The 1987 Jetta (A2 chassis) is fundamentally solid but plagued by age-related electrical gremlins, cooling system failures, and mandatory timing belt service. The diesel variants are exceptionally durable but show injection pump wear; gas models suffer more from ignition and fuel delivery issues.
Timing Belt Failure (Interference Engine Risk)
Common · high severityTypical onset: 60,000-80,000 mi intervals
Symptoms: No previous maintenance records, Engine won't start suddenly, Catastrophic valve/piston damage if belt breaks
Fix: Timing belt, tensioner, water pump, and all seals should be done together. 3-4 hours labor for gas engines, 4-5 hours for diesel due to injection pump timing. This is interference-fit — if the belt snaps, expect $1,500-3,000 in head work.
Estimated cost: $400-700 (preventive) / $2,000-4,000 (after failure)
CIS Fuel Injection Issues (Gas Models)
Common · medium severityTypical onset: 90,000-150,000 mi
Symptoms: Hard cold starts, Stumbling at idle, Rich running/black smoke, Fuel odor in cabin
Fix: CIS (K-Jetronic) fuel distributor diaphragms harden, O-rings leak, warm-up regulator fails. Fuel accumulator also common. Diagnosis takes 1-2 hours; parts are NLA from VW so expect aftermarket or junkyard sourcing. Full system overhaul runs 4-6 hours.
Estimated cost: $500-1,200
Diesel Injection Pump Wear (Diesel Models)
Occasional · high severityTypical onset: 150,000-250,000 mi
Symptoms: Loss of power, Hard starting when warm, Black smoke under load, Lumpy idle
Fix: Bosch VE or inline mechanical pumps wear internally. Rebuild kits exist but pump removal/timing/reinstall requires experienced diesel tech — 6-8 hours. Many shops won't touch these anymore. Used pump swap is common workaround.
Estimated cost: $800-1,800
Radiator and Cooling System Failures
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Overheating in traffic, Coolant puddles under car, Plastic end-tank cracks, Temperature spikes
Fix: Original radiators have plastic end tanks that crack. Thermostat housings also crack. Water pump typically done with timing belt. Full cooling refresh (radiator, hoses, thermostat, cap) takes 2-3 hours.
Estimated cost: $400-800
Electrical Gremlins (Grounds and Relays)
Common · low severitySymptoms: Intermittent gauge failures, No-start conditions, Wipers/lights cutting out, Corrosion in fuse panel
Fix: Ground straps corrode (especially engine-to-chassis). Relay panel behind dashboard fails. Multi-function relays control fuel pump, cooling fan, etc. Diagnosis is time-consuming (2-4 hours) but parts are cheap. Clean all grounds, replace suspect relays.
Estimated cost: $150-500
Shifter Bushing and Linkage Wear
Common · low severityTypical onset: 100,000+ mi
Symptoms: Sloppy shifter feel, Difficulty finding gears, Grinding into reverse, Shift lever wobbles
Fix: Plastic bushings in shift linkage disintegrate. Replacement bushings are cheap but access requires removing center console and working under car. 1-2 hours labor. Significantly improves driving experience.
Estimated cost: $100-250
Buy a diesel if you want 300k+ miles and can wrench yourself; avoid gas models unless timing belt history is documented and you're comfortable with 1980s fuel injection quirks.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.