper and grommet Also hosed it and couldn’t see leak source and had it on the ramp to check underneath without success.

Back to the drawing board...

Edited 1 October, 20251 Oct by AlexHugh
Correct typo.

@AlexHugh

I know, I know!

Bit suprised it hasn't been mentioned yet, but stuff gets missed. In MQB cars (at least this generation) there are vents that cause exactly this problem - the spare wheel well filling with cleanish rainwater.

You can replace them, seal them up, and the problem should be solved. It is probably a bumper off job, but it can be done from inside the boot if you know what you're doing.

https://www.seatcupra.net/forums/threads/leon-st-pond-in-boot.472518/