2023-2026 Lexus RX 350 Battery Replacement Made EASY!, by Eroad Car Battery Replacement on YouTube. 4 min 42 s.
- Video length
- 4 min 42 s
- Time to do it
- 20 minutes
- Difficulty
- Easy
- Steps
- 10
What you need
Steps
Park on level ground, switch off the ignition and let the car sit for a few minutes. Put on safety glasses and gloves, and take off rings or watches before you touch the battery.
Check the group size your trim needs, then set out a 10mm socket or wrench, 10mm and 12mm sockets with an extension, and the new AGM battery.
If you have a memory saver, plug it into the OBD2 port to keep radio and module settings alive while the battery is out.
Loosen the negative terminal clamp with the 10mm socket and lift it off the post. Move it aside so it cannot touch metal, then loosen and remove the positive clamp.
Undo the battery hold-down bracket with the 10mm and 12mm sockets and the extension. Keep the bolts somewhere safe.
Lift the old battery straight up and out, keeping it level so no acid spills. Set it down on a stable surface away from the car.
Clean the tray and terminal posts, then lower the new battery in with the posts facing the same way as the old one.
Refit the hold-down bracket and tighten it until the battery cannot slide or rock, but do not over-tighten the bolts.
Connect and tighten the positive clamp first, then the negative clamp last. Spray anti-corrosion protection on both posts.
Start the car and check the dashboard. If windows or steering need resetting, turn the ignition on and move the wheel lock to lock, then check the charging voltage with the engine running.
Tips and common mistakes
Always take the negative terminal off first and put it back last, or you risk a spark and damage to the car's control modules.
Fit an AGM battery rather than a standard flooded one, since the RX 350's stop-start and electronics need steady voltage.
Never lay a wrench across both posts, and keep the old battery upright until you can take it to a recycling point.
If warning lights stay on after the swap, drive a short distance and repeat the steering lock-to-lock reset before assuming something is wrong.
Questions
How do I know the new battery is charging properly?
With the engine running, check the voltage at the battery terminals. A healthy alternator should hold roughly 13.5 to 14.5 volts across the posts.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
