Common issues with Jeep gas tanks vary by year and model. The 1993 to 2004 Jeep Grand Cherokees are a fire risk because of the low placement of the fuel tank at the rear of the vehicle. The 2007 and 2008 Jeep Wranglers have a fuel spit-back problem during fill-ups.
As of 2015, Chrysler hasn't officially recalled 1993 to 204 Jeep Grand Cherokees. In 2010, the National Highway Traffic Safety Administration launched an investigation to determine if the fuel tank required a recall. The plastic gas tank on these models was placed low and near the rear of the vehicle, which made it visible underneath the back bumper and vulnerable during rear-end collisions.
In 2011, Chrysler announced that it would replace the inlet check valve on fuel tanks of 2007 and 2008 Jeep Wranglers because of a fuel spit-up problem. The replacement program came after a growing number of consumers contacted the NHTSA about the problem. Chrysler told the NHTSA that a plausible cause for the spit-back problem was that the vehicles were exposed to fuel that contains more than 10 percent ethanol. Anything above 10 percent is higher than what these models were designed to handle, as valve componants swell.