Around $170.00
120000 miles with original iridium plugs.
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How do you change spark plugs in a 6 cly Toyota Camry?
For a 2001 Toyota Highlander, it's generally recommended to change the spark plugs every 30,000 to 100,000 miles, depending on the type of spark plugs used. If you're using standard copper spark plugs, aim for around 30,000 miles, while iridium or platinum plugs can last up to 100,000 miles. Always consult your owner’s manual for specific recommendations related to your vehicle's engine type and driving conditions. Regular maintenance checks can help determine the optimal replacement interval.
To change spark plugs on a 1994 Toyota Camry, remove the black shafts. The spark plugs are down the four holes. Use a socket set with extension to reach the spark plugs. Replace old spark plugs with new ones.
To change the spark plugs on a 2008 Toyota Highlander, first, ensure the engine is cool. Remove the engine cover if necessary, then disconnect the ignition coil connectors and unbolt the coils to access the spark plugs. Use a spark plug socket to carefully remove the old plugs and replace them with new ones, ensuring they are properly gapped. Reassemble by reinstalling the coils and connectors, and finally, replace the engine cover if applicable.
There is an article with video on how to change spark plugs at ; http://www.carbasics.co.uk Look in their 'how to' section.
Now would be a good time to do a tuneup.
Remove the old plugs, install new plugs.