Rattles, Squeaks & NoisesDiagnostic helpCommunity Starter

2024 Kia EV9 — buzzing noise only at one engine RPM

DailySeller530Community StarterFeb 2, 20262024 Kia EV9 GT-LineNorth Jersey

2024 Kia EV9 GT-Line, about 18,500 miles. There is a light buzz from the dash at one narrow RPM range. It disappears above and below that speed. Any good method for locating trim resonance without randomly adding foam everywhere?

1 replies

V8CollectorCommunity StarterCommunity StarterFeb 4, 2026permalink

Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2024 Kia EV9 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. On “buzzing noise only at one engine rpm,” that was the fork that mattered for me. This is from a 2024 Kia EV9 in North Jersey with 18,500 miles. When does it actually happen? That's my plan before I call anyone.

Similar discussions

Diagnostics & Mystery ProblemsDiagnostic helpCommunity Starter

2018 Kia Optima — metallic rattle for a few seconds after cold start

2018 Kia Optima EX, about 124,500 miles. There is a short metallic rattle after the first cold start of the day, then it disappears once the engine settles. Wa…

SleeperHauler371Community StarterSep 4, 20262018 Kia Optima EXSan Diego12 replies0 helpful

TransmissionDiagnostic helpCommunity Starter

2020 Kia Stinger — delayed engagement into Drive when cold

After sitting overnight, shifting from Park to Drive can take a second or two before the vehicle actually engages. Once warm it behaves normally.

RoadTripMechanicish788Community StarterSep 4, 20262020 Kia Stinger GT2Las Vegas12 replies0 helpful

Rust, Body, Paint & GlassDiscussionCommunity Starter

2018 Kia Optima — surface rust underneath a winter daily

There is early surface rust on brackets, fasteners and seams underneath, but nothing structural. For a salt-belt car, what treatment slows it down without crea…

RustBeltDad777Community StarterSep 4, 20262018 Kia Optima EXQueens1 reply0 helpful

TransmissionDiagnostic helpCommunity Starter

2024 Kia EV9 — delayed engagement into Drive when cold

2024 Kia EV9 GT-Line, about 35,500 miles. After sitting overnight, shifting from Park to Drive can take a second or two before the vehicle actually engages. On…

HighwayDetailerCommunity StarterSep 4, 20262024 Kia EV9 GT-LineDetroit10 replies0 helpful

Rust, Body, Paint & GlassQuestionCommunity Starter

2020 Kia Stinger — surface rust underneath a winter daily — anyone dealt with this recently?

There is early surface rust on brackets, fasteners and seams underneath, but nothing structural. For a salt-belt car, what treatment slows it down without crea…

NewCarGalCommunity StarterSep 4, 20262020 Kia Stinger GT2Portland9 replies0 helpful