Log in or Sign up

Welcome to 4Runners.com!
You are currently viewing as a guest! To get full-access, you need to register for a FREE account.
As a registered member, you’ll be able to:

Participate in all 4Runner discussion topics

Transfer over your build thread from a different forum to this one

Communicate privately with other 4Runner owners from around the world

Post your own photos in our Members Gallery

Access all special features of the site
Quick Links: Stuck CV axle shaft, need some help 04 V6 Tension Pulley Bearing How To: 4th Gen V6 Radiator Replacement/Tranny Cooler Install Installing 4th Gen Sway Bar Links with Heim ends 03 sr5 fuse block needs to be replace, moisture corrosion... How To: Sound Deadening, doors and floor

4th gen Oxygen sensor

Discussion in '4th Gen 4Runners (2003-2009)' started by Cityredneck, Jun 26, 2023.

Post Reply

Jun 26, 2023 at 11:59 AM

#1

#1
Cityredneck [OP] New Member

Joined:

Jun 26, 2023

Member:

#33616

Messages:

9

Vehicle:

2005 RWD 4.0 & '97 4WD 3.4

A couple questions:
1. From what I can find it looks like there are 4 oxygen sensors on the 05. Anyone know which ones are actual O2 sensors and which are a/f sensors?
2. Anyone know where I can find a good diagram? I'm mostly concerned with the upstream sensors right now.

Cityredneck, Jun 26, 2023

#1

Jun 28, 2023 at 7:26 PM

#2

#2
xtremewlr New Member

Joined:

Oct 10, 2020

Member:

#17247

Messages:

433

Gender:

Male

First Name:

Todd

Tucson, AZ

Vehicle:

2003 4Runner V8 Limited 4WD

Lots with more in the works

Upstream are AF sensors, down are the O2 sensors which are after the cats.

Whichever you replace, only use OEM Toyota or Denso for aftermarket.

xtremewlr, Jun 28, 2023

#2

Cityredneck[OP] and RumHamRunner73 like this.

Post Reply

Register FREE to Reply!

Products Discussed in

Block Tester BT-500 Head Gasket Combustion Leak Test Kit - Made in USA

AISIN FCT-072 Engine Cooling Fan Clutch - Compatible with Select Toyota 4Runner, FJ Cruiser, Tacoma, Tundra

Lisle 75500 Combustion Leak Detector

Hatch Liftgate Switch Cover Lid Compatible with Prius Avalon Sequoia Camry 4Runner Sienna Scion 84905-47010 84840-21010 926-098 84840-47020 Trunk Rear Hatch Liftgate Door Handle Switch Latch Cover

GOOACC GRC-30 120PCS Car Retainer 6.3mm 8mm 9mm 10mm Expansion Screws Replacement Kit Bumper Push Rivet Clips, 1PC Fastener Remover

Joinfworld 3 Way Round Rocker Switch 12V, Waterproof 3 Pin 3 Position ON/Off/ON 6A/250V AC 10A/125V DC SPDT Circle Toggle Switch with Wires for Auto Car Marine Boat - 8Pack

9046708217 Radiator Cover Clips Nylon Bumper Fastener Rivet Clips Auto Body Clips Retainer Clips Replacement for Toyota Lexus GX470 Toyota 4Runner FJ Cruiser Tacoma Replace 90467-08217 (20Pcs)

LEAKFINDER LF3001CS Automotive Engine Coolant Leak Detection Dye, Services Radiators, Hoses, Heater Cores, Water Pumps, 1oz Ultraviolet Fluorescent Dye Bottle, Made in USA

Prothane Universal Greasable Sway Bar Bushings - 21MM - Type A Bracket - Red

Timken 710477 Seal

RIIEYOCA 2Pcs USB Female Plug 2pin 22AWG Bare Wire,USB Power Data Cable with Dust Cap DIY Pigtail Cable for USB Equipment Installed or DIY Replace Repair （30CM）

Mothers 06112 Back-to-Black Trim & Plastic Restorer, 12 fl. oz.

Energy Suspension 9.8108G 3/4" Hourglass Shock Eye Bushing

SUNMORN Battery Terminal Connectors, 0/2/4/6/8/10 AWG Battery Terminals, Heavy Duty Car Battery Terminal, Top Post Multiple Battery Terminal, with Shims Protector Cover

Alla Lighting 912 921 LED Bulbs for Back-up Reverse Lights, 6000K Xenon White CAN-BUS 4014 30-SMD T10 T15 906 W16W 921K 922, 360° Light Backup, Cargo Lights Replacement, Extremely Super Bright

CRC 402015 Trans-X Slip-Stop Leak-Fix - 15 Fl Oz.

MATNIKS Solid Neoprene Rubber Sheet 3-Pack [Textile Finish] 6x6x1/16" Duro 65A Rubber Strip for DIY Mechanics Plumbers Home Improvement Supports Leveling Sealing Bumpers Protection Anti-Skiding

Direct Replacemnt Adjustable Windshield Washer Nozzle Mist Spray Type for 2002-2004 Oldsmobile Bravada, 2002-2009 GMC Envoy, 2002-2009 Chevrolet Trailblazer, Replace OE for 15878745

Cruiser Accessories 79150 Mounting Plate, Black, 1 mount

V8 Tools 3826 Mighty Worm 26" Flexible Magnetic Pickup Tool

Genuine Toyota 90430-24003 Front Differential Drain Plug Gasket

Capri Tools 3-0611 Long 10 mm Hex Bit Socket, 3/8" Drive, Metric

Lockitt POSI-TAP Assortment pack wire connectors 10-22 awg

Rislone 4102 XTREME LUBE® Maximum Performance Engine Treatment

Toyota Genuine Thermostat Gasket

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce

JDC Lifestyle New Improved Grip Replacement Repair Kits for Lexus Toyota Scion Liftgate Trunk Hatch Back Door Handle Switch Release Opening Button Cover

Trunk Rear Hatch Liftgate Door Handle Switch Latch Cover Release Button Rubber Cover for Prius Avalon Sequoia Camry 4Runner Sienna Scion 84905-47010 84840-21010 926-098 84840-47020 (Black)

BATIGE Square Single Port USB 3.0 Panel Flush Mount Extension Cable with Buckle for Car Truck Boat Motorcycle Dashboard 3ft

Toyota Oil Drain Plug Crushable Steel Gaskets Set of 10 OEM 12157-10010

SIRIUSLED Super Bright 3020 Chipset Canbus Error Free LED Festoon Bulbs for Car Interior Lights License Plate Dome 1.25” 31MM Festoon 3175 DE3175 6000K White Pack of 2

Metra 95-8202 Toyota DDIN Multi Dash Kit,BLACK, Single, BLACK, 14.00in. x 7.00in. x 0.50in.

FEL-PRO 23626 Exhaust Pipe Gasket

12157-10010 90430-24003 90430-18008 Differential and Transmission/Transfer Case Drain Plug Crush Washers Gaskets Compatible with Toyota 4runner Tacoma Tundra FJ cruiser Land Cruiser

FIAMM 72102 Freeway Blaster HIGH Note Horn

ZAKRA License Plate Frames,2 Pack Silicone License Plate Frames,Premium Silicone Material, Rust-Proof,Rattle-Proof,Weather-Proof.(Black)

SKF Seal (18491)

Gear Shift Boot Cover,Car Gear Shift Knob Gaiter Boot PU Leather Dustproof Cover Replacement for Toyota Corolla

Keymall keyless Entry Replacement Upgraded Flip Key FOB 314MHz 4D67 Chip 4B Fob Remote for Toyota 4Runner Sequoia ,HYQ12BBX HYQ12BAN HYQ1512Y

RELD Head Gasket Tester Kit Combustion Leak Detector for 50 Tests

Alla Lighting 1156 7506 BA15S 50W 6Ohm Error Free LED Lights Load Resistor Adapter Fix Flashing Fast Blinking Canbus Bypass Wiring Harness for Upgrading LED Turn Signal Blinker Back-up Light Lamps

Bar's Leaks High Mileage Transmission Repair-It, 16.9 Fl Oz