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Q: How may a non-mechanic replace oxygen sensors on a Mazda MX/3? on 1993 Mazda MX-3

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My 1993 MX-3 failed the low idle hydrocarbons test at the DMV. Can anyone help me with this problem?
(I am unemployed and cannot afford the $800 estimate that a garage gave me to replace the spark plugs and the oxygen sensors. I was told they needed to be replaced due to oil leakage.)

Thank you, very much.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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FIRST THING to do BEFORE spending any mony on car is to educate yourself on the emissions laws!!!! Find out if they allow a 'waiver' if , after you spend a certain amount , it still doesn't pass emissions. Find out how they require the repairs to be 'documented' etc. DEQ , or DMV online in your state may have some info.
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