Well I went to the napa store online to compare the knock sensors because my g35 coupe had that particular obd II code for the low input back 1 for knock sensors. One was priced for 119.00 and the other one for 33.00 and I tried to compare them but could not get the difference. The Napa online stated the sensor was compatible with my year and model. Any suggestions, oh by the way I have place to order the sub harness. Here is the information.




Detonation Knock Sensor
Part Number: ECH DKS646

Product Line: Echlin Ignition Parts

IMPORTANT INFO: Early

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311 A West Lee Street Green...
Store Number: (336) 273 - 5555

$154.99 /ea



Available within 24-48 hours. call your store to confirm.


Quantity:Add to Cart

















Detonation Knock Sensor
Part Number: ECH DKS584

Product Line: Echlin Ignition Parts

IMPORTANT INFO: From 8/02;w/ NGK

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311 A West Lee Street Green...
Store Number: (336) 273 - 5555

$33.39 /ea



Available within 24-48 hours. call your store to confirm.


Quantity:

 

Great thanks for explaining in such a way...

 

Looks like the difference is based on when your car was manufactured. The door sticker should have a date of manufacture on it. If it was made AFTER 8/02 then you need the second option, if it was made before then (ie an early 03 model) then you need the more expensive one.