There may be an intermittent three- to five-second delay between when you turn the key and when the engine actually cranks. If the Check Engine Light illuminates, have the brake switch inspected. Otherwise, simply update the PCM software.
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Most reported Dodge Magnum problems
"False" trouble codes may cause erroneous illumination of the Check Engine Light. Updating the PCM software can often correct this concern.
Water may leak into the transmission from the dipstick tube, causing fluid contamination and a shudder during light acceleration. New seals for the dipstick tube are available; the transmission fluid should be flushed as well. If the problem lingers, a new torque converter may be needed.
The sunroof would not close completely flush with the roof of the vehicle causing a loud wind noise. I found a related TSB and it recommended pulling a fuse while the sunroof is opening, replacing the fuse and proceeding to open and close the sunroof. Worked for me!
A whine type noise may develop form the engine area when the car is idling (typically in warmer temperatures, after the engine has warmed up). It's possible that the noise may be from the engine oil system and is harmless. Still, have a technician verify that the noise is nothing to worry about.