emailjillianne wrote:In short, we had a 2015 Chevy Spark EV with 3 brake failures. We just purchased a 2016 Chevy Spark EV a month ago and the brakes went out again. So this is 4 brake failures for us in a Chevy Spark EV. The tow truck who picked up our vehicle said he's towed a number of Spark EVs with the same issue. So beginning to wonder if this isn't a much larger issue but people haven't been posting online. Granted, the cars are only sold in 3 states so there aren't a great number of these cars on the road.
Can you give us any more details on the brake failures? Any dash lights? Are you able to "push through" the electronic portion of the brake pedal travel until the hydraulic friction brakes engage? What does the dealer say the cause is?
The electronic portion of the Spark EV (and Volt) braking system can behave oddly sometimes. Especially in low traction situations. And, customer add-on accessories (cell phone chargers, GPS units, HIDs, radar detectors, or anything else connected to the electrical system) have been known to cause interference/errors on the CAN bus that impact the brake computer. However, in all cases when that's been reported, the driver is still able to "push-through" the electronic portion of the brake pedal travel to engage the friction brakes. But, it does take some extra effort to do so. Failure of both channels of the hydraulic friction brakes is almost unheard of in any modern car.
I'd be amazed if I met a tow truck driver who knew the difference between a Spark and a Spark EV. The braking systems in each are completely different.
Since this problem followed you to a second car, I'm betting you have something plugged in that's causing CAN bus interference. Do you have anything connected that you moved from the old car to this one?