LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

'92 LS 400 Knock Sensor

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Old 12-19-13, 03:05 PM
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jerryparks
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Default '92 LS 400 Knock Sensor

I need to buy a new Knock Sensor for my LS. On E-Bay, prices are all over the spectrum. Does it make any difference which one I buy? Need some advice.
Old 12-20-13, 05:09 AM
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python
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go to napa and get them, they are reboxed oem,or the dealership. u need to get the connectors/pigtails..get those from the dealer.
if u haven't,u might as well do ur starter while ur in there..buy denso only!
Old 12-20-13, 05:20 AM
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LScowboyLS
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I would definitely do starter solenoid contacts and plunger while in there!
Old 12-20-13, 09:41 AM
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I already did the starter. Made the mistake of not checking the knock sensors. I bought a re-man Autozone starter for $ 100.00 with discount and it works perfect. Any reason why I should not buy one of the reasonably priced sensors on E-bay? There is a wide price range on sensors for the LS on E-bay. Old starter had other problems besides the ones that the repair kit could fix. Also got a lifetime warrenty on the Autozone starter.

Last edited by jerryparks; 12-20-13 at 09:48 AM.
Old 12-20-13, 02:43 PM
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LScowboyLS
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a lifetime warranty doesn't cover the huge amount of labor involved in doing a starter - that's why I use OEM parts
Old 12-20-13, 03:55 PM
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Cowboy: Have you got any wise words of advise on the knock sensor purchase?
Old 12-21-13, 05:18 AM
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python
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I have a 92 and went through this exact scenario...replaced mine over 5 years ago after I failed to do mine during a starter replacement
Old 12-21-13, 05:26 AM
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python
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btw here is a quote from cowboy regarding knock sensor replacement, check post #5
https://www.clublexus.com/forums/ls4...cal-issue.html
Old 12-21-13, 05:34 AM
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Originally Posted by python
btw here is a quote from cowboy regarding knock sensor replacement, check post #5
https://www.clublexus.com/forums/ls4...cal-issue.html
I still say that I would skip the routine replacement of knock sensors, if the only reliable choice is the OEM sensors and pigtails, at a cost of $500+ on an old car for a part that rarely fails - now if someone has experience with an aftermarket knock sensor that performs like the OEM sensor and has been reliable and is cheap, then I could definitely get on board with that, but I have not seen many knock sensor failures, and so have no idea which aftermarket sensor is good quality, if any are.

also, the knock sensors are far more critical for the folks who insist on running regular octane gas, or folks who live in countries where the quality of the gas is often sub-par.
Old 12-21-13, 06:02 AM
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python
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either way it makes absolutely no sense to go into the valley of death on these engines and not replace these sensors while ur in there...an ounce of prevention is worth what?
Old 12-21-13, 06:09 AM
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python
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btw u can get the knock sensors from rock auto pn ks94 for 106.00 x 2 is 212. the pigtails are about 35 a piece from the dealer,thats roughly 300.00
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