joeypruett

Maybe its just me, but if the airbag light was turned off at the dealer and has not come on again. I would think that there is nothing wrong with the airbag system. (as long as that light appears when you turn your key to the acc. position).

that's our opinion too. we just weren't sure if the sensor could still be bad if the light was off.

the dealers don't try to save us money, do they?

i should start a car dealership - they're always turning my fritos into their fritos.

Also if the instrument cluster is removed the light can come on.

Have a 93 and tried to buy the air bag sensor on Ebay. Was supposed to be for a 90 to 94. Ended up with the wrong model 89170-50011. Needed 89170-50020. The unit is for sale cheap if you can use it.

Quite a job to replace. I can send you the pdf of how to replace the sensor if you need it.

Ron

thanks ron,

we think it was an errant light from a two year old A/C repair.

we'll drop you a line if we decide to replace the sensor.

thanks,

-joey

we'll try it, thanks.

Joey, what kind of gas do you use?

91 octane, usually from costco.

-joey

Did your check engine light ever appear? How did the dealer come to the conclusion your knock sensors were bad.

Just guessing, but I would hope that the beginning of your response would sound like this: check engine light came on, had it diagnosed by dealer, pulled code "--" which indicated the "knock sensor" was failing. Also, is your check engine light still on?

engine light came on intermittently, had it diagnosed by the dealer, pulled code, didn't ask about the code, i'm assuming it indicated knock sensor 1 and 2.

engine light has been OFF since the visit several days ago.

if it still needs replaced, my grease monkey mechanic could probably do it for 350 - according the sage and welcome advice on price and ease of repair.

-joey

I just looked up a knock sensor online and it runs $137 for a OEM Lexus Knock sensor. (not sure if its the same on your car mines a SC400 same engine), but the part number for my car is 59615-50010. Pretty sure its the same part but it could be a different number. So $274 (using genuine parts) if you do the job yourself. I do not know the difficulty of the job, might be easy, may not be. I would do a search on this topic and see what you find. You could also search the SC forums for the same thing since its the same engine. That would save you approx $500 if you could do it yourself.

thanks. dealer says it's difficult to repair as it's deep inside the engine.

sounds like you would definitely replace them? the car doesn't knock that we can tell - but there may be other benefits. what's really odd is that we don't see any dash lights indicating failure.

-joey

okay - question number 2.

like the previous post mentioned, my wife's LS400 (1992) supposedly has knock sensors #1 and #2 that are bad and need replaced. the dealer quoted $750 total for both. there are no engine or other lights on and i'm not sure if i should proceed.

any thoughts?

thanks again,

-joey

allo all! i'm very happy to see a place i can post my questions.

my wife's 1992 LS400 has had the air bag light on for two years. we just took it to the dealership and they say the center air bag sensor is kaput. they recommend replacing for $850 and say the air bags will not deploy until fixed.

i'd like thoughts on whether or not to replace.

the air bag light has been OFF since the visit. was the bad sensor reading an anomoly? is it okay now?

thanks!

-joey