2025 BMW M3 — fuel trims are positive at idle and improve with RPM

Start with the test that can prove you wrong. Loaded-suspension checks on the 2025 BMW M3 catch play that a wheels-hanging inspection misses. Don't erase codes until someone who can help has seen them. This is from a 2025 BMW M3 in San Diego. That's the whole play. Happens in gear, not in park, for what that's worth.

If it were in my driveway, get a real battery/charging test on the 2025 BMW M3, not just resting voltage, before blaming a module. Save the big job until that test fails. Take it or leave it — that's what I'd do. Not trying to scare you — just skip the expensive first guess. Happens in gear, not in park, for what that's worth.

Log the conditions before you spend. If a shop can't duplicate it on the 2025 BMW M3, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. On “fuel trims are positive at idle and,” that was the fork that mattered for me. I'd want a dollar figure or a measured spec, not 'should be fine.' I already checked the easy fluid levels.