on the cowl ... where else
The cowl is the black panel in front of / below the windshield - the wiper arms poke through it. See "Related Questions" below for more
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A car has many panels such as a door panel, a header panel, a rocker panel, cowl panel, need more info to answer that Q.
removetheoldputnewon
That would be the panel between the bottom of the windshield and the rear of the engine compartment hood.
To change the rear spark plugs the cowl panel must first be removed. Take off the wiper blades, then with the hood open remove the cowl panel. The plugs are fairly easy to get to once the panel is removed.
Cowl panel
It is called the 'Scuttle panel' or the cowl.
You will need to raise up the driver side wiper once the hood is opened.On the freestar the cowl is being held on by pushpins rather than screws on the top cowl cover.On the bottom cowl cover there are screws on the right and left, but the windshield wiper mechanism is also attached to the underside of the lower cowl panel on the drivers side, so you will need to disconnect the wiper hose and electrical connector to completely remove the cowl; leave the wiper assembly attached to the cowl.
IT IS LOCATED UNDERNEATH THE INSTRUMENT PANEL, NEAR THE LEFT HAND COWL SIDE TRIM PANEL. IT SIMPLY PLUGS IN.
On a Passat, the battery is located under the hood. It is under the cowl panel and requires the removal of the battery cover to see it.