Drive Accord Honda Forums banner
1 - 13 of 13 Posts

·
Registered
Joined
·
4 Posts
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!
 

Attachments

·
DA since 1st car
07V6 EX-L Auto
Joined
·
1,775 Posts
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.
 

·
Registered
Joined
·
4 Posts
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 …
 

·
Registered
Joined
·
5,338 Posts
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.

Sent from my Pixel 5 using Tapatalk
 
  • Like
Reactions: jkd77433

·
Registered
Joined
·
53 Posts
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.
 

·
Registered
Joined
·
5,338 Posts
The heavy hit the front left wheel took might have something to do with the broken control arm.

Sent from my Pixel 5 using Tapatalk
 

·
Registered
Joined
·
2,358 Posts
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.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #11 ·
Thanks for all the replies. We really wanted to get the crash data before sending it to repair or back to Honda. So this is the comments we got after accident reconstruction investigator pulled the EDR data with the certain pages (to anonymize it) of the report attached here:

Comments:
  • The driver and passenger seat belts were both buckled at the time of collision. At 5 seconds prior to impact, the cruise control was active, and the Honda was traveling 81 mph with the accelerator pedal and brake pedal not depressed. The vehicle then maintained speed until 2.5 to 3 seconds prior to impact, when the adaptive cruise control disengaged, and the steering wheel angle increased from 5 degrees to 145 degrees to the left. The anti-lock braking system (ABS) was engaged with the brake pedal not applied at 2 to 2.5 seconds prior to impact. At 2 seconds prior to impact, the Honda was traveling 71 mph and the steering wheel angle was 115 degrees to the left. At 1.5 seconds prior to impact, the steering wheel angle was 115 degrees to the right with the ABS not activated. The brake pedal was then applied 1 to 1.5 seconds prior to impact with the ABS re-activated. At this time, the steering wheel angle was at least 250 degrees to the right (250 degrees is maximum steering angle recorded by EDR). The Honda was traveling approximately 25 mph during impact with the center median wall. As result of collision, the Honda experienced a total change in velocity (ΔV) of around 8.9 mph (4 mph in the longitudinal direction, 8 mph in the lateral direction). Table 1 summarizes the brake pedal activity, ABS activity, and steering wheel angle of the Honda Accord during the 5 seconds leading up to collision.
  • The EDR data indicates the ABS system was initially activated at 2 to 2.5 seconds prior to collision while there was no brake application.
  • The ABS is not expected to activate when the brake pedal is not depressed. The ABS system then re-activated at 1 to 1.5 seconds prior to impact.
  • The Honda EDR only recorded one event, corresponding to the Honda’s left front collision with the center median wall, causing the side curtain airbags to deploy. There was no triggered event for an impact to the Honda’s left rear. The form and degree of localized damage to the Honda’s left rear wheel, left rear rim, and left rear suspension is not consistent with the Honda contacting the concrete wall, as there was no evidence of scraping, scuffing, deformation, or indentations to the body of the Honda surrounding the left rear wheel. It cannot be ruled out that Honda experienced a malfunction or failure to the left rear suspension just prior to the subject collision, resulting in the Honda’s lateral movement towards the wall.
  • Considering the Honda EDR shows pre-impact data that is not consistent with typical driving behavior (i.e. sudden sharp steering to the left and right), driver's assertion that she did not apply any braking or steering prior to the vehicle’s unexpected left/right maneuvers, and the anti-lock braking system suddenly engaging with no brake application, and a further investigation of the Honda Accord should be conducted to better understand the cause of the Honda’s sudden movement towards the center median wall.

Our questions:
  • Why would we hit the left wall while the steering wheel was at a scary 250 degree to the right at impact at 29mph???
  • Could it be possible that from -2.0 to -1.5 seconds, driver steered from left 115 degrees to right 115 degrees in 0.5 seconds??? A change of 250 degrees sharp steering at speed 51 - 71 mph ??? I was on the passenger seat and didn't see sharp turns at all. Driver said you would change hands for that big turn and it for sure didn't happen. There was only small adjustment to try to keep it straight. We don't remember skidding either at that point. It's very confusing......
  • What could stability control be doing to the steering, etc., during this incident?
  • What part or sensor could have gone wrong or have design problems to cause the car thinks it's losing traction control, rear wheel bending with no EDR impact detected, and thus this accident?

NHTSA also just reached out to us to collect more info, police report, etc. The problem now is that we don't want to repair the body work of the car until we know the root cause of the issue to prevent this from happening again that may kill people. Honda hasn't been cooperative so far but is willing to reconsider their decision after they see this report. Will wait and see... and love to hear opinions here... Thanks!
 

Attachments

·
Registered
2021 Accord Hybrid Touring
Joined
·
40 Posts
This is really interesting. Thanks for posting and please follow up when you have more info. I don’t have anything meaningful to offer unfortunately but I’ll be following to learn more. It sounds like no one was hurt?
 
1 - 13 of 13 Posts
Top