Parts information for parts withdrawal involving the (976809858) Fuel filler flap module. The vehicles affected are ones that use the part number mentioned.
full bulletin at NHTSA ↗2005 Porsche Cayenne engine problems
moderate 11 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
11
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 11 engine complaints filed for the 2005 Porsche Cayenne, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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
Among the 8 model years of Porsche Cayenne in our records for engine problems, this one ranks #3 by owner-complaint volume.
Engine accounts for 26% of all owner complaints filed against this vehicle, across 5 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine 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. Part number 00004321012 is affected - the vehicles that use this part number should be included.
full bulletin at NHTSA ↗Parts information for Parts Withdrawal - Oil Pressure Sender. The vehicles affected are ones that use the part number PAB906060.
full bulletin at NHTSA ↗Parts information for parts withdrawal involving various parts. The vehicles affected are ones that use the part numbers mentioned. Part numbers: 0PD145703E, 0PD145703H, 0PD907123G, 0PD907123K
full bulletin at NHTSA ↗Parts information for parts withdrawal involving the transmission oil. The vehicles affected are ones that use the part number 00004330563
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The plastic coolant tubes that run between the engine's front and rear sections fail repeatedly in 2005 Cayennes—consistently reported between 60,000 and 75,000 miles. The tubes rupture, spill all the coolant, and leave the truck stranded; repair runs $2,800 to $3,000 for parts and labor. Porsche acknowledged the problem widely enough to stock replacement parts at dealerships and eventually redesigned the component in aluminum, but refuses warranty coverage on out-of-spec vehicles.
Owners also report troubling drivability issues: sudden hesitation during highway acceleration and passing, one incident at 65 mph on the NJ Turnpike caused near-collisions with tractor-trailers. Some describe the engine losing power and stalling at highway speed with the steering wheel locking. One owner had check engine light and misfire, another heard loud engine noise paired with forward lunging and hard shifting. Several dealer visits turned up ignition coil problems or misfires at specific cylinders, but repairs sometimes failed to stick—one owner reports the problem recurring immediately after the dealer finished.
Complicating diagnosis: check engine lights appeared with no readable fault codes on the computer, preventing the dealer from pinpointing anything.
Same Porsche Cayenne engine reports on nearby years: 2008
Failure modes owners describe
Plastic coolant tube/radiator pipe failure
Plastic coolant tubes and radiator pipes fracture and rupture, dumping coolant and disabling the engine. Porsche redesigned the part from plastic to aluminum and issued recalls for 2003–2006 Cayennes. Repair requires replacement with metal lines.
When: 60,000–75,000 miles
Symptoms owners cite: coolant leak; engine overheating; vehicle disabled; requires towing
Repairs/costs cited: $2,800–$3,000+ for parts and labor; plastic tubes replaced with metal/aluminum lines
Recalls/TSBs owners mention: Recall issued; plastic part redesigned to aluminum; Porsche denies warranty coverage out-of-warranty
Engine hesitation and loss of power under acceleration
Vehicle hesitates or loses engine power during acceleration, particularly at highway speeds and during passing maneuvers. Three owners report incidents while crossing divided highways; one reports sudden power loss at 65 mph on NJ Turnpike.
When: Various; one at 65 mph highway driving
Symptoms owners cite: hesitation during acceleration; sudden loss of engine power; difficult gear shifting; engine lunging
Repairs/costs cited: Dealer replaced ignition coils; one owner reports failure recurred immediately after repair
Engine misfire and ignition coil failure
Engine misfires with check engine light illumination. Owners report loud engine noise, forward lunging, and difficult shifting. Dealers attribute failures to ignition coil and cylinder problems.
When: 47,000–66,000 miles
Symptoms owners cite: check engine light; engine misfire; loud engine noise; forward lunging; difficult shifting
Repairs/costs cited: Ignition coil and cylinder components replaced; failure recurred after one repair
Unexplained engine stalling and steering lock at highway speed
Engine stalls suddenly at highway speed (70 mph), accompanied by steering wheel lock. Dealer reports crack in engine but cannot diagnose root cause. Another owner reports repeated engine slowdown and stalling at 65 mph with steering wheel locking.
When: 65–70 mph highway driving
Symptoms owners cite: engine stall; steering wheel lock; unexplained power loss; no diagnostic codes
Repairs/costs cited: Dealer identified crack in engine; unable to diagnose in other case
Recalls/TSBs owners mention: Manufacturer did not offer assistance
Check engine light with no diagnostic codes
Check engine light illuminates with no fault codes showing on vehicle computer, preventing diagnosis and repair.
When: Multiple occasions reported
Symptoms owners cite: check engine light; no diagnostic codes present
Repairs/costs cited: No repair possible without codes; dealer unable to diagnose
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
1) the visit workshop light appeared on my new 2005 Porsche 911 carrera s. 2) on november 30, 2004 the vehicle was running fine with the workshop light on. The vehicle then suddenly lost engine power at 65 MPH durring acceleration on the nj turnpike. The loss of engine power caused several tractor-trailers to nearly colide with my vehicle, and with others, while I proceeded twords the sholder…
I was driving a Porsche cayenne s today on highway at 65mph. The car unexpectedly slowed down by around 20 miles for about 10 seconds. 5 minutes later, same problem occurred again and then the engine stalled, and the steering wheel locked. It is very dangerous to stall on highway, without too much control on steering wheel. The dealer said they could not find the problem. *tr
Tl* the contact owns a 2005 Porsche cayenne s. The contact stated that the radiator pipe was fractured, causing anti freeze to leak from the vehicle. The vehicle was towed to the dealer where the original hose lines were replaced with metal lines due to corrosion. The manufacturer was made aware of the failure however, did not offer any assistance. The current mileage was 75,000 and the…
Consumer request for Porsche cars of north america to repurchase his 2005 Porsche cayenne.***no answer required***. *mr the consumer has experienced numerous mechanical problems with his vehicle such as engine stalling, a replacement air bag module, battery failure, fuel tank sender calibration. *jb
Coolant pipe failure. *tr
Had engine trouble with your 2005 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 engine problem on the 2005 Porsche Cayenne?
It's a documented issue but not catastrophic. 11 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 10 complaints that reported odometer mileage, most engine failures cluster between 14,561 and 74,800 miles, with the median around 61,000. A quarter of owners report trouble before 14,561; a quarter make it past 74,800. 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2005/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.