Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Chrysler 300 LXFACTORY OEM SERVICE PROCEDURE
Spark Plug: Removal: 3.5L
- Remove engine cover.
- Disconnect and isolate the negative battery cable.
- Remove the intake manifold. Refer to REMOVAL .
- Unlock and disconnect electrical connector (2) from ignition coils.
- Remove mounting bolts and engine cover studs (1).
- Twist, lift and remove ignition coil from engine.CAUTION: Prior to removing the spark plugs, use compressed air to remove any accumulated dirt and debris. If dirt and debris enter the engine, this may cause internal engine damage.
- Remove spark plug using a quality socket with a rubber or foam insert.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.