The rider sustained multiple injuries including two broken ribs, a broken finger, a cut to her leg which required stitches, multiple deep abrasions to her arm and bruising.
She is scheduled to have plastic surgery on her arm and surgery on her hand at Christchurch Hospital today.
Police are appealing for the driver or anyone who has seen a dark blue Mazda Millenia that is missing a nearside wing mirror or has damaged to the front nearside of the vehicle to contact them on 03 347 9248.