is that what the other mechanic told you??
try and find a forum for your car. or google your 'year/make/model lower outer bushings' and that'll give you a good idea of what you should be paying, and how hard the job is to do yourself... maybe even inspire you to do it yourself for much lower cost. cause you'll probably find a DIY.
we did my brothers BMW rear trailing arm bushings, both of them, for $50. using better aftermarket parts that were found through a forum.
I'd shop around. There is actually a site where you can put the make of your car and repair in and see around what it should cost.
http://www.automd.com/repaircost/
How can anyone comment on this without knowing what kind of car?
Some cars need the bushings pressed out, some need the whole control arm replaced, some require alignment after repair. Control arm can mean a few things, from compression rod to the actual control arm. Some replacement requires replacement of the ball joint as well.
www.repairpal.com
Get legit independent advice. While there are some sharp guys on car forums, there are also some bonafied retards.
Lastly, just ask your mechanic. He said 4.5 hours labor, that's standard for many cars. He already operating with some transparency, ask him every question you can think of. Then, if you trust him and the price seems decent, do the work. Trust is worth something.
Research it on your own. Take anything you read on a forum (automobile enthusiast particularly) with a grain of salt. Lotta terrible advice to be had out there.
like everyone said, buy the parts urself and have them install it. tell them you want to watch them for all 5 hours.
Is there another name for bushings? cant seem to find it in your link or the other one?
Its a 2007 Hyundai Sonata V6
What kind of car?
They are sometimes called compliance bushings.