We were advised to replace an ignition coil, but the labor charge is $480.00!

Cost is excessive. Do you have the code stored, P0301 is misfire cylinder 1, P0302 is misfire cylinder 2, P0303 is misfire cylinder 3 and so on. Check this link for the firing order of your vehicle, http://www.wellsve.com/custom_searches/ds_firing.php or there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online Look at napa auto parts or www.rockauto.com for the coil. A scan tool will be needed to turn of the check engine light.

I agree with Pat. We charge 2.1 hours to replace the back coils and the coils are about 69 per. Roy