Seeing that you already have a large hole, careful use of a step drill might be your only option, lots on ebay and amazon... time is not on your side though [emoji25]

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Seeing that you already have a large hole, careful use of a step drill might be your only option, lots on ebay and amazon... time is not on your side though [emoji25]

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That is a good shout if I had one. Might be able to pop out and get one

 

Toolstation and Screwfix have them also [emoji1696]

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Well I got really lucky, a guy in the warehouse next door had a step drill! Thanks for that recommendation! So I had a go and what a great piece of kit. Wish I had used that from the start! So now my rear sensors all fit but due to upgrading my bumper to a T5.1 and with my sensors having the circular centre part that clicks into the surround which is slightly oval (hard to explain but oval at the top), which I guess is to do with allowing the sensor to pick up lower down items? Not sure....

so with the new bumper there is a slight ridge along it and the oval lip at the top of the sensor is now being pushed out by this ridge. I may have to use some black silicone to keep the sensor attached to the bumper but sadly I don’t think it will be flush.

I didn’t want to have to buy new sensors when these worked just fine but new ones may have had smaller sensors?

anyone else come across this issue? How would you say is best to adhere the sensor on and pull it in tight flush to the bumper whilst some glue/silicone cures?

 

I will get a picture tomorrow so you can see what I’m on about but due to the holes being drilled a little last minute I suspect they are now not as snug as they should be as well.

I’ve come this far I can’t go back now!

 

Result... [emoji106]
Our's is a 5.1 but without a ridge (uniform oblong reflectors) so not sure how yours is.
Could you not "scallop" the tops of the housings to sit flush against the ridge?
Sometimes the oval bit (wedge?) is discarded when used on a flat(ish) bumper.
Let's see your pics as "a picture is worth a thousand words" ...

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Google to the rescue... Yep these are the newer 2012 onwards... not noticed before[emoji849]

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I don’t know the brand of my reverse sensors to even look for more circular housing for each one. Must be that shape for a reason? I just need it to be pushed in a little more with some black adhesive and at least I know it’s not going to fall off and the gap is a little smaller.

 

Have you tried turning the housing 180 degrees as the sensor seems to be pointing upwards as it is now, and turning them will have the sensors pointing straight back... it MIGHT also give you a tad more room to clear the ridge [emoji848]

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That is a good point the sensors are not facing straight and are more up aren’t they. I put the sensors into the housing so it may be I need to turn the sensors inside 180 on some of them to face more straight. The housing however I think it correct this way up? I’m starting to wonder now...... but if I could turn the housing around it would solve this problem!

 

As the saying goes... You can but try. [emoji39]

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