How to change the battery of the Lexus RX DIY

On the Lexus RX, the battery replacement is performed from the engine bay, gaining access by removing any covers and securing the car before disconnecting the power. Park on a level surface, switch off the ignition, wait a few minutes, and keep the key away from the vehicle. To avoid losing settings, you can use a dedicated memory saver; otherwise, you may need to reset the clock and comfort functions. Open the bonnet and locate the battery. If present, remove any covers obstructing access and check how the battery is secured to the base with a top bracket. Before removing it, disconnect the terminals safely: first loosen and remove the negative terminal, isolating the cable to prevent accidental contact, then disconnect the positive terminal while protecting the cap/terminal. At this point, loosen the securing bracket and free it from the battery, then lift the battery carefully, keeping it upright to avoid impacts and spills. Clean the housing and check that the base is stable. Position the new battery in the same orientation as the previous one, ensuring it sits correctly and that the cables reach without tension. Refit the bracket and tighten it securely, without forcing the plastic parts. Restore the electrical connections by connecting the positive terminal first and then the negative terminal, ensuring that the terminals are well seated and have no play. Refit the removed covers, close the bonnet, and perform a final check: start the vehicle, check that no warning lights appear, and that the electrical services operate normally. If some comfort functions are misaligned after disconnecting the battery, perform the normal initialisation as required (e.g., window lifter) following the vehicle's instructions.