1991 Volkswagen Jetta Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1991 Volkswagen Jetta
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1991 Volkswagen Jetta ProblemsHigh Mileage Automatic Transmissions May Have Shifting Problems
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.
Electrical issues that are difficult to diagnose—and sometimes intermittent—are typically due to ground wiring issues. The most troublesome ground locations are under the battery or at the engine.