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How to Locate and Remove Fuel Pump 97-05 Lexus GS300

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How to Locate and Remove Fuel Pump 97-05 Lexus GS300

Created on: 2019-05-06

Check out this video from 1A Auto to learn how to find, remove, and replace a broken or failing fuel pump in your 97-05 Lexus GS300.

  1. step 1 :Removing the Rear Seat Bottom
    • There are locking tabs under the front of the seat bottom at the passenger middle and driver sides of the seat
    • Pull up firmly on the front of the seat at the three locations to release the locking tabs
    • Rotate the seat rearward and pull forward to pull the rear hooks out from their brackets under the seat top
  2. step 2 :Accessing the Fuel Sending Unit
    • Remove the three 10 mm nuts securing the fuel pump access door on the driver side
    • Pull free the wiring harness boot
    • Lift the door and set it aside
    • Disconnect the fuel pump electrical connector using a screwdriver to pry the tab if necessary
    • Pry out and remove the locking clip to disconnect the vapor line
    • Remove the eight 8 mm bolts securing the fuel sending unit to the tank
    • Pull the sending unit straight up. Be careful not to splash or spill fuel
    • If you need to remove the sending unit, disconnect the interior hose that feeds the sending unit from the other side of the tank
  3. step 3 :Replacing the Fuel Sending Unit
    • Reconnect the interior hose if it was removed
    • Replace the fuel sending unit into the tank
    • Replace the eight 8 mm bolts, starting them by hand and then tightening in a crisscross pattern.
    • Reconnect the vapor hose
    • Replace the vapor hose locking clip
    • Reconnect the electrical connector
    • Replace the access cover
    • Replace the three 10 mm access cover nuts
    • Replace the wiring rubber bushing
  4. step 4 :Installing the Rear Seat Bottom
    • Replace the seat so that the rear hooks slide into their brackets under the seat top
    • Slide the seat rearward into place
    • Press firmly to set the locking tabs under the front of the seat into place

Tools needed for replacement

  • Ratchets & Related

    Socket Extensions


  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    8mm Socket

    10mm Socket

Installation Video
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Hi, everyone. Sue here, from 1A Auto. And today, on a 2001 Lexus GS300, I'm going to show you the location of the fuel pump. It is in the gas tank, but there's an easier way to get to it. If you need any parts for your car, click on the link below and head over to

First thing you're going to have to do is go into the back of the car, and you're going to remove the bottom half of the passenger seat in the back. And it's a pretty simple procedure. There's three clips. One in front of each where the legs go, and then one in the center. So you're just going to grab real firmly and pull up. See if I can do this. There we go. Got it. And you're going to just get it out of your way—get it out of your own way. There's just two hooks in the back. So you're going to slide it forward, like that. Lift it up. You can move this right out of the way.

So here is a great access door to the fuel pump sending unit inside the gas tank. This particular model is rear-wheel drive. So you would have to take the whole exhaust down, take the drive shaft down to drop the tank because it's a double-sided tank. Swaps over the hump, here, from underneath. So they're nice enough to put in an access door for your fuel pump. 10mm socket.

Release three of the mounting bolts. You've got the wiring harness boot that you're going to break free. Open the door. And there is your fuel pump sending unit. There's a clip right here in the connector. Squeeze that and pull up. So I'm going to get a little screwdriver. I'm going to slide it right down between that; push that tab out; lift it up. So there's your connector, and you can do your testing from here. You can test for your battery voltage, your ground, your signal going to the pump. Make sure the pump is bad because I hate to see you replace the pump—very expensive if you have no power to it. So always do the proper testing.

This vapor line—pretty easy to come off. See this clip—need a flat blade screwdriver. You're going to pry this out, just like that. So once you pop this connector, it's got to come all the way out to get that hose off. Make sure it's all the way out of the way, and then you can just lift that hose right out. Going to try to tuck that in up front of the tank, right here. And now I'm going to use my hand 8mm socket, and hope that none of these break.

The smell of gas so early in the morning. Bolt is stuck in there. So just going to bring it back in a little bit; see if I can get my socket off. There we go. Loosen them all up. So now I'm taking off the last bolt that holds that down on the gas tank. Let's see if I can pry this out. There's gas in here, obviously. So just be careful of how much—you don't want to dump out inside the car.

So because it's a split tank, just so you know, there is a line that is connected in here, and it's on the backside, over here. See if I can get it out a little bit clearer for you. Okay. See that clamp right there? You're going to have to disconnect that because that line's going over to the other side of the tank. So gravity feeds this out of the tank as the pump runs dry. Well, I don't think I have to take it all the way out for you. I think you can see it from here what you have to do and how to access it.

It's pretty tight in here, so I would not suggest starting these with a Phillips screwdriver because such fine threads are just six millimeters by probably 1.0 pitch. So you want to make sure that you start them by hand. These are very easily cross-threaded, and it's not something you want cross-threaded because you sure the heck don't want gas seeping out. That can leave for a dangerous ride, let alone smelly ride.

So when I tighten this, I actually am doing a crisscross pattern all the way around. One, because there's a seal, and two, because they're really small screws and I don't want to stress one out by—if this covers just at an angle and slightly tilted, I don't want pressure on it, and I don't want the bolt to snap on me. So just like a lug nut, just crisscrossing the pattern all the way around. Then I'll probably check them one last time; make sure they're nice and snug. Going to start from where we started; crisscross pattern. As you can see, I'm just doing this with my hand strength.

Wonderful. Okay. Let's get that hose; remount that hose. Flush it down. Not flush it down. Push it down, so it's flush. And then reinstall that clip. And like I say, I pulled on that. You can see that it sits on both sides, holds that flat air—the air part of the hose part down—and then I'm going to reconnect my connector ‘til it snaps. Oh—what's happening there? It's backwards. There we go. I've got the three mounting screws, here. Make sure you always put that rubber bushing back down. You want no rain, no weather coming in.

So you put the seat in; bring the backside of the seat up underneath, and you'll see this metal bracket. There's a hook in here, right here, and you make sure that hook is on that top of that bracket. Bubblicious. So then you give it a push down, and you're going to get all three of these front hooks that we pulled up on in place. And let's put a little heat behind it; hear it snap, and there's three of them. Yup—not there yet. There we go. Oh—middle one's in. So it's as easy as that.

So underneath the Lexus, here is the design of that fuel tank. It's a split tank, like I was telling you, from up top, and here is the drain. So you want to drain the fuel out before you remove the fuel pump from the upper side.

Thanks for watching. Visit for quality auto parts shipped to your door. The place for DIY auto repair. And if you enjoyed this video, please click the subscribe button.

Tools needed for replacement:

    Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 8mm Socket
  • 10mm Socket

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