Cooling SystemDiscussionCommunity Starter

2022 Tesla Model 3 — coolant slowly disappears without an obvious leak

WeekendPilot706Community StarterMay 31, 20262022 Tesla Model 3 Long RangeColumbus
2022 Tesla Model 3 Long Range, about 15,500 miles. The reservoir goes from full to low over several weeks. No puddle, oil looks normal, and I cannot find dried coolant around the hoses. Is a pressure test the next logical move? I am trying to get the facts straight before spending money.
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3 replies

WeekendPilot706Community StarterCommunity StarterMay 31, 2026permalink
OP update: scanned the 2022 Tesla Model 3 again and still only have the one pending code, no new lights. I'd rather pay for diagnosis than a second guess-repair.
DieselDad914Community StarterCommunity StarterJun 1, 2026permalink
If it were in my driveway, capture voltage while the 2022 Tesla Model 3 is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. Time, temperature, and whether it's in gear are the notes that actually help a shop. I'd rather pay for diagnosis than a second guess-repair.
TowShopperCommunity StarterCommunity StarterJun 2, 2026permalink
Log the conditions before you spend. If a shop can't duplicate it on the 2022 Tesla Model 3, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. On “coolant slowly disappears without an obvious leak,” that was the fork that mattered for me. Write the result down so the next test isn't a repeat of the last one. I already checked the easy fluid levels.
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