As a mechanic and proud owner of multiple Range Rover models, I know a thing or two about the reliability of these SUVs.
And yes, I do mean that with a hint of sarcasm. Despite their luxurious appeal, Range Rovers are known for having their fair share of issues.
One important component that often needs replacement is the auxiliary battery. So, when should it be replaced?
When to replace
In general, the auxiliary battery of a Range Rover should be replaced every three to four years.
However, this can vary based on usage, climate, and maintenance. Keep an eye out for any signs that it may be time for a replacement.
Signs and symptoms it’s time for a replacement
There are several signs and symptoms that indicate the auxiliary battery in your Range Rover should be replaced:
- The key fob isn’t working, or it’s working sporadically.
- The engine is slow to start, or it doesn’t start at all.
- The battery warning light is illuminated on the dashboard, indicating low voltage.
- The heating and cooling systems are not working properly.
If you experience any of these issues, it’s time to get your auxiliary battery checked out.
List of related OBD codes
Here are some related OBD codes that may indicate an issue with your auxiliary battery:
- P0562 – System Voltage Low
- P1600 – Battery Backup Circuit Malfunction
- P1601 – Battery Backup Circuit Range/Performance
- P1602 – Battery Backup Circuit Intermittent/Erratic
If your Range Rover displays any of these OBD codes, it may be time to replace the auxiliary battery.
What can happen if not replaced
If you neglect to replace your Range Rover’s auxiliary battery, you run the risk of experiencing the following issues:
- Inconsistent performance of engine components, such as the alternator, starter motor, and fuel pump.
- Immobilization of the vehicle due to a dead battery.
- Harmful effects on electronic components, including the radio, navigation system, and other entertainment features.
In short, not replacing the auxiliary battery can lead to poor vehicle performance and a dead battery, leaving you stranded.
Can it be replaced without a mechanic?
Yes, it is possible to replace the auxiliary battery in your Range Rover without consulting a mechanic.
However, it’s essential to have a basic understanding of the battery replacement process before getting started.
Parts you’ll need to replace it
You will need the following parts to replace your Range Rover’s auxiliary battery:
- A new auxiliary battery
- A battery hold-down clamp
- Optional: Battery terminal grease or protector
Tools you’ll need to replace it
You will need the following tools to replace your Range Rover’s auxiliary battery:
- A socket wrench and socket set
- A battery terminal cleaner
- A battery tester/multimeter
- Safety glasses and rubber gloves (to protect yourself from battery acid)
- Optional: A torque wrench (to tighten the battery hold-down clamp)
How to replace it
Here is a detailed step-by-step guide to replacing your Range Rover’s auxiliary battery:
- Turn off the engine and remove the key from the ignition.
- Open the hood of your Range Rover and disconnect the negative (-) cable from the battery terminal.
- Disconnect the positive (+) cable from the battery terminal.
- Loosen the nut on the battery hold-down clamp with a socket wrench until the clamp can be moved.
- Remove the battery hold-down clamp and remove the old auxiliary battery.
- Clean the battery tray and terminals with a battery terminal cleaner.
- Test the new auxiliary battery with a battery tester/multi-meter.
- Place the new battery in the battery tray and secure it with the battery hold-down clamp.
- Tighten the nut on the battery hold-down clamp with a socket wrench. Optional: Use a torque wrench for accuracy.
- Reconnect the positive (+) cable to the battery terminal.
- Reconnect the negative (-) cable to the battery terminal.
Congratulations, your new auxiliary battery is installed!
How long do auxiliary batteries typically last in Range Rovers?
Auxiliary batteries in Range Rovers typically last three to four years, depending on usage, climate, and maintenance.
What are the symptoms of a failing auxiliary battery in a Range Rover?
Symptoms of a failing auxiliary battery include issues with the key fob, slow or no starting of the engine, the battery warning light illuminated on the dashboard, and improper heating and cooling system performance.
Is it possible to replace the auxiliary battery in a Range Rover without a mechanic’s assistance?
Yes, it’s possible to replace the auxiliary battery in a Range Rover without a mechanic’s assistance, but it’s crucial to have a basic understanding of the battery replacement process beforehand.
Last updated and verified on 4th September 2023