Infiniti G37 2009-2013 Electrical Specifications

The 2009-2013 Infiniti G37 features a 12-volt electrical system with a 70-amp alternator and a 12-volt battery. The system supports advanced features like keyless entry, push-button start, and a premium Bose audio system. It is compatible with most standard automotive electrical components, but aftermarket modifications should be checked for compatibility with the vehicle's CAN bus system.

Regular maintenance includes checking the battery terminals for corrosion, ensuring the alternator is functioning properly, and inspecting wiring for wear or damage. The battery should be tested annually, and the charging system should be checked every 30,000 miles. Fuses and relays should also be inspected periodically to ensure proper electrical function.

To replace the battery, first, disconnect the negative terminal followed by the positive terminal. Remove the battery hold-down clamp and carefully lift the battery out. Install the new battery, secure it with the clamp, and reconnect the terminals, starting with the positive terminal. Ensure all connections are tight and free of corrosion.

Start by checking the battery voltage with a multimeter. If the voltage is low, recharge or replace the battery. Inspect fuses and relays for any blown components. If issues persist, use a diagnostic scanner to check for error codes in the vehicle's computer system. Common issues include faulty alternators, bad grounds, or damaged wiring.

To optimize performance, ensure the battery is fully charged and terminals are clean. Use high-quality fuses and relays, and avoid overloading the system with aftermarket accessories. Regularly inspect wiring for damage and ensure the alternator is functioning at peak efficiency. Consider upgrading to a high-output alternator if adding power-hungry components.