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I just scared myself half to death watching YouTube videos about blocked draining tubes on car sunroofs.

Having never owned a car yet with one (GT Sport Tech hopefully soon) I was just wondering if the sunroof and its dependancies gets examined during a service routine?

Don't see any comments on existing issues regarding the above in this forum so fingers crossed things have improved technology wise so leaks are few and far in between.
 

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2020 CX-30 Premium FWD in Machine Gray Metallic
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I had this issue with my '87 Acura Legend as I did with the condensate line in my '84 Scirocco. In both cases, the solution was compressed air to clear out the line.

This does not work with T-Tops.
 

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'20 CX-30 AWD, 2000 Millenia & 2006 Mazda3
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I have two Mazdas besides my current new CX-30. I bought both new and each have a power sunroof. My Millenia (aka Xedos 9) is a 2000 model and my "3" is a 2006. I've done little more than keep the glass clean, with the roof open I'll wipe around the opening and occasionally I'll wipe the rubber edging with some sort of silicone spray. I've never had an issue with either of them leaking or failing to open/close. I've never opened them that much though. They've been fairly foolproof. Now that I say this, something will happen. :rolleyes:
 

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2020 Mazda CX-30 Deep Crystal Blue Mica - Premium
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Not like keeping the drains clear on my Miata. :)
 

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2020 CX-30 GT Deep Crystal Blue Mica
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I have two Mazdas besides my current new CX-30. I bought both new and each have a power sunroof. My Millenia (aka Xedos 9) is a 2000 model and my "3" is a 2006. I've done little more than keep the glass clean, with the roof open I'll wipe around the opening and occasionally I'll wipe the rubber edging with some sort of silicone spray. I've never had an issue with either of them leaking or failing to open/close. I've never opened them that much though. They've been fairly foolproof. Now that I say this, something will happen. :rolleyes:
This is the best way. Every year, ideally before winter, just go around and clean up all the rubber seals with a rag and some silicon spray. It is $5 and will last you a lifetime. Keeps all the seals nice and fresh.
 

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I'm OCD. Each spring and fall I take WD40 to all door locks...house, shed and car, spray the door/trunk/hood seals and spray all hinges. Yet you won't catch me washing the thing nor taking a vacuum to it. 🤪 I guess when you're autistic it's not you that's weird...it's the world.
 

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Saw this Reddit post and immediately went here to search our forums for moonroof drain! o_O

https://www.reddit.com/r/Justrolledintotheshop/comments/onfq0w
The US CX-30 manual only mentions drain holes at the "lower edges of doors, rocker panels, and frame members" that that should not be clogged. Water trapped there will cause rusting:

Quick search online for "CX-30 sunroof drain" pulls up the exploded diagram for the moonroof. Numbers 17 and 18 below are the drain hoses. I'm guessing that these run to the drain holes somehow? I never really noticed the drain holes in our CX-30.

2433
 

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2020 CX-30 Skyactiv-X MHEV GT Sport Tech
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I'm OCD. Each spring and fall I take WD40 to all door locks...house, shed and car, spray the door/trunk/hood seals and spray all hinges. Yet you won't catch me washing the thing nor taking a vacuum to it. 🤪 I guess when you're autistic it's not you that's weird...it's the world.
A better option to WD40 might be to use white lithium grease in a spray. It lasts longer as a lubricant and works better on hinges etc?
 
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2021 CX-30 GS AWD 2021 CX-30 GS FWD
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I have never had a problem with drains on my sunroofs. I think keeping my cars in a garage helps a lot. I did have a problem on my 2018 Mazda 6 Turbo last month on my trip to Canmore Alberta. Travelling through Medicine Hat my sunroof panel literally " exploded " ---scared the hell out of myself and my passenger, I enclose a picture. Note that less than about 10% of the glass fell in the car --- the remainder travelled upwards and then fell on the trunk lid. No rocks hit the glass and the temperature was about 21C in the car and 25C outside with bright sun.
I found a new glass panel at a Mazda dealer in Calgary and replaced it myself -- total cost $392. My car was 4 weeks beyond the 3yr warranty so no point in complaining. I did notice the glass is very thin compared to earlier cars I have owned, such as 2nd and 3rd Gen RX-7s and my Millenia S.
No more sunroofs for me!
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