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Did you try rotating the tires - could be a bent wheel that is making the bumping noise. After that - I'd look into the suspension, steering, and CV-joints/axles. Look for obvious issues - torn or ripped CV joint boots, damaged sway bar bushings, loose nuts on the strut assembly, worn ball joint, worn tie-rod ends, etc.
Did you leave the wheels on when you checked the wheel bearings? Best to keep the wheels mounted and that corner of the car jacked up in the air to put enough leverage on the bearing to see if it is bad or not. With the wheel off, be tough to put enough pressure on the bearing to check it.
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2002 Corolla S, 1.8L 1ZZ-FE VVT-i
2003 Matrix XRS, 1.8L 2ZZ-GE, VVTL-i (RIP)
2009 Matrix XRS, 2.4L 2AZ-FE VVT-i
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