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Engine & cooling

2021 Chrysler 300 Engine problems

Owners have filed 4 complaints about the 2021 Chrysler 300's engine & cooling with NHTSA - 19% of all its complaints, most recently on May 19, 2025. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.

Complaints
4
Recalls
0
Crashes
0
Fires
0
Injuries
0
Deaths
0

Engine complaints

Seats & seat beltsAcceleration & cruise controlEngine & cooling

Chrysler 300 2021 Vehicle keeps stalling, turning off while driving or if stopped at light or stop sign to loan just shuts random times and not Al way but enough to be dangerous when it stalls on freeway or in traffic Seat belt Driver seat belt just broke, split in half- safety issue. They replaced it but the metal seems to cut the seat belt and it probably will happen again Safety recall on Takata airbag, after replaced-air conditioning stopped working very concerning

Filed Incident Seat belts · Vehicle speed control · EngineNHTSA 11661766
Engine & cooling

Vehicle manufactured 12/2021. Purchased NEW 5/28/2022. Slight oil consumption between changes. Noticed engine had rough idle similar to misfire August 2024 shortly after an oil change@24,272 mi. NOTE Check Engine light did NOT appear. Car taken to dealership on 10/9/2024 with complaint of rough idle and diagnosed. Service Record states: diagnosed pending multi-cylinder misfire - valvetrain is slightly noisy - removed both valve covers to find Cylinders 1,4,5,6 have ROCKER ARMS WITH NEEDLE BEARING FAILURE (emphasis...

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mine) - no cam damage-replaced all rockers on both sides-complete. Part# 5184296-AH: ARM VALVE (09043001), Qty 24 + 2 gaskets. Service report does NOT note if lifter or other parts were inspected. Repair conducted 10/15/2024@26,039 miles. Asked at pick up OIL WAS NOT CHANGED AFTER REPAIR - TOLD NOT NECESSARY. Returned for follow up testing for rough idle (same as before rocker arm repair) and requested oil change on 12/3/2024@27,279 mi to remove potential metal shavings. Service Report states: diagnosed and observed engine while idling - no roughness in idle - all mounts good. Requested inspected by FCA Factory Tech. Service advisor promised and after a follow up call refused to arrange for Factory Tech inspection. Taken to another dealership on 2/24/2025 at 29,215 miles. Was aware of previous repair. No diagnosis performed. Service report: found vehicle to operate as designed - no problem found. Refused to arrange Factory Tech inspection. Vehicle continues to have rough idle due to misfire and makes ticking noise on both sides which can be heard in cabin. Problem was not fixed properly or other parts need replacement. FCA refuses further inspection. No oil pressure, particulate or consumption testing conducted. No lifter inspection conducted. Oil sample sent for lab for testing (metal ppm). Customer Service would send to case manager. Filed NCDS case and discussions with attorney. Reduced performance. Engine will not last. FCA needs to buy back.

Filed Incident EngineNHTSA 11649935
Engine & cooling

Vehicle manufactured 12/2021. Purchased NEW 5/28/2022. Slight oil consumption between changes. Noticed engine had rough idle similar to misfire August 2024 shortly after an oil change@24,272 mi. NOTE Check Engine light did NOT appear. Car taken to dealership on 10/9/2024 with complaint of rough idle and diagnosed. Service Record states: diagnosed pending multi-cylinder misfire - valvetrain is slightly noisy - removed both valve covers to find Cylinders 1,4,5,6 have ROCKER ARMS WITH NEEDLE BEARING FAILURE (emphasis...

Read the full complaint

mine) - no cam damage-replaced all rockers on both sides-complete. Part# 5184296-AH: ARM VALVE (09043001), Qty 24 + 2 gaskets. Service report does NOT note if lifter or other parts were inspected. Repair conducted 10/15/2024@26,039 miles. Asked at pick up OIL WAS NOT CHANGED AFTER REPAIR - TOLD NOT NECESSARY. Returned for follow up testing for rough idle (same as before rocker arm repair) and requested oil change on 12/3/2024@27,279 mi to remove potential metal shavings. Service Report states: diagnosed and observed engine while idling - no roughness in idle - all mounts good. Requested inspected by FCA Factory Tech. Service advisor promised and after a follow up call refused to arrange for Factory Tech inspection. Taken to another dealership on 2/24/2025 at 29,215 miles. Was aware of previous repair. No diagnosis performed. Service report: found vehicle to operate as designed - no problem found. Refused to arrange Factory Tech inspection. Vehicle continues to have rough idle due to misfire and makes ticking noise on both sides which can be heard in cabin. Problem was not fixed properly or other parts need replacement. FCA refuses further inspection. No oil pressure, particulate or consumption testing conducted. No lifter inspection conducted. Oil sample sent for lab for testing (metal ppm). Customer Service would send to case manager. Filed NCDS case and discussions with attorney. Reduced performance. Engine will not last. FCA needs to buy back.

Filed Incident EngineNHTSA 11649843
Engine & cooling

My car turns off periodically while I'm driving and when I'm stopped at a light. This is random, so I didn't even go on freeways from fear the car will stop suddenly in heavy traffic and I be killed or injured badly I have taken it to the dealer and they keep saying nothing is wrong, last time they kept car for 3 days and said nothing found. I fear for my life, don't even want to drive the vehicle anymore . It's happened for the last months I strongly feel,they were waiting for my warranty to expire so they kept saying nothing wrong

Filed Incident Unknown or other · EngineNHTSA 11648218

Chrysler 300 engine complaints by year

300 engine problems, every year

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