Audi A4 B9 45 TFSI g-tron CNG System Maintenance
Audi
A4
2018
2.0 TFSI g-tron CNG
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟡 Monitor Closely
The factory CNG system on A4 B9 g-tron requires injector service every 60,000 km and pressure regulator inspection every 80,000 km. CNG injector replacement costs £80-200 each.
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 Audi A4 2018 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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