Where is the battery in a Volkswagen Passat

The battery is in the engine compartment on the left side.
With the more powerful 3.2, 3.6 engine installed, the battery is located in the trunk of the vehicle on the left side.

The battery should only be disconnected when the ignition is off, as otherwise the injection system control unit will malfunction.

If the battery is disconnected, the engine, transmission and anti-lock braking system fault codes are erased from the memory device. Before the battery is disconnected, the memory device is interrogated at the repair shop. If the battery has been disconnected but the same faults occur after the test drive, the fault codes are stored in the memory device again. Other permanently installed instruments (e.g. radio and clock) stop functioning when the battery is disconnected and must be reprogrammed when the battery is reconnected.

Standard radios are also equipped with a tuning code. Coding of the anti-theft system prevents it from being switched off by unauthorized persons if the power supply is interrupted. The power supply is interrupted not only by disconnecting the battery, but also by removing the radio receiver or blowing its fuse.

Removing the vehicle battery

  • Switch off ignition.
  • Open the engine hood.
  • If available, remove the battery cover on top of the battery.
  • First, disconnect the earth cable on the battery and then the positive terminal cable.
  • Unscrew and remove the retaining plate at the base of the battery.
  • Slide the battery out of the battery retention plate -1- and remove.

Batteries contain poisonous substances that should not be disposed of in the household waste. Take old batteries to special collection points.

Inserting the vehicle battery

  • Insert the battery into the battery retention plate.
  • Position retaining plate -2 on the battery bracket 4 and tighten it to a torque of 20 Nm.
  • Check that the ignition is off. Important: Connecting the battery with the ignition will damage the electronic control units.
  • Connect the positive lead to the positive terminal (+) and then connect the earth lead to the negative terminal (-).

Incorrect connection of the battery can cause significant damage to the alternator and electrical system.

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