Summary
The Jeep YJ has 11 recalls covering the 1987-1991 production run, with the most serious being a 1991 manual-transmission defect where salt corrosion bridging wiring in the bulkhead connector can cause the starter to engage on its own, moving a parked vehicle in gear without the key being turned.
The 1990 manual-transmission models have a parking brake that can self-release without warning and allow the vehicle to roll away. Going back to 1989, the fuel tank skid plate was built without a flange designed to limit forward movement of the rear frame crossmember in a rear impact, leaving the fuel system vulnerable to crash damage. The 1989 model also has an emissions concern where carbon monoxide output can exceed allowable levels.
The 1987 model year carries several of its own issues. The front brake hoses can contact the wheel opening splash shields, wear through over time, and leak fluid from half the hydraulic system, stretching stopping distances. On the fuel side, a cracked sending unit gasket on plastic-tank 1987 models can leak fuel vapor and, near an ignition source, start a fire. Pre-sale 1987 models also left the factory with improperly tightened wheel lug nuts and intermediate steering shaft clamp bolts, either of which can cause loss of steering control. The wiper pivot mounting points on 1987 models can crack at the sheet metal, binding the wiper linkage and leaving the driver without wipers in the rain. Cruise control on 1987 models can hunt above and below the set speed rather than holding steady, which creates unpredictable speed changes on the highway.
The 1988 model year with the 4.2L engine has a defective positive crankcase ventilation harness causing excess emissions. The 1991 model also has a tire and rim labeling compliance issue.
