If equipped normally a block heater is installed in freeze out plug on the block. Unaware of this being a factory option.
It may or may not, block heaters are not factory installed unless special ordered.
On the 98, there is no block heater installed right out of the factory, so therefor, there won't be a plug. If you want a block heater installed, you can get ones that either magnet or glue to the bottome of the oil pan. I believe that this is the only option for the passat.
The Block heater plug location is dependent on:YearEngineWas factory installed or dealerHas the cord be replaced or repaired.On occasion I have had to crawl under a truck, find the block heater and follow the cord to the plug.
No factory installed unit. OEM stopped block heaters after consumers reported engine compartment fires using block heaters.
It is rarely installed from the factory. Normally you have to buy it from the dealer and install yourself.
My 92 Protege didn't have a block heater, I had to get one installed.
Cars do not come with a block heater normally, it is something you have to have installed aftermarket
There isn't a block heater, unless the previous owner installed one.
A block heater is not a standard item for most vehicles. They have to be installed aftermarket.
Since they no longer make a 2001 Subaru Outback, it depends on whether yours was equipped with one. It was an option so if you are asking if every one had a block heater, the answer is "no".
The block heater ( if equipped ) is a heating element installed in place of a freeze plug.