Kia Troubleshooting Questions? Ask a Mechanic
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Sometimes you can find good used ABS modules on e-bay for around $350. Labor should not exceed 2.5 hrs. So, if we look at labor being about $120/hr, we'd have a grand total of $710 plus taxes - far less than what you were quoted for parts alone.
Don't hesitate to shop around. There are many good independent mechanics out there that will do this job for you.