Land Rover Defender L663 Mild Hybrid 48V Battery Fault
Land Rover
Range Rover
2020
3.0 D250/D300 MHEV
⚡ 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 48V mild hybrid battery in Defender L663 MHEV can develop cell faults triggering mild hybrid system warnings and disabling the MHEV fuel-saving functions. Software update resolves most cases. Battery replacement costs £800-1,800.
Onarım / Çözüm
No confirmed fixes yet. Share yours below.
⚠️ Yanlış Teşhis mi?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Land Rover Range Rover 2020 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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