Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Saturn Ion owners, lightly cleaned up (personal details are redacted by NHTSA).
Fuel line leak. I own a 2003 Saturn Ion 3, with 120,481 miles on it. The car was garage kept till the past 6 months. When driving on 4/15/18, the car suddenly developed a strong fuel smell. The vehicle was brought into the repair shop on 4/16/18. The vehicle was diagnosed with a leaking, rusted fuel line. The leak was from line coming out of fuel pump. My research shows this was a known and common for the Saturn Ion, also seems that GM is aware of the issue. Fuel line/s should not rust through like this. This car is well maintained, inspected regularly at every 3000 mile oil change intervals. The vehicle was mainted by Saturn as long as they were in business. This is a safety related defect that should be investigated and a recall campaign started and I should be reimbursed for the repair.
Fuel system - fuel line rusted out under carriage - just in front of left rear tire. Causing gasoline to leak out thru hole in fuel line while engine is running. Entire fuel line must be replaced , cannot just replace section rusted causing hole for fuel to leak out. The cost for this repair is in excess of $600 ( parts & labor). This problem has been reported happening to numerous other vehicle owners, with no solution issued by GM; nor reimbursement to owners.
Tl* the contact owns a 2003 Saturn Ion. The contact stated that the vehicle failed to start and fuel was leaking from the rear driver side of the vehicle. The failure recurred several times. The vehicle was not diagnosed or repaired. The contact was made aware of NHTSA campaign number: 04V003000 (fuel system, gasoline); however, the VIN was not included. The manufacturer was notified of the failure. The approximate failure mileage was 201,000.
Tl* the contact owns a 2003 Saturn Ion. The contact stated that the vehicle had an abnormal odor and was leaking fuel from underneath. The vehicle was not taken to the dealer or independent mechanic to be diagnosed or repaired. The contact referenced NHTSA campaign number: 04V003000 (fuel system, gasoline) however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was 103,000.
Takata recall the seat belts when stopping suddenly do not always lock up. This is very dangerous especially with kids. The fuel system has been producing a check engine light at certain times of fueling up. And the fuel pump will knock occasionally even after it's been changed. The suspension is really bad and dangerous, rattling noise and shaking.
Ran out of gas. Inspection indicates that fuel is leaking from rusted fuel line in front of left (driver's side) rear tire. Further inspection shows heavy/extensive rust on the fuel lines along the entire length of the undercarriage. Problem appears identical to another incident previously reported as #10668929.
Fuel line rotted so much that one day I start my car and every drop of gas I had poured out onto the ground under my drivers seat. It was a fire hazard and now I am stuck without a car. The garage wants over $600 to replace the fuel line and I literally have no way to fix it. The vehicle was on a city street.
Tl* the contact owns a 2003 Saturn Ion. The contact stated that the odor of fuel was present outside the vehicle. The cause of the failure was not diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The VIN was invalid. The failure mileage was 152,000.
Tl* the contact owns a 2003 Saturn Ion. When the contact started the vehicle, he smelled fuel and noticed a significant amount of fuel on the ground. The manufacturer stated there were no recalls available. The vehicle was not diagnosed. The failure mileage was 130,000.
Fuel line to throttle body leaked fuel due to stress cracks. Part that failed is " no longer available" according to GM parts sales. .mechanic welded cracked pipe and said eh has fixed quite a few of these. I have receipt from repair shop
Related recalls
Fuel system, gasoline
Certain passenger vehicles equipped with 2.2l 4-cylinder (l61) engines were built with a fuel filter that could corrode prematurely on the exterior surface.
Remedy: Dealers will replace the fuel filter assembly. Owner notification began on December 30, 2003. Owners should contact Saturn at 1-800-972-8876.
Fuel System complaints in other Ion years
Frequently asked questions
How common are fuel system problems on the 2003 Saturn Ion?
NHTSA has 34 complaints about the fuel & propulsion system of the 2003 Saturn Ion, 4% of the model year's 758 complaints. The component named most often is delivery › fuel pump (2 mentions).
Is there a recall for 2003 Saturn Ion fuel system problems?
Yes — NHTSA recall 04V-003 (fuel system, gasoline, Jan 5, 2004). Recall repairs are free at authorized dealers.
At what mileage do 2003 Saturn Ion fuel system problems start?
Half of the complaints with a recorded mileage happened before about 105,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to fuel & propulsion system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.