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Discussion Starter · #1 ·
Hi all, we lost control of our 2021 Accord last week on a freeway and hit the the barriers. What’s weird is that our car started to swerve left and right a few times before the accident. It happened all of a sudden while we were driving straight around 1pm at about 70mph without hitting any bumps. Really don’t understand what happened. Now the front left wheel got tucked up into the fender and the lower control arm snapped. We only had adaptive cruise control on but not lane assist, and we didn’t over correct the steering wheel when the car started swerving because we knew over correction can cause the car to go sideways or even flip over. Can anyone share some ideas on what might have happened? I remember the dashboard was flashing some red things while swerving: something like hi…lock… luckily no one got injured and we didn’t hit other cars… Honda dealer basically denied that there could be any defective parts. Also, the lower control arm snapped in two locations: one of them completely broken, the other with a small crack. The rear left wheel is now also a bit warped. Thanks!
 

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07V6 EX-L Chicago
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Defective control arm.

While driving, the control arm cracked and broke, which caused you loosing control.
Also, when the control arm broke, the wheel speed sensor detected inconsistency, the car activated ABS.

Honda won't admit it or willing to help, before there is a substantial number of complaints. You may have to work with your insurance company to get the car repaired.

Do file a complaint with NTSB. This could be a serious defect that would get someone killed.
 

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Discussion Starter · #4 ·
Thanks for the helpful info. Already opened a case with Honda and raised a complaint with NHTSB. Honda just said they wouldn’t inspect as visionguru suspected since there’s an accident unless there’s private investigator’s report blah blah. Not sure if I have to NOT repair the car to gather evidence against them or just take the hit not sure about the chance of winning … Checking out some other options …
 

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There is data in the SRS/ABS controllers that will show all sensors and inputs from the driver. You are the owner of that data and can pay to have a complete forensics of the data.

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Defective control arm.
Concur with you.
The part is defective, and it is manufacturing defect in the casting process.
The casting has inherent 'sand holes' which should have been rejected by QC before machining of said castings into parts.
All castings in the similar 'pour' or batch of casts may face similar QC problem, some of which leading to eventual fatigue failure mode.
This type of fatigue failure (in maintenance speak) is not unusual in the business of casting foundries.
In a way, it is NOT a machining fault.
 

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The heavy hit the front left wheel took might have something to do with the broken control arm.

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Unless you had prior accidents that weren’t fixed properly, this should 100% be covered by Honda assuming it happened 100% as you stated.

Be ready to escalate up the chain and document everything. Get legal counsel if things don’t turn out exactly as you expected.

You spent good money on a new car. You shouldn’t need to deal with this kind of BS.
 
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