i noticed it when i was changing my fog light bulbs..





its right in front of the radiator, just udner the latch.

im guessing maybe the outside temp indicator??? but why? if its right in front of the hot ass radiator?

o2 sensor?

hahahahha... in the open? its almost visable from the front grill.. but behind the bumper.

my guess is that it's the flux capacitor or the heater block attachment

If it was, then it wouldn't matter as long as the car is moving...and it'd be in a good position to determine what the outside temperature is (ie: not so low as to be affected by radiant heat given off by the road or maybe cooler air, as in the concept of cold air intakes)

that's right... it should be the outside temp. sensor...
i installed something similar to that while installing a jdm digital climate control on my prelude.

It's the outside temp sensor.

why in the world would they put it right in front of the radiator? that doesn't add up to me.

Front Impact Sensor for Airbag deployment.

cause the air is coming towards it. the radiator is not giving off heatenough to change the temp reading especially since the air is going through the radiator.

Because the sensor is close to the radiator, the temp reading is not accurate until the car is in motion for a little while. Even then, the temp still could be off. That's why the car has an calibration adjustment (a few degrees) you can do for correction.

Exactly right. The owners manual states as much. I've found the temp readings to be remarkably accurate in the TSX, but the car has to be in motion. The temp creeps if the car remains stationary.

nope...

the airbags are set off by MEMS (Micro-Electro-Mechanical Systems) accelerometers which will trip after something like 30g's of acceleration... the accelerometers in the different sensors are aranged in different axis therefore the airbags work independently of each other depending how you are hit...there sensors are located fairly close to the airbag in each case, you dont want a lot of wiring which could be damaged on a safety system...

also having it installed somewhere close to where the person is sitting in the car is a better point of reference to measure the acceleration from, the front end is a crumple zone so the accident could be absorbed enough to not require airbags to go off...

http://auto.howstuffworks.com/airbag1.htm

about MEMS...
http://www.memsnet.org/mems/what-is.html

i noticed the same thing, just never bothered to see where it was installed...

Makes sense! Thanks.