The "Related Questions" below gathers together a ton of information about this secondary air / EGR / DPFE and other stuff related to the 401 trouble codes.
On a 2002 Mercury Sable the radiator is at the front of the engine compartment
On a 1999 Mercury Sable : The transaxle ( transmission ) is located in the engine compartment , bolted to the engine
In a 1998 Mercury Sable : The transaxle is the transmission on your front wheel drive Mercury Sable it is located in the engine compartment , on the drivers side , bolted to the engine
On a 2004 Mercury Sable : The battery is in the drivers side of the engine compartment at the front
The 2000 Mercury Sable starter can be found on the right hand side of the engine. The starter will be near the back of the engine.
how do i change out a power steering switch on a 2001 mercury sable with a 3.0 engine?
A V6 engine in a Mercury Sable takes ( 6 spark plugs )
On a 2001 Mercury Sable : The battery is located in the front of the engine compartment , on the drivers side
The transmission ( or in the case of your front wheel drive 1998 Mercury Sable , the " transaxle " ) is located in the engine compartment , on the drivers side , bolted to the engine
On a Mercury Sable , V6 engine : firewall 1-----2-----3 4-----5-----6 front of vehicle > driver
Ummm...in the engine?
That really depends on what model year of Mercury Sable , and which engine you have A little more information please