SyncUp & Drive kills batteries/alternator

Why is there no reply from tmobile? I too had big electrical problems and I am scared to let my 16 year old daughter drive with something that is not tested enough. If I don't get an answer from tmobile I will raise hell on social media.

Good morning,

I am currently posting on this thread due to the fact that, I have purchased two sync drive devices in the past year. I added them to my BMW and Honda, Originally my concern was the notifications of disturbances were really slow. Then this past year soon after i connected the device to my BMW my vehicle died on me and would not turn on, my alternator and battery died, i did not think anything of it. I traded my BMW in for a Toyota highlander that same week of the malfunction. At this point friends and family suggested it might be the Sync drive, I looked past the comments. Sure enough this past December my Honda civic began to have electrical problems starting my vehicle, battery was recently new, and i also had to replace my alternator and starter at the same time. I have been maintaining my vehicle well, and this was unfortunate. The reason why i am writing this comment due to the fact that my vehicle needs to be inspected by today, and sure enough when i take it to the Inspection location they are unable to initiate the inspection due to my car not being able to turn on unless the Sync drive is connected. I contacted the T mobile support number and no one has answers for me, at this point I have lost my patience and am frustrated being that i have been paying for this service and devices and both of my cars that i utilized these devices on, have had issues that are in fact costly. I really need answers, I looked past all the trouble shooting aspects of the device being that i can live with minor, but having my second vehicle die on me this is outrageous and i refused to let this go without any answered or clarity.  

We had the same issue. I got the Sync-up when they first came out. Had minor issues all along but didn't make the connection that it was this device. My husband was driving my daughters car when it completely shut down on him while driving. He managed to get to the dealership and they told us to never use it, that they cause tons of issues. We didn't use it for 4-months but am trying it again til we find something similar (she doesn't drive far so we feel "okay" using It for the short, local drives).

I too, had issue with this device.  This device killed my battery.  My car stalled on the freeway and i was lucky to be able to pull to the shoulder.  Very scary.  This device is NOT safe and should NOT be promoted by TMobile.

Hmm, interesting. My car has been done recently and we've been at a loss for why it's been doing this. I've been having other small issues with the device saying a trip has ended, but it hasn't. I'm unplugging device and calling t mobile tomorrow about it.

I picked up a SyncUp on 12/21/18 and plugged it into my 2007 Chevy Silverado.  It connected no problem and appeared to be working fine.  Later that day the red battery light stayed on after the truck was started.  Voltage gauge showed the alternator was not charging.  I removed the SyncUp but the problem persisted.  I took the truck home and disconnected the negative battery terminal to reset the OBD2 system.  Two hours later when I started the truck, the red battery light went out and the charging system was working fine.  I repeated the scenario again today with the same result.  For some reason the SyncUp shuts down the charging system of the vehicle.  Obviously I am reluctant to plug it into another vehicle for fear of damage to that vehicle's charging system. 

Perhaps I have a defective unit or is there a problem with the programing of the unit?

Does T-Mobile have any idea of what the problem is ?

I also got the sync up Drive and it was put in my vehicle on Monday so it's been less than a week and I noticed the lights flickering on my dashboard in my speedometer needle and RPM needle. I assumed it was the sync up system trying to check my car system, I'm not sure? It didn't happen all the time but periodically while I'm driving and woke up this morning and there's absolutely nothing working on my car no lights absolutely nothing it's the completely dead my battery is less than a year old so now I have to try to tow the vehicle and I attempted to use the synced up roadside assistance after 3 phone calls and two of them being hung up on what they found is that the device doesn't start with the normal numbers and they can't find me in their system either so now I have to figure out how to get my car towed and figure out what's going on with it the device is still attached but it says it's offline. I'm not sure what's going on but I'm not really thrilled. I love the idea of the fact that the device lets me see what's going on with my car but these other problems are less than ideal and couldn't come at a worse time.

I just added a syncup drive to my 2017 Honda CRV two weeks ago.  Car is less than a year old.  It has worked with no issue for the past two weeks, but last night it killed the battery in my car.  Prior to this, there was an anomolie seen where the device kept saying it was offline and then the battery went dead.  after the anomolie, the care did start and I was able to drive to my next destination, but after two hours of being stopped at that desitnation, the car was dead, but the syncup drive was actually online again.

I believe the dead battery was caused by either the unit staying on, or it causing something else in the car to stay on.

I have removed the syncup drive and the battery has been fine..

Just checking in again on the ticket possibility! 😊

-Lauren

¡Hola!

Just wanted to check in and see if you were able to fine a ticket like Amanda suggested!

-Lauren