2018 Infiniti Q50 — single clunk over small sharp bumps

I went back under the 2018 Infiniti Q50 and it only happens after a heat soak, not on a cold start. If the story changes I'll post the new data.

Log the conditions before you spend. Loaded-suspension checks on the 2018 Infiniti Q50 catch play that a wheels-hanging inspection misses. You'll know quickly if you're on the wrong tree. On “single clunk over small sharp bumps,” that was the fork that mattered for me. Not gospel, but it saved me a headache. Next check is the cheap one I can do in a driveway.

OP here — recorded a short video and noted speed, temp, and whether it was in gear. I'll poke at it this weekend.

If it were in my driveway, swap the cheap/easy piece first on the 2018 Infiniti Q50 and see if the fault moves. If the cheap test changes it, stop and reassess. Do that first. I'd rather be boring and correct. Doing the boring step first on purpose.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2018 Infiniti Q50 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. That's the whole play. No warning lights, which is why I'm documenting it.

Intermittent stuff lies if you only catch it once. Capture voltage while the 2018 Infiniti Q50 is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. On “single clunk over small sharp bumps,” that was the fork that mattered for me. That's the sequence I'd use. Heat soak after errands is the other window.

I wouldn't throw parts yet. Capture voltage while the 2018 Infiniti Q50 is actually failing — after it restarts you've lost the clue. If the cheap test changes it, stop and reassess. This is from a 2018 Infiniti Q50 in Boston. Post the numbers (or the code) and people can get more specific. Parking it somewhere I can hear it better next time.

Tried a second charger / second scan and the story on the 2018 Infiniti Q50 didn't change. That's my plan before I call anyone.

I'd want a measurement, not a hunch. Get a real battery/charging test on the 2018 Infiniti Q50, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. That's the sequence I'd use. No warning lights, which is why I'm documenting it.