High surface rust on front suspension, normal?

Old 02-01-2019, 02:47 PM
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High surface rust on front suspension, normal?


Bought my RDX with 4 miles on the odometer. Vehicle has only been in central FL for 1600 miles. Changed out my wheels and this is what I see on both sides in the front; the bolts and such are highly corroded also. LKAS, ACC, brake mitigation, etc lights are all on for last 4-500 miles. Anyone has similar issues?
Old 02-01-2019, 05:38 PM
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Originally Posted by specie

Bought my RDX with 4 miles on the odometer. Vehicle has only been in central FL for 1600 miles. Changed out my wheels and this is what I see on both sides in the front; the bolts and such are highly corroded also. LKAS, ACC, brake mitigation, etc lights are all on for last 4-500 miles. Anyone has similar issues?
I will check mine out because I live in Minnesota and we get blasted by salt. A lot of suspension components they don’t paint and as far as I know surface rust protects the interior metal. But for the low mileage yours seems a bit excessive. I honestly don’t think I would worry too much. I do know one factor that causes rust on vehicles is living in high humidity climates, and Florida no doubt fits that bill. That’s why places like Colorado, Arizona, California you don’t see cars rust like in Minnesota, Michigan, and even down through the south east USA. I’ll check mine when I get home. From what I could tell a lot of the suspension parts are aluminum luckily so no worries about rust
Old 02-02-2019, 11:50 AM
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Same rust on mine. I noticed the rust less than 100 miles on the vehicle. Next time at the dealer I will ask them.
Old 02-02-2019, 10:20 PM
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Is your suspension covered in salt or something?
Old 02-03-2019, 11:55 AM
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Maybe 4-5 days of some rain and the rest of the month in sunshine. Car only been on road less than 30 days.
Old 02-03-2019, 11:57 AM
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Originally Posted by specie
Maybe 4-5 days of some rain and the rest of the month in sunshine. Car only been on road less than 30 days.
do you live close to the ocean?
Old 02-03-2019, 12:31 PM
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This is the only vehicle (out of 10+) I’ve had in the last 20yrs that has this issue. Ironically, this is the only new vehicle I’ve ever bought. Rust isn’t a concern in FL compared to northern states that uses road salt.

Last edited by specie; 02-03-2019 at 12:35 PM.
Old 02-04-2019, 05:16 PM
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Normal. The steering knuckle is cast iron. Cast iron rusts. Eventually, it will "mellow" into a darker, less noticeable color rather than the bright orange flash rust.

Usually cast iron has a thin black coating, but it doesn't necessarily last very long.

This has NO impact on safety or performance; purely cosmetic. Even with the surface rust, the steering knuckle may be the last thing left of the car after "retirement", unless the car gets melted down for recycling.

BTW, "specie", are you sure you have compatible TPMS sensors installed in the wheels you swapped onto the car?

Last edited by Wander; 02-04-2019 at 05:21 PM.
Old 02-04-2019, 07:12 PM
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Originally Posted by Wander
Normal. The steering knuckle is cast iron. Cast iron rusts. Eventually, it will "mellow" into a darker, less noticeable color rather than the bright orange flash rust.
Agree with the cast iron but what about the bolt heads in the first picture? The only time I've seen anything like that here in CA is on boat trailers and boat motors used in the ocean. It almost looks like there is some electrolysis between dissimilar metals or something going on.
Old 02-04-2019, 07:34 PM
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Originally Posted by GW208
Agree with the cast iron but what about the bolt heads in the first picture? The only time I've seen anything like that here in CA is on boat trailers and boat motors used in the ocean. It almost looks like there is some electrolysis between dissimilar metals or something going on.
Yeah, that is strange if it's only been in central FL; I skimmed by that part. Pretty typical for the salt encrusted north this time of year, but unless it has been exposed to salt it's hard to explain that. I assumed it was salt deposits.

Did they lay down road salt during the recent freeze? Here in the frozen north we have car washes with undercarriage sprayers to deal with such things, or at least make us feel better.
Old 02-05-2019, 07:57 AM
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Apparently that’s normal. When I purchased my 2013 Accord, the same was rusted so I wasn’t too surprised that it’s rusted on the Acura.
Old 02-22-2019, 12:30 AM
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Originally Posted by Wander

BTW, "specie", are you sure you have compatible TPMS sensors installed in the wheels you swapped onto the car?
I bought a set of tpms from oemacuraparts for $115 shipped. They work perfectly.

The service advisor said they’re approved for the replacement of the steering knuckles. My camera (for ACC, lkas, etc) is still on backordered....
Old 02-22-2019, 12:38 AM
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Originally Posted by specie


I bought a set of tpms from oemacuraparts for $115 shipped. They work perfectly.

The service advisor said they’re approved for the replacement of the steering knuckles. My camera (for ACC, lkas, etc) is still on backordered....
so they agreed that the rust was more then normal?
Old 04-16-2019, 12:10 AM
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FWIW, here's a view of one of my steering knuckles while I was swapping off winter tires/wheels. Note the mellow tan patina, like well worn leather.

But also note the relative lack of corrosion on other components. If I didn't know better, I would think OP's vehicle spent some time partially immersed in salt water.


Last edited by Wander; 04-16-2019 at 12:14 AM.
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Old 05-20-2019, 04:20 PM
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Same here in Arizona

My son and I were installing a set of caliper covers and we noticed said part after removing the wheel. Mine has it too, and we’re in Mesa, the bigger city near Phoenix. Weird but true....
Old 05-21-2019, 01:49 PM
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This is normal, and doesn't affect the integrity of the part. It's surface rust and actually protects better than paint(s).
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