Without knowing the model year or the type of engine :
No
The 3.0 liter " Vulcan " V6 engine and the 3.8 liter V6 engine
use ( 1 timing CHAIN )
The 3.0 liter " Duratec " Dual Over Head Cam V6 engine has
( 1 timing CHAIN to each cylinder head , so there are 2
timing CHAINS )
( even the 2.5 liter four cylinder engine available in the
1986 or so ,Mercury Sable has a timing CHAIN )
There is NO TIMING BELT on a 1995 Mercury Sable * Both the 3.0 and the 3.8 liter V6 engines in a 1995 Mercury Sable have a timing CHAIN
The 1997 Mercury Sable does not have a timing belt, it has a timing chain that normally requires no replacement and should last the life of the engine.
In a 1989 Mercury Sable : Both the 3.0 and the 3.8 litre V6 engines have a timing CHAIN
There is no timing belt on a 3.0 DOHC. There are two timing chains which are inside the engine under the timing cover.
The 3.0 liter " Duratec " V6 engine used in the 1996 Mercury Sable has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
There is no timing belt on a 2003 Mercury Sable The 3.0 liter " Vulcan " V6 engine has ( 1 timing CHAIN ) The 3.0 liter " Duratec " Dual Over Head Cam , V6 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
The engines in a 2004 Mercury Sable do not have a timing belt The 3.0 liter " Vulcan " V6 engine has ( 1 timing CHAIN ) The 3.0 liter Dual Over Head Cam " Duratec " V6 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS
On a 1998 Mercury Sable : The 3.0 liter " Vulcan " V6 engine has ( 1 timing CHAIN ) The 3.0 liter " Duratec " V6 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
routing for serpentine belt 2003 mercury sable
In a 2002 Mercury Sable : The 3.0 litre " Vulcan " V6 engine has ( 1 timing CHAIN ) The 3.0 litre " Duratec " V6 engine has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
It has a chain that requires no maintenance and should last the life of the engine.
The 2004 Mercury Sable with the 3.0 Vulcan engine is equipped with a timing chain, not a timing belt. Timing chains are generally more durable and require less frequent replacement compared to timing belts. It's important to maintain regular engine checks to ensure the timing chain remains in good condition.