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 ↗2012 Porsche Cayenne powertrain problems
severe 18 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
18
Recalls
0
Avg fix
$2,500
1crash
1fire
When does it fail?
Of the 18 powertrain complaints filed for the 2012 Porsche Cayenne, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 12 model years of Porsche Cayenne we track for powertrain problems, this one carries the most owner complaints on file — 18.
No new NHTSA powertrain complaint has been filed on this vehicle in over 7 years — the issue may be aging out of the active population.
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
Transfer case problems dominate complaints about the 2012 Cayenne powertrain. Owners describe bumping, clunking, and jerking during acceleration—especially in 2nd through 4th gears—that starts early (as low as 20,000–26,000 miles) and worsens over time. The sensation is often accompanied by loss of power or temporary slipping that can escalate to complete shutdown while driving. Multiple owners hit highway merge situations where the car wouldn't accelerate smoothly, creating serious safety hazards.
Dealerships confirmed the issue is widespread and acknowledged it as a known design flaw involving water ingress through the transfer case vents. Porsche redesigned the part with vent tubes to prevent moisture buildup but has not issued a recall. Replacement runs $4,400–$6,500. The troubling part: several owners report having the transfer case replaced multiple times—some four times—within the vehicle's life. One owner paid $9,000 total across two replacements. Porsche covers repairs during warranty but refuses full cost coverage afterward, sometimes offering only partial goodwill reimbursement.
One complaint also mentions camshaft adjuster bolt failure causing complete power loss including braking and steering, though this appears isolated in the cluster.
Same Porsche Cayenne powertrain reports on nearby years: 2011 · 2013 · 2014
Failure modes owners describe
Transfer case water ingress and fluid degradation
Transfer case vents allow water to build up in the case, contaminating the fluid and causing internal wear. Porsche redesigned the case with vent tubes to prevent moisture entry. Owners report the dealer acknowledged this as a known design flaw, particularly common in 2011–2017 model years.
When: 30,000–80,000 miles typically; some failures as early as 20,000–26,000 miles
Symptoms owners cite: bumping or clunking noise during acceleration; jerking and surging sensation, especially in 2nd–4th gears; rough, stuttering acceleration on inclines and highway driving; loss of power when accelerating; slipping that can progress to total loss of drive; dangerous handling and power surges
Repairs/costs cited: Transfer case replacement cost $4,435–$6,500 retail. Redesigned parts come stocked at dealerships due to frequency of failures. New design includes vent tubes. Some owners report multiple replacements (up to 4 times) with costs totaling $9,000+. Dealership labor charges cited around $650–$4,775.
Recalls/TSBs owners mention: Porsche acknowledged the design flaw and issued corrective repair instructions with redesigned parts covered by a 2-year warranty on the new unit. However, no manufacturer recall issued. Porsche refuses full cost coverage on out-of-warranty repairs. Some goodwill partial reimbursement ($950 cited in one case) but inconsistent.
Camshaft adjuster bolt failure
Camshaft adjuster bolts failed, causing complete loss of engine power, braking system, and power steering while driving. Porsche recalled certain 2011 model year vehicles for the same defect but did not extend recall to 2012 model year despite matching part numbers.
When: Timing not specified in narrative
Symptoms owners cite: loss of engine power while driving; loss of braking system function; loss of power steering
Repairs/costs cited: Owner retained faulty parts with matching manufacturer part numbers confirming known defect. Repair cost not stated.
Recalls/TSBs owners mention: Porsche recalled some 2011 models but not 2012 for the same problem despite identical part numbers. Refused goodwill or any discount even with proof of matching defect part numbers.
Synthesized from 18 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
Transfer case failure. Care clunks/drags in low gears.
The Porsche dealer informed me the bumping noise while accelerating is the transfer case. It is a common problem on all 2012 cayenne cars. The transfer case will make the bumping noise when accelerating. It will eventually slip to the dangerous point. This is when you accelerate into traffic and the transfer case only slips and leaves the sitting in traffic unable to move. The repair is $5000…
The transfer case in this car is failing at 53,000 miles causing unsafe, jerking acceleration leading to total breakdown/shutdown if not corrected. Numerous owners experience the same issue. The manufacturer acknowledges the defect and is now providing newly designed repair parts described as permanently solving the problem and covered by a 2-year warranty at a cost in excess of $5,500 retail
Car had a skipping feeling when driving especially when turning. Vehicle has only 20,000 miles and transfer box has to be replaced. They charged me 4660.47 for the replacement claiming the five year warranty expired. The car is always garaged and used during the winter. When I complained to Porsche they sent me a check for $950.
Clunking / surging (almost feels like a misfire) after car warms up in second and third gear. Seems to be with the transfer case. Purchases car used 30 days ago and this issue started to appear after I had the vehicle and driving it for a couple of days. Now find that this is a common issue with cayennes.
2012 Porsche cayenne with 47,000 miles. Noticed jerking when turning left and some slippage in transmission. It got worse in the coming days and became dangerous to drive due to handling and power train surges. I took it to southpoint Porsche in durham, nc, this week and was told it needs a new $4,435 transfer case. A local Porsche shop directed me to reviews which note the same 'known' issue -…
The transfer case in this car is failing at 53,000 miles causing unsafe, jerking acceleration leading to total breakdown/shutdown if not corrected. Numerous owners experience the same issue. The manufacturer acknowledges the defect and is now providing newly designed repair parts described as permanently solving the problem and covered by a 2-year warranty at a cost in excess of $5,500 retail.
Had powertrain trouble with your 2012 Porsche Cayenne?
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 2012 Porsche Cayenne?
It's a meaningful issue. 18 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 13 complaints that reported odometer mileage, most powertrain failures cluster between 47,800 and 85,000 miles, with the median around 69,000. A quarter of owners report trouble before 47,800; a quarter make it past 85,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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/2012/Porsche/Cayenne.
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.