Q: How to service and repair the front Wheel Hub on 2007 Toyota Matrix?
A: The front wheel hub servicing process starts by uninstalling the front tire followed by caliper assembly separation and front disc removal. The front wheel hub bearing backlash needs dial indicator evaluation to confirm it stays under 0.05 mm (0.0020 in.); if it surpasses this threshold you should replace the bearing. The check of front wheel hub deviation against surface outside the hub bolt through dial indicator testing should lead to front wheel hub sub-assembly replacement when results exceed 0.05 mm (0.0020 in.). The front disc along with front disc brake caliper assembly and front wheel should be installed before wheel torque reaches 103 Nm (1,050 kgf/cm, 76 ft. lbs.). Detach the front wheel along with the front wheel hub LH nut before you can split the front stabilizer link assembly LH and front speed sensor LH and front disc brake caliper assembly LH by unfastening the 2 bolts. First remove the front disc then take off the tie rod end sub-assembly LH followed by the lower LH front suspension arm sub-assembly then proceed to separate the front wheel assembly LH using a plastic hammer with caution to avoid injuring the boot or ABS speed sensor rotor. First uninstall Special Service Tool: 09628-62011 from the lower ball joint assembly LH followed by using snap ring pliers to remove the LH hole snap ring. The worker should use Special Service Tool: 09520-00031 to remove the front wheel hub sub-assembly LH while using Special Service Tool: 09950-40011 (extension group: 09951-04020, 09952-04010, 09953-04030, 09954-04010, 09955-04061, 09957-04010, 09958-04011) together with Special Service Tool: 09950-60010, 09951-00370 to extract the hub LH bearing's inner race. Remove the front disc brake dust cover LH by removing its 3 bolts before you use Special Service Tools: 09527-17011, 09950-60010 (09951-00640), 09950-70010 (09951-07100) in combination with a press to detach the front wheel hub LH bearing. To install a new hub LH bearing on the steering knuckle users should follow the order of first using Special Service Tool: 09950-60020 (09951-00720) and 09950-70010 (09951-07100) and a press then torquing the dust cover bolts to 8.3 Nm (85 kgf/cm, 73 in. lbs). Install the hub sub-assembly LH using Special Service Tool: 09608-32010, 09950-60010 (09951-00600), 09950-70010 (09951-07100) and a press followed by installing a new LH hole snap ring with snap ring pliers. The lower ball joint assembly LH requires a new nut torqued to 103 Nm (1,050 kgf/cm, 76 ft. lbs.) while inserting a new cotter pin which should be aligned with the holes. The assembly of front wheel LH requires two bolts with nuts reaching 220 Nm (2,243 kgf/cm, 162 ft. lbs.) while avoiding drive shaft outboard joint boot and ABS speed sensor rotor damage. Proceed with the installation of lower LH front suspension arm sub-assembly, tie rod end sub-assembly LH, front stabilizer link assembly LH, front disc, and front disc brake caliper assembly LH while torquing caliper assembly bolts to 107 Nm (1,089 kgf/cm, 79 ft. lbs.). Place a new hub LH nut on the hub components using a socket wrench (30 mm) then torque it to 216 Nm (2,200 kgf/cm, 159 ft. lbs.). The hub LH nut requires additional staking by striking it with a chisel and hammer before installing the front wheel while torquing it to 103 Nm (1,050 kgf/cm, 76 ft. lbs.). The professional must check front wheel alignment while inspecting the ABS speed sensor signal for the Vehicle Stability Control System and Anti-lock Brake System.