Parts information for parts withdrawal involving the transmission oil. Part number 00004321012 is affected - the vehicles that use this part number should be included.
full bulletin at NHTSA ↗2021 Porsche Taycan powertrain problems
moderate 11 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
11
Recalls
0
Avg fix
$2,500
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Parts information for parts withdrawal involving the transmission oil. The vehicles affected are ones that use the part number 00004330563
full bulletin at NHTSA ↗Parts information for parts withdrawal involving the transmission fluid. Part number 00004321048. The cars affected are ones that use the part number listed.
full bulletin at NHTSA ↗Parts information for parts withdrawal involving the (00004321048) Transmission fluid. The vehicles affected are ones that use the part number mentioned.
full bulletin at NHTSA ↗Parts information for parts withdrawal involving the 7 speed dual clutch gear box. Part numbers 0BG300047 and 0BG300047X are affected. Cars that are involved are ones that use the part numbers mentioned.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2021 Taycans describe a cluster of powertrain failures centering on sudden loss of propulsion. The most critical: vehicles shut down completely while driving—on highways at 50–60 mph, on residential streets, and with passengers aboard. Owners report receiving "Engine Control Error" or "Electrical System Error" messages; the car stops responding to the accelerator pedal and coasts to a stop. One owner had to run across a highway with their daughter to escape oncoming traffic. Another was left stranded in the middle of an interstate with no shoulder.
Some cars also refuse to enter drive or reverse, or cannot be put in park, trapping the driver. Others show extreme sluggishness when accelerating with no warning lights—one owner reported four separate episodes and barely made it home on the fourth.
Dealers have replaced rear control units, AC-to-DC power converters, shifter motors, and in at least one case an entire transmission shipped from Germany. The problem persists in some cars even after service. One vehicle sat at a dealership for 37 days while technicians tried multiple fixes. Another owner brought the car in four times for the same acceleration issue, only to have it recur. Owners uniformly describe these as serious safety hazards that could result in high-speed collisions.
Same Porsche Taycan powertrain reports on nearby years: 2020 · 2022
Failure modes owners describe
Sudden loss of propulsion / complete power loss while driving
Vehicle experiences abrupt shutdown of motor/traction inverter or complete loss of drive response while in motion. Car stops responding to accelerator input and coasts to a stop. Sometimes the vehicle goes into park mode involuntarily and cannot be driven. Owners report the car shuts down completely on the highway, in traffic, and on residential roads with no safe place to pull over in some cases.
When: Occurs at 50–60 mph on highways and lower speeds on residential roads; happens early in ownership (2 miles, 250 miles, 6 months) and repeatedly throughout vehicle life
Symptoms owners cite: Vehicle will not accelerate when pedal is pressed; Car coasts to a stop with no braking response; Traction inverter vibrates aggressively before shutdown; Vehicle becomes unresponsive to gas/drive pedal; Car shuts down completely while driving; Loss of forward motion in middle of roadway
Codes mentioned: Engine Control Error, Electrical System Error
Repairs/costs cited: Dealers have replaced rear control unit (not immediately available per owner #4), power converter (AC-to-DC), shifter motor from Germany, and entire transmission shipped from Germany. In some cases repeated attempts to fix the issue have failed, and the problem recurs after dealer service.
Recalls/TSBs owners mention: Porsche North America has stated this is a service issue and not a safety issue (owner #3 disputes this). Some owners report being told to be patient while Porsche investigates. No recall mentioned in narratives.
Electrical system faults preventing vehicle operation
Vehicle displays electrical system error messages that prevent the car from entering drive or reverse gears. In some cases the car cannot be started or put into park. Owners report these errors appearing with no prior warning.
When: As early as 2 weeks of ownership with under 750 miles; recurs at startup and intermittently during driving
Symptoms owners cite: Electrical System Error message appears; Vehicle cannot enter reverse or drive gear; Vehicle cannot be put in park; Unable to start vehicle; Red warning light and beeping; Low 12V battery message
Codes mentioned: Electrical System Error, Engine Control Error
Repairs/costs cited: Porsche service centers have replaced shifter motor (from Germany) and power converter (AC-to-DC). In one case (owner #2) a new transmission from Germany was being shipped as a replacement after 37+ days of repair attempts. Owner #1 reported the error cleared after 90 minutes when the car turned itself off and back on.
Recalls/TSBs owners mention: Owner #5 states Porsche has experienced these problems for 12+ months but has not resolved or acknowledged the issue publicly.
Sluggish or no acceleration response
Owners report the vehicle has four or more episodes of refusing to accelerate when the pedal is pressed, or responding with very sluggish power delivery. In one case the vehicle barely made it home on a residential street and the condition continued for over 10 minutes with no warning lights.
When: Late October 2022 in one reported case; recurs multiple times throughout vehicle ownership
Symptoms owners cite: Acceleration pedal not responding; Very sluggish acceleration; Barely able to make it home; No error or warning messages on dash; Power loss condition lasts 10+ minutes
Repairs/costs cited: Owner #4 brought car to Porsche Irvine on November 2 (year not specified) for service; dealers identified rear control unit as the problem, but part was not available and car remained in service for at least 30 days.
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Vehicle LOST PROPULSION while driving on the road. The motor (traction inverter) abruptly started to vibrate very aggressively, then the error warning "ENGINE CONTROL ERROR" flashed on the cluster display. The car immediately stopped responding to the gas/drive pedal and quickly coasted to a stop. After a full power-off then back on, the car woke back up like normal - as if nothing had…
Spontaneous shutdown of the vehicle while driving. Critical failure of motility while driving. Driving at 50km per hour extremely dangerous as car just shutdown and I had to try to roll off the road but it died so I had to put it in neutral and push it by hand on a busy road. Car has been at the dealer for 3 weeks now. The spontaneous shut occurred and a red light came on.
There have been four total episodes when the car would not accelerate when the acceleration pedal was pressed. The last time it happened (late October 2022) the acceleration was very sluggish and I barely made it home. This happened on a residential street, and continued for 10+ minutes. If this power loss occurred on a highway, it could have lead to a very dangerous situation. There were no…
The car experiences issue, after issue, including but not limited to collision alert warning not functioning, lane change assist failure, and the alarm sounding (disturbing the peace). As Porsche fixes the issues one by one, other matters emerge. The latest is the antania, and communications.
Had powertrain trouble with your 2021 Porsche Taycan?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2021 Porsche Taycan?
It's a documented issue but not catastrophic. 11 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2021/Porsche/Taycan.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.