Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2003 Porsche Cayenne goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 14 MPG, a full 26.2-gallon tank covers about 367 miles.
Gauge
Gallons
Highway miles
City miles
Full
26.2
445
314
3/4
19.7
334
236
1/2
13.1
223
157
1/4
6.6
111
79
1/8
3.3
56
39
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 1,071 gallons, roughly 41 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
Other 2003 SUVs of a similar size, one model per brand.
2003 Porsche Cayenne fuel system recalls
NHTSA lists 2 fuel-system recalls for the 2003 Porsche Cayenne, out of 9 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Delivery · Fuel pumpSep 20, 2017 · NHTSA 17V576000 · Porsche Cars North America, Inc. · 50,145 vehicles
Porsche Cars North America, Inc. (Porsche) is recalling certain 2003-2006 Cayenne S and Cayenne Turbo vehicles, 2004-2006 Cayenne vehicles, and 2006 Cayenne S "Titanium" Edition vehicles. These gasoline-powered vehicles have a fuel pump flange that may crack, allowing fuel to leak.
Risk and remedy
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Remedy: Porsche will notify owners, and dealers will replace the fuel filter flanges with new filter flanges that have a protective film, free of charge. The recall began July 6, 2018. Owners may contact Porsche customer service at 1-800-767-7243. Porsche's number for this recall is AH10.
Storage · Tank assembly · Filler pipe and capFeb 18, 2004 · NHTSA 04V068000 · Porsche Cars North America, Inc. · 35 vehicles
On certain sport utility vehicles, if the ground connection between the spiral ring of the tank filler neck and the connecting pipe to the fuel tank is inadequate, the flow of fuel during refueling can create an electrostatic charge, which could discharge and spark. This spark could ignite fuel vapors in the area outside the tank filler neck that could lead to a muffled detonation.
Risk and remedy
Risk: Due to such a startling event, the individual refueling the vehicle could remove the fuel nozzle at precisely the moment of the detonation without first stopping the fueling process. In such a circumstance, fuel escaping outside of the fuel tank may ignite, resulting in a fire.
Remedy: Dealers will inspect the ground connection and, if necessary, corrected. Owner notification began on march 29, 2004. Owners should contact porsche at 1-800-545-8039.
What is the fuel tank capacity of the 2003 Porsche Cayenne?
The 2003 Porsche Cayenne holds 26.2 gallons (99 liters) on every trim we list.
How many gallons and liters does the 2003 Porsche Cayenne gas tank hold?
The 2003 Porsche Cayenne tank holds 99 liters, or 26.2 gallons in US gallons.
How far can a 2003 Porsche Cayenne go on a full tank?
About 445 miles on the highway and 314 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2003 Porsche Cayenne go on a quarter tank?
About 111 highway miles or 79 in town from the 26.2-gallon tank, which has roughly 6.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2003 Porsche Cayenne take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2003 Porsche Cayenne?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 26.2-gallon tank from empty costs $138.34. It ranges from $119.73 in the Gulf Coast to $166.63 in California.
How much does a full tank of gas weigh in a 2003 Porsche Cayenne?
About 162 pounds for the 26.2-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2003 Porsche Cayenne have a bigger gas tank than the Land Rover Discovery?
Yes. The 2003 Porsche Cayenne holds up to 26.2 gallons; the 2003 Land Rover Discovery holds up to 24.6.
Has the 2003 Porsche Cayenne had a fuel pump or fuel system recall?
Yes. NHTSA lists 2 fuel-system recalls for the 2003 Porsche Cayenne: 17V576000 (delivery · fuel pump); 04V068000 (storage · tank assembly · filler pipe and cap). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
Sources
Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).