Answered from the manual for the 2023 Honda Civic.
B12 at 15% means: replace engine oil and oil filter; rotate the tires; replace the engine air cleaner and cabin dust/pollen filter; inspect the drive belt; inspect the brakes and the other B-service chassis/fluid/exhaust items. The Minder begins displaying messages when oil life is below 15%.
- A: Replace engine oil.
- B: Replace engine oil and filter; inspect front/rear brakes, steering/suspension/driveshaft boots, brake hoses and lines, fluid levels/condition, exhaust, and fuel lines/connections. On your Auto Idle Stop-equipped EX, that is the applicable B list.
- 1: Rotate tires.
- 2: Replace engine air cleaner element and dust/pollen (cabin) filter; inspect drive belt.
- 3: Replace transmission fluid—on your CVT Civic, this is CVT fluid.
- 4: Replace spark plugs and inspect valve clearance.
- 5: Replace engine coolant.
- 6: No Maintenance Minder sub-item 6 is listed in the 2023 Civic manual.
- 7: Replace brake fluid.
Examples: A1 = oil change plus tire rotation. B12 = B service plus items 1 and 2. B13 = B service plus tire rotation and CVT-fluid replacement.
The manual calls for air and cabin-filter replacement every 15,000 miles (24,000 km) in dusty or high-soot urban conditions, respectively. If a brake-fluid item 7 does not appear within 36 months after reset, change it every 3 years. For regular very-low-speed mountain driving, Honda calls for CVT-fluid changes every 25,000 miles (40,000 km).
Not from the manual: Typical U.S. pricing is roughly $70–$130 dealer / $50–$100 independent for A1, and $200–$350 dealer / $140–$260 independent for B12, varying substantially by area and tire-rotation/filter pricing.
Reasonable DIY: oil/filter, engine air filter, cabin filter, and tire rotation if you have safe lifting equipment and a torque wrench. CVT fluid is best left to an experienced DIYer or shop because correct fluid level and Honda-specified fluid matter. Brake-fluid flushing, coolant service, valve-clearance inspection, and the complete B inspection are better shop jobs for most owners. Reset only the individual Minder items you actually completed; the manual allows selecting each due item or “All due items.”
Sources
- Honda Civic 2023 - Owner's Manual
- Honda Civic 2023 - Owner's Manual
Comments
great question