The transmission oil filter is in the transmission drip pan under the driver's side close to the front tire. there is no transmission filter. there is how ever a oil filter which is located on your bottom right or possibily left side of your motor. the transmission however holds trans mission fluid which can be drained!
Front right side
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The fuel filter is located against the firewall on the right side next to the power steering fluid
Any brand 90 wt. oil will do fine.
Its located under the air filter box almost under the battery.
I believe it is a input speed sensor. Hyundai calls them pulse generators on the 99 elantra.
1-3-4-2
four
Oil for Elantra10W-30 or 5W-30Please NOTE that since you left out the Year of your Car, and which engine you have your Capacities MAY be different.I did check 1999 thru 2004 and as you see they were a bit different.Here are a couple.1999 HYUNDAI ELANTRA 2.0L 4-cyl Engine Code DOHC.CAPACITIESEngine, with filter..........4.2 quarts[1]Cooling System, Initial Fill..........6.4 quartsAutomatic Transmission, Total Fill..........7.0 quartsManual Transmission, ..........4.6 pints[1] After refill check oil level.2004 HYUNDAI ELANTRA 2.0L 4-cyl Engine Code D DOHCCAPACITIESEngine, with filter..........4.1 quarts[1]Cooling System, Initial Fill..........6.4 quartsAutomatic Transmission, Total Fill..........8.3 quartsManual Transmission, ..........4.6 pints[1] After refill check oil level.Good Luck and Remember.Change Your Mind, Not Your Oil.Use the First In Synthetic Motor Oil's.
On my 1997, it's under the transmission. It actually fits into the bottom side of the tranny and is held in with really long bolts.
If the VSS is defective replace the instrument cluster.