Top 10 2003 Toyota Highlander Questions & Answers

if the air filter was recently inspected or changed, look for the vacuum hose to be disconnected from the valve located on the air filter cover. another source may be the gas cap either loose or with the tether strap caught under it preventing a proper seal

Here are all season tires available in P225/70R16 rated best to worst by tire-rack customers. It doesn't include off-road or touring tires.

Goodyear Fortera TripleTred
Avon Ranger TSE
Bridgestone Dueler H/L Alenza
Continental CrossContact LX
Michelin LTX M/S
Yokohama Geolandar H/T-S G051
Michelin Cross Terrain SUV
Firestone Destination LE
Pirelli Scorpion STR A
BFGoodrich Radial Long Trail T/A
Dunlop Radial Rover A/T
Uniroyal Laredo All Season AWP
Goodyear Wrangler HP
Bridgestone Dueler H/T D687

Replace the right rear brake lamp. The bulb possible use two filaments one for brake and tail light. One burnt out filament in one bulb.

Bank 2, sensor 2 is a heated O2 sensor located below (after) the catalytic converter on the passenger-side. When this sensor gets clogged and/or goes bad from rust and heat fatigue, the voltage drops low enough to cause the electronic control module to register error code P0161, which then causes the check engine light to come on.

To replace Bank 2, sensor 2, remove the debri shield from just behind the front bumper, underneath the vehicle. There will be 10 bolts holding it on (10mm, I believe). After removing it, look toward the center of the newly exposed area and you will see 2 finger-like objects projecting out from the engine with wires coming out of each. The one on the left (passenger-side) is bank 2, sensor 2. The one on the right (driver-side) is bank 1, sensor 2.

I got my direct-fit sensor online for $55 from Remart Auto Parts. I know it is tempting to get the universal-fit type and save the cash. But after doing that once, I wouldn't care to do it again.

I found a YouTube video showing pictures of where the two lower (after catalytic converter) sensors are located. While the video only points out the driver-side sensor (bank 1, sensor 2), it's easy to spot the other one being only inches away.

http://www.youtube.com/watch?v=TgQtZci2oOg

If anyone has found this helpful at all, please vote for me.

It is located on the bottom of the Driver's side dash, below and to the left of the steering wheel. The connector is recessed about an inch and has a black cover that has "OBDII" imprinted on it.

Check out this website: http://www.devalcourt.com/2010/03/fixing-2004-toyota-highlander-ac-and-heat-issue/
My 2004 Highlander is behaving funny-like the description in the link and then the A/C light started to blink too. I'm going to take apart the control panel first and check the connections before spending $700-1200... I hope you find a fix.

Right side , sensor closes to the engine (before the cat)

I changed my 2001 Toyota Highlander headlights recently. First, remove the grille. There is one screw in the center which will require a loonng Phillips screwdriver to reach it, down behind the grille, right in the center. Then remove the four plastic clips at the top by prying them up with a small flathead screwdriver. The bottom just pulls forward. Important: Now go to each side of the car, and in front of each fender well, there is one clip that holds the bumper cover on. Pull the top corner of the bumper cover toward you to release the clips, one on each side, at the top corner, along the front of each fender well where the bumper cover meets the fender. The bumper cover can now be loosened along the top without entirely removing it. It just pulls forward. Inspect the underside of the bumper cover for broken clips and replace as necessary. Now remove the two bolts that hold down each headlight at the top. Disconnect the wiring and bulbs and wiggle the old headlights out. Install the new ones and reverse the process. If your AC isn't blowing cold, check the condenser for leaks before you reinstall the grille. A new aftermarket condenser/filter dryer is easy to install by removing the battery and tilting the radiator back to get the condenser out. A replacement only costs $75 and can be swapped out in one half hour with a few metric sockets. Then you will need to recharge the AC system with R-134a, which is easy. Just buy a R-134a kit with hose at Autozone and follow the directions. $50 Replacement fog lights are only $52/pair for aftermarket. You may consider replacing those as well. They have a strange installation with clips and you will need to pry/bop them forward, not remove them from the back. They are aggravating to replace but not technically difficult.

hi there..... if you have a abs light on this means there is a problem
with the abs. and its usually a wheel sensor. but could be one of several problems. the only way to remove the light is to repair the fault
that is something that's isn't within the scope of the diy motorist.
and would require a visit to the professionals. only then will the light be
reset. and go out.

There is no light on for the security system, how can I tell if the security system work, i recently purchased this 2003 Highlander.