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      03-14-2026, 04:54 PM   #1
Hellboy550i
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Drives: BMW 550i
Join Date: Sep 2022
Location: atlanta

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60k milage and symptoms of hydrolocked car

Hi

my F10 550i LCI is 60k now and it is throwing some symptoms for the past 6 months and am kind of worried it might end up in expensive repairs. but for now eveything is fine and its drives, please let me know how bad it is so i can be preventive.

the car was hydrolocked on 45k miles and the mechanic shop fixed it by cleaning intake manifold , sparkplugs , airfilter change. also the engine mount ,GUIBO, one side High pressure fuel pump is changed at 50k.

1.) when i do a cold start the car vibrates a lot especially on 2k rpm and rough idling and i can feel it in driver seat.
2.) while coming to a stop the car races a little bit to lose the gear.
3.) in sports mode i am seeing mild jerks while gear shifting.
4.) accelerate reset is done , after that it works smooth for a while and then its comes back to a jerky reaction.
5.) if the car is in optimal temperature it behaves fine.
Appreciate 0