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Unread 08-18-2018, 06:34 PM   #1
White Boomer (Kangaroo)
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Join Date: Jun 2005
Location: SoCal
Posts: 5,807
Default Fuel/air ratio sensor (Not an 02sensor)

Need to change the air/fuel ratio sensor on Sams 04 4.0ltr engine. Iíve read that on the 4.0 the upstream are air/fuel sensor, NOT oxygen sensors. Most threads I read elsewhere, people had to go to Toyota for an original part that was $200 for 1!

What about this as an alternative?
04 V8 SE, RST Twin sticks, RST Taco Front Axle, RST 4-link rear, 17x9 MT ClassicLocks, 37" Cooper STT Mud, SW Sliders & Bullbar, ARB Locked F&R, 4.56's, Smittybilt 10,000lb winch, Radflo 2.5 resi coilovers, Radflo 2.5 rear shocks, 1.5 4Crawler BL, Flowmaster, CB, 2m/70cm Ham, CO2, Lightforce, African Outback Rack, Budbuilt, FrontRunner RTT. OFFROAD PARKS BLOW!
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Unread 09-15-2018, 07:48 PM   #2
Senior Driver
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Join Date: Jun 2005
Location: South Bay
Posts: 536

Mark, I've replaced two sensors so far on my 4th gens, but can't remember if they were just O2, or fuel/air sensors..
Bought both on Amazon, believe it or not!
Both were Denso's, which I believe is factory.
I paid much less than $100 and replaced them my self.
Toyota dealer wanted like 375-400 and it ended up costing me like $70-ish and 15 minutes.
'04 4Runner 4X4 SE V8 - Shrockworks bumper - Hanna sliders - Donahoe CO's/Deaver springs/Bilstein 7100's - BFG KO 265/70/17
'06 4Runner 2X4 SE V8, for the kids
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