Chrysler 300 2021 Owner's Manual page 233

Mileage or time passed (whichever comes first)
Or Years:
Or Kilometers:
Change the transfer case fluid; if using your vehicle for any of
the following: police, taxi, fleet, off-road, or frequent trailer
towing. (All Wheel Drive Only).
Change the rear axle fluid and on models equipped with All
Wheel Drive (AWD) change the front axle fluid if using your
vehicle for any of the following: police, taxi, fleet, off-road, or
frequent trailer towing.
Inspect and replace PCV valve if necessary.
1. The spark plug change interval is mileage based only, yearly intervals do not apply.
You can be badly injured working on or around a motor vehicle. Do only service work for which you have the knowledge and the right equipment.
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If you have any doubt about your ability to perform a service job, take your vehicle to a competent mechanic.
Failure to properly inspect and maintain your vehicle could result in a component malfunction and effect vehicle handling and performance. This

could cause an accident.
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SERVICING AND MAINTENANCE
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