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The brake warning light won't go off after the emergency brake was applied, even when the brake is off. How to fix?
Recommendion is about 75,000 but 100,000 is probably pretty safe to risk. Mine went to 225,000 before it snapped at a very low speed. If you travel mostly in-city, you can risk it more than long distance driving. If you have insurance tow services that may be limited to 15 miles or so without extra charge, it depends on your situation, and if you want to economize or pay for added security with extra preventative care.
Tune up parts (distributor cap, rotor, and platinum plugs) and labor should be about $100-$125, including parts ($45 est.). If you replace the spark plug wires (every 100,000 miles is a must) it'll run about $65 extra (wires are $40-$45 plus labor). Guess this could be 25% higher in northern states. Don't ask a dealer to do this, unless you do want to donate an extra $400 for nothing. Timing belts are needed every 100,000 or so miles to be safe. Assume yours has never been replaced. You can take a chance and not replace it and let it break whenever. Mine lasted til 225,000 miles before it snapped. Tow job was free, and paid $125 to replace in 2007.