Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

That very loud and painful "clunk"

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,028
1,025
As I sit waiting for roadside assistance, I can tell you that I now know that very loud "clunk" that precedes an entire car shutdown.

Tonight, as the light turned green on my way home, I accelerated and +BAM+ it felt like I got rear ended. The car immediately fell flat acceleration-wise, the direction/gear indicator turned red, and messages started popping up... "PULL OVER SAFELY... car is shutting down", "car needs service", "car may not restart", and eventually "12v battery low - car may not restart". I pulled over on the hill I was on and guided it to a side street, where we pushed it into a parking lot. After sitting for a few moments the car powered back up, Tesla advised me no current alerts were on the car and that I should be able to drive. At the next light, CLUNK again as I tried accelerating.

Luckily I was with some other owners at a local meet up event. They took the wife and kids home for me, and another driver stayed behind to take me home, I'll head there after we get it loaded and headed to the st Louis service center.

As I understand it from reports here, it sounds like I am due for a bit of major surgery with this one.

More to come...
 

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,028
1,025
The service center said they will get to it first thing, it's being towed there. It may mean a new b/c/d pack, unknown at this point what the cause is, we just know that the contractors are disengaging.
 

dave

Member
Sep 21, 2012
462
5
Greater Cincinnati
Wow, horrible news Flasher! I hope she gets fixed soon.

This message has me a bit paranoid now. Just tonight as we sat at a traffic light I heard a clunk and it felt like we had been very lightly rear ended. I turned on the rear camera, and the car behind me was way back. My wife felt it too. We thought it was very weird, but shrugged it off.

We didn't have any car problems driving home, but now I'm wondering if that clunk was actually something internal in the car...
 

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,028
1,025
You'll know it... this one is a major clunk followed by all sorts of bells and whistles going off... and it's unlikely to happen while just sitting there (although I suppose it could happen...)
 

apacheguy

S Sig #255
Oct 21, 2012
5,092
1,294
So Cal
Is it just me or has there been a surge of pack failures reported recently? Edmunds was the most recent and reported very similar symptoms as FlasherZ reports here.

@FlasherZ - how many miles on the odo?

My bet: drive unit.

My bet: HV Battery
 
Last edited:

FlasherZ

Sig Model S + Sig Model X + Model 3 Resv
Jun 21, 2012
7,028
1,025
19500 miles. I suspect battery at this point, as I sat in the car the symptoms got progressively worse. When the flatbed arrived, we were unable to get it to power up the drivetrain - car needs service, 12v battery low - and it wouldn't go into gear. I was able to get it into tow mode so it could be dragged into the truck. As of 12:15 the 12v system had gone dead and I lost remote telemetry. If it were drive unit, my guess is that I wouldn't have lost the 12v system charging.
 

qwk

P130DL
Dec 19, 2008
3,024
856
congratulations may be in order, you just may be a few days away from a brand new traction battery/inverter combo... hope it gets sorted quickly and has a happy ending!
Yes, Tesla replaces both the traction pack, and drive unit when the inverter fails. Although I wouldn't count on a "B" battery. Some of the latest A battery cars had their pack replaced with a refurbished "A" pack.
 

walla2

Member
Jul 15, 2012
501
228
This is the high voltage battery. You will get whatever battery they have in stock, possibly even my gently used old A pack. Hopefully, you get a new D though. Good luck Flasher. It appears that A packs fail at an unusually high rate (at least 3 Sigs in 3 weeks). This could be costly in the long term to owners and Tesla.
 

jdevo2004

Member
May 23, 2012
225
100
So what exactly causes the loud clunk? Is it a single battery exploding inside the pack? Is it some sort of huge arcing inside the electronics?
 

Bardlebee

Member
Apr 4, 2012
599
1
San Antonio, TX
I am worried, if I am to order my car next week as I literally am, should I expect troubles like this or like the 12V battery dying? I wonder if they fixed all these kinks in the system already or if I will eventually see it being a new owner and getting my car in 3-4 months.
 

Products we're discussing on TMC...

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top