Mazda RX-8 Apex Seal Failure — Low Compression
Toyota
Corolla
2003
13B-MSP Renesis
⚡ Quick Summary
Severity Level
High
Safe to Drive?
🚫 Do NOT Drive
Safety Impact
Direct safety risk — affects safe operation of the vehicle
Urgency Level
🟠 Fix Soon
Apex seal wear on RX-8 is the most common high-mileage failure. Symptoms: reduced power, white smoke, poor cold starting. Compression test confirms seal wear — should be 8+ bar on each rotor face. Engine rebuild or replacement costs £2,000-5,000.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Toyota Corolla 2003 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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