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How to Install a Fuel Filter on a Toyota Corolla

by Dan Ferrell

Your Toyota Corolla provides an access door to remove the fuel pump and filter without the need to lower the fuel tank. Most models are similar with the exception of those built from 2002 to 2004, which require a fuel lock nut wrench to unlock the ring from the fuel pump assembly. Whatever your model, follow this guide to install a new fuel filler on your Corolla.

Step 1

Park your car in a safe place and relieve the fuel system pressure. Remove the rear seat and unscrew the floor service cover mounting bolts, using a Phillips screwdriver; or remove the sealing tape, depending on your particular model. Once you remove the cover, you will see the fuel pump assembly mounted on the fuel tank.

Step 2

Unplug the fuel pump electrical connector from the fuel pump assembly. Start the engine and let it run until it stalls; then disconnect the black, negative battery cable and remove the fuel tank filler cap.

Step 3

Unplug the fuel pump vapor pressure sensor electrical connector if your model is equipped with one; then pull the fuel line clip using a pair of nose pliers. Disconnect the fuel line from the fuel pump assembly.

Step 4

Remove the fuel vent line by pressing the tabs on the retainer and pulling the line off the assembly. If you have a 2002, 2003 or 2004 model Toyota Corolla, unscrew the retainer ring mounting bolts using a Phillips screwdriver; otherwise, use a fuel lock nut wrench to unscrew the ring.

Step 5

Lift the fuel pump assembly off the fuel tank and discard the O-ring located between the assembly and fuel tank. Remove the fuel filter from the assembly and install the new unit.

Step 6

Install a new O-ring and set the fuel pump assembly in place. Screw the retainer ring or use the fuel lock nut wrench. If you are using the wrench, align the indented mark on the tank with the tab on the fuel pump assembly mounting surface; align the mark on the retainer ring with the previous marks and rotate the ring 2 complete turns using the fuel lock nut wrench.

Step 7

Press the vent line on its fitting until the lock snaps in place; then install the fuel line and secure it with the clip; plug the fuel pump vapor pressure sensor electrical connector and the fuel pump electrical connector.

Connect the black, negative battery cable and install the fuel tank filler cap. Start the engine and check for leaks; then turn off the engine and set the fuel pump assembly service cover in place. Install the mounting screws or seal it with butyl tape and install the rear seat.


  • Most auto part stores will loan you special tools for almost any vehicle repair job.


  • When working on the fuel system of your vehicle, do not allow smoking near or around the car and park away from appliances with open flames like water heaters and dryers to avoid a possible accident.

Items you will need

  • Stay away from open flames.
  • Phillips screwdriver
  • Nose pliers
  • Fuel lock nut wrench
  • New fuel pump assembly O-ring
  • Sealing butyl tape

About the Author

Since 2003 Dan Ferrell has contributed general and consumer-oriented news to television and the Web. His work has appeared in Texas, New Mexico and Miami and on various websites. Ferrell is a certified automation and control technician from the Advanced Technology Center in El Paso, Texas.

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Photo Credits

  • Photo courtesy of IFCAR at