Two
The key battery for the ls400 is PN# br1216 www.lextechautomotivellc.com
probably mph or kph
bottomof dash drivers side
1991 Lexus ls400 hard steering at ilde rack &pump have been replace all screencleaned or removed.
Yes these are the same from 90 to 94 models www.lextechautomotivellc.com
No Belt=It has a Timing Chain.=
Your 1991 Mercury Topaz 2.3 liter has a timing CHAIN
it has a timing chain. IT HAS A BELT !!
The 3.3L has a timing chain.
The 4.3 litre V6 engine in a 1991 Chevrolet S-10 has a timing CHAIN
The 1991 2.5 L 4 cylinder has a timing chain and ita bear to get in and out This motor has timing gears it doesn't have a chain or a belt.