Service bulletins for the 1990 Jeep Wrangler
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
12 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: EGR valve are shown. Show all
| RCL647 | 1996-04-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). APPLIES TO VEHICLES EQUIPPED WITH A 4.2L ENGINE AND FEDERAL HIGH ALTITUDE EMISSION CONTROL SYSTEM. FUEL VAPORS MAY CAUSE DETERIORATION OF THE PCV HARNESS ASSEMBLY. THE PCV HARNESS ASSEMBLY MUST BE REPLACED AND THE ENGINE IDLE SPEEDS MUST BE RESET. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.