toyota Aygo expression 2015 rear leak

[fabrice72]

hello just new on this site but have been reading for fews month .I have a Toyota aygo 2015 and since last week I am puzzle as I have a water leak in the rear but cannot understand how can this happen and why. any help I will really appreciate as when the car is park I get leak from the top either left or right ? I as you can see on a first picture it is wet on the top and the water glide on the side I I am puzzle.  

thanks in advance for any pointer on where could be the problem as the seal seem to be ok .

[Bper]

Hi Fabrice,

Try peeling the seal back to check if water is penetrating. Also spray a hose in the boot area and it should show up where the water is getting in.

[fabrice72]

13 minutes ago, Bper said:

Hi Fabrice,

Try peeling the seal back to check if water is penetrating. Also spray a hose in the boot area and it should show up where the water is getting in.

thanks what puzzle me is the patch on the top near the seal and the water running on the side from it if this does make sense 

[mrfixer]

 

This might help....

[fabrice72]

18 minutes ago, mrfixer said:

 

This might help....

nope as the water is getting inside the roof lining on the top I think but thanks for the thought 👍

[mrfixer]

9 minutes ago, fabrice72 said:

nope as the water is getting inside the roof lining on the top I think but thanks for the thought 👍

Have you watched the video?  He explains exactly how the water gets behind the roof lining.

[fabrice72]

6 minutes ago, mrfixer said:

Have you watched the video?  He explains exactly how the water gets behind the roof lining.

Will have a better look tomorrow day time but mine is a 2016 design so a tad different 

 

[mrfixer]

10 hours ago, fabrice72 said:

Will have a better look tomorrow day time but mine is a 2016 design so a tad different 

 

I have seen maybe a dozen of these cars with the problem (as explained in the video).  The upper hatch box section fills with water via the ill-fitting centre brake light. Then the water flows through the corrugated flexible tube into the roof space above the rear headlining. Result is damp headlining and in bad cases the water drips down from the headlining.

[Puglet]

Agree with Jim, on the Mk2 the main culprit is the 3rd brake light, seen few posts on here with owners of Mk2s saying 'water sloshing' in tailgate. Compared to Mk1 3rd brake light they recessed it better into boot hatch, but nothings perfect I suppose. Nice video find, thanks for that, wonder if Big sis will let me drill a hole in her Pug 108!

[mrfixer]

6 hours ago, Puglet said:

Agree with Jim, on the Mk2 the main culprit is the 3rd brake light, seen few posts on here with owners of Mk2s saying 'water sloshing' in tailgate. Compared to Mk1 3rd brake light they recessed it better into boot hatch, but nothings perfect I suppose. Nice video find, thanks for that, wonder if Big sis will let me drill a hole in her Pug 108!

That upper hatch panel is a remarkably poor bit of design and I do wonder how it got signed off for production without any drain holes.

Actually, when you look at the pressing there are two small 'flutes' formed at the bottom corner at each side. If they had continued the flute by a few millimeters it would have formed a drain. Possibly a mistake was made in the tooling....

[APS]

44 minutes ago, mrfixer said:

That upper hatch panel is a remarkably poor bit of design and I do wonder how it got signed off for production without any drain holes.

I think someone on the design team go the wrong end of the stick and rather than building a drain into the access hatch, they put it in the brake light 🙂

[Puglet]

If your talking design flaws then the Mk2 team probably got a 'gold' star if you compare it to the Mk1, think that design team did it on a Friday afternoon after long pub lunch. The Mk1 testing team also need a good smack, cos how the Mk1 rear end leaked in so many places and didn't show up in testing baffles me. Shame cos the Mk1 does have some nice design touches which for a cheap car are a pleasant surprise.

[APS]

14 hours ago, Puglet said:

Shame cos the Mk1 does have some nice design touches which for a cheap car are a pleasant surprise.

The HVAC controls on the mk1 are SO superior to the mk2. Big, chunky, clear, and intuitive. Backlit by a single bulb. Genius!

<apologies for topic drift>

[fabrice72]

well I did drill the famous hole and after using the dehumidifier the problem seam to be resolved as the water has somewhere to go now instead than the boot . thanks to all the reply 

[Stormchaser]

Where did you drill the hole?

Could you possibly take a photo.

Thanks

[mrfixer]

6 hours ago, Stormchaser said:

Where did you drill the hole?

Could you possibly take a photo.

Thanks

I would assume he drilled the hole as per the YouTube video guide linked above in this thread.  When you fully open the hatch you drill a small hole below the plastic access hatch.  I noticed there is a small 'bump' in the hatch pressing at this location and I drilled a hole there.  A lot of water ran out!  I also cut a notch in the access hatch foam seal so if the box section gets very full of water it can drain out there.

Note that water doesn't drain out of the hole until you open the hatch.  Anyway, its not a perfect fix but does seem to do the job. I guess you could drill small drain holes at the extreme bottom corners of the metal pressing but they would be visible with the hatch closed.

I'm amazed Toyota didn't include a proper sealing gasket around the centre brake light. Seems to be extreme penny-pinching.

[fabrice72]

On 11/14/2023 at 1:35 AM, Stormchaser said:

Where did you drill the hole?

Could you possibly take a photo.

Thanks

 

On 11/14/2023 at 1:35 AM, Stormchaser said:

Where did you drill the hole?

Could you possibly take a photo.

Thanks

same as the video .will upload a pic if needed