# 2004 Mazda Mazda3 - Oil in the plugs

**URL:** <https://community.cartalk.com/t/2004-mazda-mazda3-oil-in-the-plugs/197688>\
**Category:** Maintenance/Repairs\
**Tags:** mazda\
**Created:** [October 20, 2024, 8:25pm UTC](https://community.cartalk.com/t/2004-mazda-mazda3-oil-in-the-plugs/197688 "2024-10-20T20:25:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gluna35](https://avatars.discourse-cdn.com/v4/letter/g/45deac/32.png) [@gluna35](https://community.cartalk.com/u/gluna35)\
**Post date:** [October 20, 2024, 8:25pm UTC](https://community.cartalk.com/t/2004-mazda-mazda3-oil-in-the-plugs/197688/1 "2024-10-20T20:25:37Z")

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mazda 3, 2004 there’s leaking oil in the spark plugs, might be the valve cover gasket. Car is shaky on idle, and during acceleration. recovers when running at constant velocity

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**Author:** ![davesmopar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/davesmopar/32/41750_2.png) [@davesmopar](https://community.cartalk.com/u/davesmopar)\
**Post date:** [October 20, 2024, 10:26pm UTC](https://community.cartalk.com/t/2004-mazda-mazda3-oil-in-the-plugs/197688/2 "2024-10-20T22:26:52Z")

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> [@gluna35](#):
>
> mazda 3, 2004 there’s leaking oil in the spark plugs, might be the valve cover gasket. Car is shaky on idle, and during acceleration. recovers when running at constant velocity

Welcome to the forum…

Is the check engine light (CEL/MIL) on??  
What are the codes??

If oil is leaking down into the spark plug tubes, then the tube seals require replacing (valve cover gasket set)…  
You may also need to replace the COP (coil on plug) boots…

Depending on the misfire and codes, New OEM spark plugs and maybe a coil(s) will be required also…