🚗 Classic Fault — Volkswagen (1974–1983)
Golf Mk1 fuel tank sender unit failure
💰 Estimated Repair Cost
$25 – $80 GBP
Parts and labour estimate
🔧 Tools Required
Multimeter, tank access tools
📋 Overview
The in-tank sender float arm corrodes and sticks, giving false fuel readings. Very common on 35+ year old cars.
🩺 Symptoms
- Fuel gauge stuck at full or empty
- gauge fluctuates erratically
- gauge reads empty with known fuel in tank
🔍 Possible Causes
- Corroded sender float arm
- worn sender resistor track
- broken sender wiring at tank connector
🛠️ Diagnosis Steps
Check sender resistance with multimeter at tank connector — should sweep smoothly from full to empty
✅ Most Confirmed Fix
Sender unit replacement
88% of users confirm this fix worked (23 reports)
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