Jetta 99 VR6
 

driving down hwy all sudden shut down. Now getting codes Knock sensor and 2 O2 sensor codes does crank thought at first timing belt but can feel compression? any thoughts ideas??

1) where is Knock sensor?

update
 

checked spark seems to have but weak, checked fuel pump seems to be intermitent cant tell no ideas?

here's some information about the knock sensor on your 99 jetta - Volkswagen Jetta Knock Sensor at Auto Parts Warehouse

best of luck.