How to Replace a Toyota Previa Alternator

Alternator driven by a drivebelt and pulley.

The alternator on your Toyota Previa only has three mounting bolts, a connector and 2 wires you need to remove or disconnect the replace it. However, if you have the 2TZ-FE engine, you will have to do some of the work from underneath the vehicle; if you have the 2TZ-FZE engine, you need to remove the air duct and coolant reservoir for better access to the alternator. Whichever your model, you can install a new alternator.

Difficulty:

Moderately Easy

Instructions

things you'll need:

• Wrench set
• Ratchet and socket
• Ratchet extension

1. 2TZ-FE Engine

   • 1

     Park your car in a safe place, raise the front of the vehicle using a floor jack and safely support it on 2 jack stands. Remove the engine cover from underneath the vehicle using a ratchet and socket.

   • 2

     Open the hood, disconnect the wire from the alternator adjusting bar, and unplug the alternator electrical connector.

   • 3

     Remove the wire from the alternator using a ratchet, ratchet extension and socket to reach and remove the wire nut.

   • 4

     Loosen the alternator lock bolt, adjusting bolt and pivot bolt-loosen the pivot bolt from underneath the vehicle. Use a wrench or ratchet and socket; then remove the drive belt off the alternator pulley.

   • 5

     Remove the lock and adjusting bolts; then remove the pivot bolt from underneath the vehicle and pull the alternator off the vehicle from underneath the engine compartment.

   • 6

     Set the new alternator in place, working from underneath the vehicle, and install the pivot bolt; then install the adjusting and lock bolts. Install the drive belt over the alternator pulley and adjust and tighten the adjusting bolt; then tighten the lock and pivot bolts.

   • 7

     Plug the alternator electrical connector and wire; then install the adjusting bar wire and engine undercover.

   2TZ-FZE Engine

   • 1

     Remove the air duct and the mounting bolts form the engine coolant reservoir; then move the reservoir to the side.

   • 2

     Disconnect the black, negative battery cable, then disconnect the positive battery cable and remove the battery.

   • 3

     Loosen the idler pulley nut from the center of the pulley-the idler pulley is located next to the alternator; then loosen the pulley adjusting bolt located behind the idler pulley. Lift the drive belt off the alternator pulley.

   • 4

     Unplug the alternator electrical connector and the wires from the alternator and alternator upper bracket.

   • 5

     Remove the three alternator mounting bolts using a wrench and ratchet and socket; then lift the alternator off the engine compartment.

   • 6

     Set the new alternator in place and tighten the three mounting bolts; plug the alternator electrical connector and connect the alternator and bracket wires.

   • 7

     Install the drive belt over the alternator pulley and adjust the belt by tightening the idler puller adjusting bolt; then tighten the pulley center nut.

   • 8

     Install the battery, coolant reservoir and air duct.