Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Mazda 5 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Keyless Entry Transmitter Battery: Service and Repair
TRANSMITTER BATTERY REPLACEMENT
1. Insert a small flathead screwdriver into the transmitter notch and remove the key from the transmitter by pressing the tab.
2. Insert a small flathead screwdriver into the transmitter notch and the transmitter.
3. Remove the battery.
4. Install the new battery (CR1620) with the positive pole facing down.
5. Align the upper and lower cover and close the transmitter.
Used battery
Lithium battery CR1620
Battery life
Approx.2 years (when used 10 times/day)
6. Install the key to the transmitter.
1. Insert a small flathead screwdriver into the transmitter notch and remove the key from the transmitter by pressing the tab.
2. Insert a small flathead screwdriver into the transmitter notch and the transmitter.
3. Remove the battery.
4. Install the new battery (CR1620) with the positive pole facing down.
5. Align the upper and lower cover and close the transmitter.
Used battery
Lithium battery CR1620
Battery life
Approx.2 years (when used 10 times/day)
6. Install the key to the transmitter.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.