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Like yourselves, my first reaction was that these rubber or plastic grommets are covering holes that are probably water-drainage holes. But could the holes more likely be for wax-injection, performed during the final stages of the production of the vehicle? It would then make sense to thereafter block them off with grommets.
Blanking off holes in car bodywork is often done to prevent wax that has been injected into various cavities, cills, and box-sections from later running out through the holes. Such waxes normally set fairly hard but have the potential for melting, and therefore running out, in very hot weather.
I'm not saying this is the answer to your observation but am suggesting it as a possibility.
My car also have three rubber Gromets except the middle one near the " locking badge" has a hole and the one's either side are Covered.
Not sure whether this is normal?
Rocky5 wrote: ↑Fri Sep 20, 2019 3:27 pm
My car also have three rubber Gromets except the middle one near the " locking badge" has a hole and the one's either side are Covered.
Not sure whether this is normal?
I think the centre grommet with the hole is meant to be like that, assuming this design is the same as the mk7 Golf which also has this centre grommet with a hole in it.
On the Golf, there’s a thin hollow tube inside the tailgate that’s attached to this grommet - the other end of the tube is (I think) attached to the bottom / underside of the tailgate badge/ handle inside the tailgate cavity. The tube is there to drain any water that can collect in the recess behind the badge on the tailgate handle when it rains or from washing the car - the water runs down the tube and out through the grommet.
Rocky5 wrote: ↑Fri Sep 20, 2019 3:27 pm
My car also have three rubber Gromets except the middle one near the " locking badge" has a hole and the one's either side are Covered.
Not sure whether this is normal?
I think the centre grommet with the hole is meant to be like that, assuming this design is the same as the mk7 Golf which also has this centre grommet with a hole in it.
On the Golf, there’s a thin hollow tube inside the tailgate that’s attached to this grommet - the other end of the tube is (I think) attached to the bottom / underside of the tailgate badge/ handle inside the tailgate cavity. The tube is there to drain any water that can collect in the recess behind the badge on the tailgate handle when it rains or from washing the car - the water runs down the tube and out through the grommet.
You are correct also my polo build at spain have both of gromets on sides. Guess it is normal
"......they say those two holes are for liquid drainage during the Anti-Corrosion Galvanizing process in the production line".
As I said in my own response to this topic, I suspected there being a strong possibility that the holes were for wax-injection or similar, at time of production. So it seems that my hunch about that was correct. The tailgate is, I believe, fairly well protected against the weather, maybe the only likely entry of water being via the badge, so I guess that's why they leave one of the holes unbunged, just to let the water or moisture out in the event of it getting inside.
Over on some of the Golf forums, there have been a few instances of the rubber drain grommet perishing with age and the drain tube becoming detached, resulting in water draining into the tailgate cavity. Replacement grommet and fitting a new tube is cheap but the cost of getting this fixed at the dealers if it happens outside the warranty period can be expensive. Apparently it’s a cheap and fairly easy DIY fix though.
Thanks.
also my polo build at spain have both of gromets on sides. Guess it is normal