Location of knock sensers 1999 lexus 300es

The sensor is located on the front of the engine, under the intake manifold to the right. It's to the left of the oil filter housing above the starter. The electrical connector is clipped to the oil dipstick tube.

the knock sensor is in the block under the manifold if its a v6 it is under the manifold between the cyl heads may have to take intake manifold off to find it

Looks like the wire from the sensor to the module is dark blue.
You can find the engine diagram on autozone's website under repair help.

Just ahead of the starter the knock senser just screws into the side of the block. The problem is it screws into the engine coolant and the coolantr will come out then you remove the old senser. even if you frain the raditor coolant will still be in the engine ( quite alot) and you'll need to catchir in some way. You can get about 2 gallons. The messly way to do it is to ( with the engine cold) loosen the senser till you can turn it by hand. With the new senser in th=your other hand remove the senser and quickly screw the new senser in. You'll almost certainly get coolant on you so be eady, covering your eyes and arms ( glasses and a raincoat) you do it quickly eniugh very little mess will be made. The plug just squeezes and pulls off. Knock sensers seldom fail but the connection and the wires do. Someone replaceing the startercan hit the senser and break it. Don't drop the senser as the fall can break it too.

The knock sensor is on the exhaust manifold And the cam sensor is on top of the oil pump drive.It's triggered by a pulse ring
Hope this helps

As a rule they are mounted somewhere on the block. It looks like this and will have a 2 wire harness plugged in. Probably on the rear about in the middle of the engine block

on engine block on both side they thread in clockwise

Hi, my 01 Mill. noc senser was on top of the motor, but under the intake! needless to say it cost alot... had other stuff done so I can't tell what cost was ($1800 total)

Your sensors that you changed were probably good.here's a link on your code. P0332 OBD II Trouble Code

The temperature sensor is what usually tells the fan to power on, it should be located near the thermostat in the cooling line, it would be a good idea to check the fuses first and the fan relay.