🚗 Classic Fault — BMW (1982–1994)
E30 M3 S14 oil leak from dry sump tank
💰 Estimated Repair Cost
$20 – $200 GBP
Parts and labour estimate
🔧 Tools Required
Hose clamp tools
📋 Overview
The S14 dry sump system uses an external oil tank with hose connections that weep on older cars.
🩺 Symptoms
- Oil leak from front of engine area
- oil consumption
- dry sump tank level dropping
🔍 Possible Causes
- Cracked dry sump tank
- hardened hose connections
- loose hose clamps
🛠️ Diagnosis Steps
Inspect all dry sump hose connections and tank carefully — often easier with undertray removed
✅ Most Confirmed Fix
Hose and fitting replacement
80% of users confirm this fix worked (15 reports)
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