04-16-2022, 02:17 PM | #1 |
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Be-aware of BMW tire caps
So, a word to the wise, and partly my fault.
I always check tires monthly, since getting TPMS I have been checking it using the system, not an airhose as a result I didnt remove the caps for MANY MONTHS. Now I bought official BMW tirecaps (metal) and the salt corroded them to the tire sensors, meaing my tire guy needed to use a pair of channel locks to remove them, This was weird because last season on my 1 series I had no problems Then remember that the TPMS sensor is not BRASS as an ordinary vavle cap would be but some kinda alloy. and the BMW metal cap covers have BRASS inserts. Physics 101 on 2 dissimilar metals, salt, ice snow.... CORROSION, NOW, had I removed them monthly I would have had no problem, but I think since beginning of season to now they were not touched. His worry was it could have snapped the TPMS sensor. Luckily all I got for my trouble is 4 gnarlly and torn apart valve caps but the sensors where all good. he slapped some A/sieze on them so it should happen again I'll see if I can get some pictures ! |
04-16-2022, 04:08 PM | #2 | |
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04-16-2022, 04:55 PM | #3 | |
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WOW interesting,
NOW, I know they have the BMW M on them and I got them from my dealer, I just picked them up from a shelf, didnt bother to ask but these are they Quote:
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04-16-2022, 05:14 PM | #6 | |
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I do wish some aspects of our cars weren't so involved. Oh well, at least they have M stripes everywhere you look; that's not such a bad tradeoff, right?
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2017 M240i: 25.9K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; Full PPF |
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04-16-2022, 07:45 PM | #7 |
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yeah there is that, next time I speak to my parts guy's guy I'll have a word with him, but it kinda makes sense that there is a specific part, BMW, high end luxury sports car as such I guess you can't just put any parts on it LOL even OEM it seems
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04-17-2022, 08:04 AM | #8 |
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BMW caps came with a warning that the dissimilar metals could corrode - this was a decade or so ago.
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04-17-2022, 08:21 AM | #9 |
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txs to be honest, these came from my old 1 series as said, so was working fine (brass on brass) I didn't see any warning, could have been on the instructions. and I guess as I said physics 101 right.
I'm sure other people hae this, I just picked them up from parts they were on display, I may or may not have asked, I may not have thought it was worth asking. I'm guessing any parts which could have a problem should probably not be on display as if they are just bog standard works on anything kinda part. As I said something that looks pretty for your car maybe should have a health warning LOL as I said just a warning, now I know, also I should have been manually checking my air psi. |
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04-17-2022, 11:53 AM | #10 | |
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