CV Boots and CV Joints What Do They Look Like?

That clicking sound you hear when you turn left or right just might be your CV joints on your front wheel drive car.
Below is more info:

clipped from www.myhonestmechanic.com
Inner CV Boot/Joint — The inner cv boot
(where my finger is point to) is connected to the cv (constant velocity) shaft
which on the other end at the bottom of the picture is the out cv boot and
joint. The purpose of the soft rubber boot is to protect the joint from road
debris and keep the special lubricating grease inside the boot to lubricate the
joint. The boot has to be soft and flexible because as you turn the wheels the
boot stretches.
When the boot breaks the grease drips out and water and dirt
get inside the joint causing damage. A bad cv joint will usually make a clacking
noise on hard turns. it can sometimes be more economical to replace the entire
cv shaft (comes with inner and out cv joints and boots) with a rebuild unit than
it is to replace 1 bad cv joint.

CV boot closest to the
engine/transmission

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