2023 Toyota 4Runner — coolant is old by age but mileage is low

I'd want a measurement, not a hunch. If a shop can't duplicate it on the 2023 Toyota 4Runner, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Time, temperature, and whether it's in gear are the notes that actually help a shop. Not trying to scare you — just skip the expensive first guess. If this is nothing, great. I want that in data.

This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2023 Toyota 4Runner, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Stop there until you know. Checking again after work.

If it were in my driveway, a pressure test beats staring at a dry driveway if the 2023 Toyota 4Runner is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. That's the sequence I'd use. Not trying to scare you — just skip the expensive first guess. Next check is the cheap one I can do in a driveway.

Ask what changed right before it started. Loaded-suspension checks on the 2023 Toyota 4Runner catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. If it doesn't change the out-the-door or the repair estimate, it's noise. This is me being the wet blanket on purpose.

Intermittent stuff lies if you only catch it once. If a shop can't duplicate it on the 2023 Toyota 4Runner, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. On “coolant is old by age but mileage,” that was the fork that mattered for me. Did the worksheet show tax yet? I keep a notes app thread for this now.

I wouldn't throw parts yet. Swap the cheap/easy piece first on the 2023 Toyota 4Runner and see if the fault moves. Don't erase codes until someone who can help has seen them. Run the total, not the monthly, before you commit. Video is ugly but it shows the hesitation.