Sensor removal on top of driver's side shock absorber

The crankshaft sensor is located on the driver side of the vehicle, above the differential housing. The bottom of the sensor sits above the drive plate.
Drivers side just above oil pan just behind differential

1. Disconnect the negative and positive battery cable.
2. Remove the battery.
3. Unlock and disconnect electrical connector from crankshaft position sensor.
4. Remove sensor mounting screw. Remove sensor

it depends on what motor you have most common is the v6 3.3 and 3.8 liter but the voyager has a 4 cylinder i thing a 2.4liter its going to on the block near the transmisson if its the v6 look on the drivers side remove the air filter housing (3 10mm bolts on radiator core support 2 on top 1 sideways facing the steering wheel and loosen 2 hose clamps with flat head screw driver or i think 8 mm socket)take off all the air filter housing parts than look down towards the firewall down by the rack and pinion you can see the connector its kinda flat black in color with a blue or red lock tab that slides side to side release that lock tab and then unplug it.It is held in by 1 10mm bolt and pulls out straight upmake sure the new sensor has a (usually green) spacer on the end of the sensor and leave it on the sensor.(it will remove itself and keeps the sensor from hitting the crankshaft)your best bet is go and buy a new sensor and look at it so you know what your looking for when trying to locate the old one the wiring harness will run along the top of the transmission follow that harness towards the firewall and it will lead you to the sensor.

REMOVAL & INSTALLATION 1983-86 Models

1. On 4-door sedan, remove the package tray and vent duct.
2. On hatchback, remove the speaker grilles.
3. Disconnect the brake line from the wheel cylinder. CAUTION
   Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with the eyes and wash your hands thoroughly after handling brake fluid. If you do get brake fluid in your eyes, flush your eyes with clean, running water for 15 minutes. If eye irritation persists, or if you have taken brake fluid internally, IMMEDIATELY seek medical assistance.
   
4. Remove the brake line from the brake hose.
5. Disconnect the brake hose from its bracket on the shock absorber.
6. Loosen, but do not remove, the nut holding the suspension support to the shock absorber.
7. Unbolt the shock absorber from the rear arm.
8. Unbolt and extract the shock absorber from the body. To install:
   
9. Attach the shock absorber to the body and tighten the 3 nuts to 17 ft. lbs. (25 Nm).
10. Engage the shock absorber bracket with the carrier and install the hardware. Tighten the nuts to 119 ft. lbs. (162 Nm).
11. Tighten the center suspension support nut to 36 ft. lbs. (49 Nm). There is a bearing located under the suspension support dust cover. Remove the dust cover and pack the bearing with multi-purpose grease. Once packed, reinstall the dust cover.
12. The remainder of installation is the reverse of removal. Tighten each component to specifications.
13. Have the rear wheel alignment checked.

1987-88 Models

1. On wagon models, remove the toneau cover holder.
2. Loosen the rear wheel lug nuts, raise the rear of the vehicle and support it safely. Block the front wheels.
3. Remove the rear wheels.
4. Using the proper size flare nut wrench, disconnect the backing plate hardware.
5. With a flare nut and a back-up wrench, disconnect the brake tube from the brake hose and use a small plastic container to collect the brake fluid.
6. Undo the clip and disconnect the brake hose from the shock absorber. NOTE: Before the axle bolts are removed, the axle carrier must be supported with a jack.
   
7. Support the axle carrier with a floor jack and remove the mounting bolts and nut. Disconnect the axle carrier from the shock absorber.
8. Support the shock absorber firmly by hand and remove the three mounting nuts. Remove the shock absorber from the body. To install:
   
9. Position the shock absorber onto the body and support it firmly by hand. Install the three nuts and tighten them to 23 ft. lbs. (31 Nm).
10. Attach the axle carrier to the shock absorber with the nuts and bolts. Tighten the nuts to 166 ft. lbs. (226 Nm).
11. The remainder of installation is the reverse of removal. Tighten each component to specifications.
12. Bleed the brake lines as described in Section 9.
13. Have the rear wheel alignment checked.

1989-96 Models

1. On the 4-door sedan, remove the package tray and vent duct. On 1992-96 models, it will be necessary to remove the rear seat back.
2. On the hatchback, remove the speaker grilles.
3. On the wagon models remove the tonnue cover and rear seat back.
4. Loosen the rear wheel lug nuts, raise the rear of the vehicle and support it safely. Block the front wheels.
5. Remove the rear wheels.
6. Disconnect the brake hose and the ABS speed sensor from the shock absorber.
7. If equipped with ABS, disconnect the Load Sensing Proportioning Valve (LSPV) spring from the lower arm.
8. Disconnect the stabilizer bar link from the shock absorber.
9. Support the rear axle and loosen the 2 bolts from the lower end of the shock absorber.
10. From inside the vehicle, unbolt the upper support. Fig. 1: A rubber cap covers the rear shock absorber tower nut
    Fig. 2: The upper shock absorber tower is retained by the center nut (circled) and three surrounding nuts
    
    
11. Lower the rear axle carrier and remove the two bolts.
12. Remove the shock absorber from the vehicle. To install:
    
13. Install the shock absorber assembly onto the vehicle.
14. Connect the brake hose and the ABS speed sensor to the shock absorber.
15. Connect the stabilizer bar link to the shock absorber.
16. Install the wheel and tire assembly.
17. During installation, please observe the following tighten specifications:
    1. Tighten the shock absorber-to-body bolts to 29 ft. lbs. (39 Nm).
    2. Tighten the shock absorber-to-axle carrier nuts to 166 ft. lbs. (226 Nm) on 1988-91 vehicles and 188 ft. lbs. (255 Nm) on 1992-96 vehicles.
    3. Tighten the suspension support-to-shock absorber nut to 36 ft. lbs. (49 Nm) on 1988-91 vehicles. On 1992-96 models, tighten the stabilizer bar link to shock absorber retainers to 47 ft. lbs. (64 Nm).
18. Install the rear seat back, vent duct and the package tray as required.

The struts model (MacPherson Strut),are both in front and back of this car.
2000 - 2006 Hyundai Elantra Shock Absorber and Strut Assembly - Rear, Driver Side, KYB GR-2/EXCEL-G, Twin tube, Strut Assembly. $72
2000 - 2006 Hyundai Elantra Shock Absorber and Strut Assembly - Rear, Passenger Side, KYB GR-2/EXCEL-G, Twin tube, Strut Assembly $68
1996 - 2006 Hyundai Elantra Shock Absorber and Strut Assembly - Front, Driver Side, KYB GR-2/EXCEL-G, Twin tube, Strut Assembly $67
1996 - 2006 Hyundai Elantra Shock Absorber and Strut Assembly - Front, Passenger Side, KYB GR-2/EXCEL-G, Twin tube, Strut Assembly $63
Of course this is only the cartridge, you have to transfer the spring, and the top mount of the existing strut. You need a pair of coil spring compressor to do the job. The basic procedure to replace a strut is:
Remove the top nuts that secure the strut assembly to the frame mount inside the engine compartment. Do not remove the center nut.
Mark the lower strut mounting location on the hub for installation reference. The alignment will be close if the new strut is installed in the same position.
Remove the bolts that hold the strut assembly to the hub.
Remove the strut assembly from the vehicle.
Mark the top mount for installation reference. Using a side mounted spring compressor, compress the spring and remove the top nut and retaining washer. Pull strut assembly out from the bottom of spring.
Slide the new strut assembly up into the spring and reposition the top mount onto the spring in the same position that it was removed. Install the retaining washer and top nut.
Tighten the top nut to the manufacturer's specifications and carefully remove the spring compressor.
Place the strut assembly back into the vehicle.

Answer
REMOVAL - SHOCK ASSEMBLY
NOTE: Access for the nuts attaching the rear shock assembly upper mount to the vehicle is through the inside of the trunk.

Roll back carpeting on top of the rear shock tower to access shock mounting nuts.
Remove plastic cover from the top of the shock assembly.
Remove 2 nuts attaching the shock assembly upper mount/spring seat to the shock tower.
Raise vehicle on jackstands or centered on a frame contact type hoist. (Refer to LUBRICATION & MAINTENANCE/HOISTING - STANDARD PROCEDURE)
Remove the rear wheel and tire assembly from the vehicle.
Remove two fasteners holding the splash shield to the shock assembly upper mount.
Remove bolt attaching shock absorber to rear knuckle (Shock Absorber Attachment To Knuckle).
Remove the shock absorber from the rear knuckle first when removing the shock absorber from vehicle by pushing down on the rear suspension.
Move shock assembly downward and tilt top of shock outward, then remove shock assembly from vehicle through top of wheel opening

When the strut was removed, the wire from the harness to the wheel speed sensor was not removed, and it was broken. An easy omission, for those without knowledge of the existance of wire.

It costs about $192.00 to replace the sensor..

height sensor is a sensor that control air compressor on air shock.it keep vechicle level.if height sensor senses distance between frame and suspension .it will admit air to shock by controling the air compressor.check the air shock on driver side.BESURE TO TURN OFF ELECTRICAL POWER TO AIR SUSPENSION BEFORE RAISING VECHICLE.

bank 1 refers to your driver's side and bank 2 refers to your passanger side. sensor 1 is pre cat and sensor 2 is post cat. Your vehicle has a v-6 so bank 1 sensor 1 is on the drivers side before the catalytic converter. It will be on your exhaust pipe between your exhaust manifold and your catalytic converter.

Usually found either on thermostat housing or close by on the lintake manifold. Usually can be removed with a regular wrench.

they are simple to change however you will need a spring compressor.

1 jack car and use axle stands to support the car.
2 remove wheel
3 behind drum or disc break assembly you will see shock absorber assembly
5 remover lower but (it may be very tight due to corrosion and time).
6 undo top nut located in boot around the top of the wheel arch. This may require the removal of some interior trim.
7 compress spring using spring compressor (use device instructions as these vary from type to type)
8 Undo top nut on the shock absorber assembly, remover cap spring and other rubbers.

Reinstalling is basically the instructs in reverse.


Good luck!