2003 Chrysler 300M Change the Battery

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The 2003 Chrysler 300M was designed to be a luxury car, something to set apart the Chrysler brand. One design change that they made in the process was moving the position of the battery. Instead of mounting it in the engine compartment like most manufacturers, they hid it in the car, making replacing the battery a moderately difficult and tedious task. This process can be done within an hour or so, and does not require any special tools.

Tools Used[edit]

Jack stands
Tire iron
Flat-head screwdriver
3/8-inch ratchet and socket set
Open-end wrench set
Replacement battery

Change the Battery[edit]

  • Pop the hood. Disconnect the hose clamps connecting the air-intake tubing to the air-filter box using the flat-head screwdriver. Lift the air-filter box up and out of the engine compartment. Jack up the car using the jack and set the front end on jack stands. Unbolt the driver's side wheel using the tire iron, and move it out of the way.
  • Remove the clips holding the inner fender liner to the fender using the flat-head screwdriver. Unbolt the battery tie-down using the 3/8-inch ratchet and socket. Pull the battery partially out of the fender well, then unbolt the negative terminal from the battery using an open-end wrench. Unbolt the positive terminal next, following the same procedure.
  • Remove the battery from the fender well. Set the replacement battery in the tray and connect the positive terminal, then the negative terminal on the battery using the open-end wrench. Slide the battery into the tray and bolt down the battery tie-down.
  • Reinstall the black plastic fender liner using the factory clips. Reinstall the driver's side tire using the tire iron. Reinstall the air-filter box using the flat-head screwdriver in the reverse order of disassembly.
  • Lower the car off the stands using the jack.