I was driving N/B 101 freeway w my wife at approx 70 mph. I felt the rear end slip ever so slightly and thought maybe I somehow lost traction w the road. I continued driving and it occurred twice more in the span of a few miles. I then realized it was unlikely I continued to lose traction with the road. I told my wife something felt wrong and began to maneuver from the #1 lane to the shoulder. I slowed to 50 mph and continued straight w my foot off the accelerator and the brake with both hands on the steering wheel in a straight (non turning) position. Suddenly, the rear end of the vehicle came out and we went into a massive spin. It ultimately caused us to crash into a median wall. I have been through many driver's courses. I have been through many skid pad trainings. I have also been through Precision Intervention Technique (PIT) training. I have been in both the receiving end of a PIT and the giving end of a PIT. The force of this spin was greater than any spin I have felt. It felt like one side or perhaps both rear wheels locked up. I have no other explanation that could cause any vehicle to just spin out of control while driving straight at 50 mph.

- El Segundo, CA, USA

The brakes had no air pressure when trying to slow down; Completely Totalled Which then caused a collision into another vehicle; The car had significant damage with inspection by Insurance adjuster and collision team; No warning lights and had been in the Porsche dealership for computer updates prior to incident.

- Nichols Hills , OK, USA

The brakes fail in wet conditions. Porsche Taycan has 2 brake systems- light braking is regenerative braking (converting mechanical energy into electricity) and for heavier braking the mechanical disc brakes take over IN THIS FAILURE SITUATION in wet conditions pressing the brake pedal does VERY LITTLE to slow the car. DURING THESE FAILURE SITUATIONS, there is 0 regenerative braking occurring. Normally if there is 0 regen braking mechanical brakes engage at 1% brake pedal press so the entirety of the brake pedal engages the mechanical brakes. DURING THIS FAILURE SITUATION, the mechanical braking system does not engage early so it does not begin to engage until near the end of the brake pedal travel. DURING THIS FAILURE EVENT, THE MECHANICAL BRAKES ARE ONLY AT MINIMAL STOPPING POWER (+/- 20%). It has been compared to the first stop after getting a car washed-?" one must -??jam on-?? their brakes in order to get their car to stop, after which it tends to stop well. Cars come from the car wash at 1-3 mph, so 10-20% braking power does not put the user in jeopardy. IN THESE FAILURE SITUATIONS THE PORSCHE TAYCAN only has 10-20% stopping power WHILE TRAVELLING -??AT SPEED-?? ON NORMAL ROADWAYS The first time this happened I was approaching a stop light in traffic. If the turn lane weren-??t empty I WOULD HAVE CRASHED into the cars ahead of me; I jerked the car into the turn lane & eventually came to a stop, with the brake pedal pressed in at 100% for the entire time. It happens at speeds from 3-50 mph It HAS been reproduced with myself in the car by Porsche service, and by other people in their cars, it was reproduced on my car AND ALL OTHER TAYCANS ON THE LOT at the dealer -?" each car did it The dealer has done -??everything in their power-?? but it is still happening. I was told Porsche NA was investigating on their wet track at their Atlanta HQ, but that the cars -??tested as designed-?? No warning messages or errors -?"the regen braking gauge always shows 0% while this happens

- Nicholasville, KY, USA

This vehicle is fully electric, and it uses regeneration while braking. With regeneration on, the braking distance is much shorter than without. The driver does NOT have any means to turn regeneration off while braking. In some instances, the first time the braking system is engaged, regeneration does not kick in, and the braking distance is unexpectedly longer than usual. This has always happened after the car was off for a while and only during the first hard braking. I captured a video of one of these instances.

- Campbell, CA, USA

The vehicle would loose braking pressure after a few minutes of driving. This occurred when the vehicle transitions from regenerative braking to standard braking. Dealer states it is a problem with the brake booster.

- Bethesda, MD, USA