All this info can be found in your owners manual. Its good stuff.
1) It depends if you plan on going somewhere that requires them.
2)Front tires only.
3)SAE Class ‘‘S’’ cable-type traction devices, with rubber chain tensioners
4)You need to engage VTM. VSA is what kicks in.
*Copied from the manual.*
Because your vehicle has limited clearance, mount only SAE Class ‘‘S’’ cable-type traction devices, with rubber chain tensioners on the front tires. Use traction devices only when
required by driving conditions or local laws. Make sure they are the correct size for your tires. Metal linktype ‘‘chains’’ should not be used. When installing cables, follow the manufacturer’s instructions, and mount them as tight as you can. Make sure they are not contacting the brake lines or suspension. Drive slowly with them installed. If you hear them coming into contact with the body or chassis, stop and investigate. Remove them as soon as you begin driving on cleared roads.
The Variable Torque Management 4WD System (VTM-4) automatically transfers varying amounts of engine torque to the rear wheels under lower traction conditions. If more traction is needed when your MDX is stuck, or is likely to become stuck, you can use the VTM-4 Lock button to increase torque to the rear
wheels. The vehicle must be stopped with the engine running.
Move the shift lever to First (1), Second (2), or Reverse (R) gear.
Press the VTM-4 Lock button. The light in the button will come
To get unstuck, apply light pressure to the accelerator pedal. Do not spin the front tires for more than a few seconds. Because of the amount of torque applied to the rear tires, they should not spin. This is normal. If you are not able to move the vehicle,
stop and reverse direction. do one of the following:
Press the VTM-4 Lock button.
Move the shift lever to D , D or D .
Turn the ignition switch to LOCK (0).
The VTM-4 Lock will temporarily disengage when the vehicle speed
exceeds 18 mph (30 km/h). It will automatically engage again as the speed slows below 18 mph (30km/h). The button light will remain on.
Do not use the VTM-4 Lock button on dry, paved roads. Driving on
dry, paved roads with VTM-4 Lock ON may damage the rear dif f erential when making a turn. Strange noise and vibration can also result. Do not continuously spin the front tires of your MDX. Continuously spinning the front tires can cause transmission or rear differential damage.
The Vehicle Stability Assist system helps to stabilize the vehicle during cornering if the vehicle turns more or less than desired. It also assists you in maintaining traction while accelerating on loose or slippery road surfaces. It does this by regulating the engine’s output, and by selectively applying the brakes.
When VSA activates, you may notice that the engine does not respond to the accelerator in the same way it does at other times.
The VSA system cannot enhance the vehicle’s driving stability in all
situations and does not control your vehicle’s entire braking system. It is still your responsibility to drive and corner at reasonable speeds and to leave a sufficient margin of safety.
Where do you plan on going?