| 1 | 0 | 3 | 4 | 3 | 4 |
2004 Porsche Cayenne repairs by problem area
Engine (34%)
Transmission and Drivetrain (17%)
Brakes and Traction Control (6%)
Suspension and Steering (11%)
Electrical and Air Conditioning (15%)
Paint, Rust, Leaks, Rattles, and Trim (8%)
Other (9%)
Chart based on 142 repairs.
2004 Porsche Cayenne engine repair cost distribution
$2500+ (14%)
$1000 - $2499 (19%)
$500 - $999 (19%)
$100 - $499 (29%)
< $100 (19%)
Chart based on 42 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2004 Porsche Cayenne 4dr SUV
turbocharged 450hp 4.5L V8 6-speed shiftable automatic AWD w/low range
| 80260 mi €4000 |
Two turbos changed due to cracking in one of them starting to leak oil |
| 115940 mi €2000 |
Replaced plastic connectors for the fuel injectors. New battery |
| 56400 mi US $2200 |
replaced all engine coolant tubes |
| 60400 mi US $180 |
replaced all 8 pencil ignition coils myself. No labor cost, just parts. All 8 were cracked. |
| 96000 mi US $125 |
CEL on for small vacuum leak (P0456) in emissions system. Replaced gas cap. |
| 101000 mi US $300 |
lubed gas cap and CEL stayed off since July. |
| 114000 mi US $385 |
fuel tank purge valve and oil mist separator had vacuum leaks |
| 119000 mi US $415 |
large vacuum leak causing CEL to stay on. Gas mileage dropped from 18 mpg to 14 mpg. Replaced the gas tank vent (purge) valve assembly on the front of the engine. |
| 131800 mi US $3000 |
replaced water pump and 2 radiator hoses. Cost $800 |
| 133000 mi US $225 |
replaced check valve on evap emission system |
| 132000 mi US $700 |
Intermittent engine power shutdown at less then half a tank of fuel and at highway speed. Remove and replace both fuel pumps and flange units. No more problems. |
| 100000 mi US $200 |
Bad coil |
| 102500 mi US $750 |
Leaking cooling fluid reservoir. |
| 113000 mi US $1400 |
Coolant "T"s on back of engine exploded. Also needed several vent/breather tubes during replacement process. Issue is specific to Turbo models and occurred despite metal coolant pipe upgrade already being installed. |
| 68000 mi US $800 |
Emissions. Replaced two O2 sensors (before cat) and the computer would still not reset. Still shows O2 fault. Won't pass California Smog. |
| 73000 mi US $600 |
Plastic coolant pipes replaced with aluminum due to leak in plastic pipes. |
| 101000 mi US $3000 |
One turbo oil line replaced. |
| 107000 mi | Air Pump failure repair Secondary air pump not working, replaced fuse. |
| 152200 mi US $800 |
Water pump replacement. At the same time did thermostat and cooling lines. Valve cover gaskets had gone brittle and were leaking. |
| 181000 mi US $340 |
Fuel Line replaced |
| 113000 mi US $2000 |
Engine cooling supply lines running down the valleys of the engine block to the heater. The plastic injection molded parts of the assembly failed. Poor application for plastic given the intense heat and pressure. Porsche changed this for the '08. |
2004 Porsche Cayenne 4dr SUV
340-horsepower 4.5L V8 6-speed shiftable automatic AWD w/low range
| 70800 mi US $700 |
Cooling tubes leaking/replaced Water pump failed/replaced |
| 76660 mi C $400 |
Repair valve cover gaskets and another o ring on camshaft to stop small oil leaks. |
| 79140 mi | Replaced one ignition coil. |
| 93620 mi C $90 |
Replaced expansion tank on cooling system. |
| 94240 mi C $78 |
I set out to change the coolant pipes on the 2004 Porsche Cayenne's engine, only to discover that they had already been done. While I had it apart I changed the spark plugs (two of which had visible fouling) and coils, but discovered the eBay set of eight coils (I had used one to date) only had three more which worked, so still using four of the original, cracked coils, but they work fine, after much fussing with error codes. Total cost of this repair, $78.00 CDN for the plugs. From this my advice would be to go upscale in purchasing coils for a Cayenne. They are a pain to change because of the plastic covers, fragile vent hoses, and the engine mount which must be removed for access to #3. As well, one misfiring cylinder causes the entire bank to shut down because the ECU senses a risk to the O2 sensor and puts four cylinders into limp mode. |
| 97020 mi | 2004 Cayenne S started to miss badly while 50 miles from home, but finally it showed a code. Cylinder 2. I changed the coil from new Chinese ones I had on hand. The spark plug required re-torquing, strangely. This improved performance after a month of intermittent misfiring. Lesson: Don't buy bargain coils for this car. |
| 106000 mi | cooling tubes repaired |
| 105000 mi US $2300 |
Original equipment plastic crossover coolant pipes cracked. Replaced with aluminum pipes. Also, ignition coils all replaced. |
| 87000 mi US $1384 |
The primary fuel pump was replaced because the car was losing power and not running properly Water pump replaced due to excessive noise - dealer felt that failure was impending |
| 122000 mi US $255 |
Engine torque arm replaced due to split busing noticed by dealer during 120,000 mile routine maintenance. |
| 58000 mi US $150 |
camshaft sensor bank 2 |
| 82000 mi US $662 |
catastrophic engine failure, cracked cylinder (#3) piston seized, connecting rod smashed piston into valves, connecting rod continued to smash piston into pieces. Vehicle not repaired yet, Porsche NA contacted for engine replacement... |
| 59100 mi | Replaced leaking water pump because adding coolant weekly. Also replaced coolant tubes as preventive maintenance. Rough engine when accelerating, cleaned injectors. |
| 48980 mi | Engine has scuffed cylinder and cracked coil packs. Estimated cost to replace engine now $27,000, so car has been sold as is. |
| 76000 mi US $2200 |
Plastic water intake broke and need to be replaced. Part $800.00 for the kit and $2,000.00 labor with $300.00 discount. |
| 83080 mi ¤2800 |
Fuel vent valve replaced, 150 AED |
| 83700 mi | key did not come out start switch! Modified start switch so key will never being locked again! |
| 108500 mi ¤3000 |
After replacing spark plugs, car did not accelerate anymore. Damaged ignition coils! Replaced all 8 coils => OK now. (old model: 938-602-104-05 => new 948-602-104-20) |
| 112200 mi ¤932 |
Secondary vacuum pump replaced PN: 95560510511. |
| 114080 mi ¤5500 |
No fuel supply to ignition Replaced fuel filter + fuel pump Done in Muscat (Porsche Center Oman) Thanks to Mr. Francis |
| 118000 mi | At 118K well-maintained miles developed bad knock. Dealer assessed scorched cylinder, apparently common. Quote for full rebuild $18K. Decided to junk it. Overrated Porsche - never again. My wife's Accord is @ 240K and going strong. |
2004 Porsche Cayenne 4dr SUV
247-horsepower 3.2L V6 6-speed shiftable automatic AWD w/low range
| 102000 mi US $1000 |
Replaced faulty plugs and coils on all cylinders. Apparently all were original, never having been replaced before. |
| 103000 mi | Left radiator fan running continuously due to control module failure. Replaced fan/module assembly. |
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See TrueDelta's information for all Porsche models.
