Honda B123 service: what’s included
A Honda B123 service is the B service plus three sub items: change the engine oil and oil filter, inspect the car, rotate the tires (1), replace the engine air filter and the cabin air filter (2), and replace the transmission fluid (3). It is one of the larger visits the Maintenance Minder asks for, because it combines the jobs of a B12 and a B13.
On this page (7 sections)
What a B123 service includes
| Part of the code | Job | Type of work |
|---|---|---|
| B | Engine oil and oil filter | Replace |
| B | Brakes, steering, suspension, driveshaft boots, brake lines, exhaust, fuel lines, all fluids | Inspect |
| 1 | Tires | Rotate |
| 2 | Engine air filter (air cleaner element) and cabin air filter (dust and pollen filter) | Replace |
| 2 (many models) | Drive belt | Inspect |
| 3 | Transmission fluid; on some all-wheel-drive models, also transfer fluid | Replace |
From the 2022 CR-V and 2022 Pilot Maintenance Minder pages and the 2025 Civic Hatchback Hybrid owner’s manual. Check your manual: the list differs by model.
Why three items come up at once
Honda’s manuals describe the codes as the items that should be serviced at the same time as the next oil change. So when the filters and the transmission fluid are both due by that oil change, they appear together in one code. The visit is bigger, but you make one trip instead of two.
It can also mean the filters are due early. Honda gives a fixed interval of 15,000 miles for the engine air filter in dusty conditions and for the cabin filter in areas with heavy soot. If you drive in those places, item 2 may be part of your routine anyway.
How much a B123 service costs
There is no set price. Break the estimate into lines, and the price becomes easier to check:
| Line on the estimate | Published price or what to ask |
|---|---|
| Oil and oil filter | About $64 conventional to $118 full synthetic (AAA shop survey, scaled to late 2026) |
| Tire rotation | About $45–$75 (Consumer Reports); often free with an oil change |
| Two air filters | No national figure we could verify: part prices for your model plus labor |
| Transmission fluid | No national figure we could verify: the fluid named in your manual, the quarts, and the labor |
| Rough total of the published lines | About $109–$193, before the filters and the transmission fluid |
A rough guide built from the figures on our oil change and tire rotation pages, checked November 2026. Not a quote: labor rates, your engine, and your transmission change the total.
The transmission fluid is usually the largest of the open lines. If the total looks high, ask which line makes up most of it.
Where you can save
- Do the filters yourself. On many Hondas both filters come out without special tools. Your manual shows how. See engine air filter and cabin air filter replacement.
- Compare the fluid line. Ask two shops for the transmission fluid line in writing, with the fluid name and the method. See transmission fluid change.
- Skip the extras. An engine flush, a fuel system cleaning, or a throttle body service is not part of B123.
What to write down
- Date, odometer, and the code (B123)
- Oil grade, amount, and filter part number
- Both air filter part numbers, and who replaced them
- Transmission fluid name, quarts, and method
- The price of each line
Three intervals restart at once here, so a clear record now saves guesswork later. Use a car maintenance log. Every code is on the Honda maintenance codes chart.
FAQ
What does B123 mean on a Honda?
The B service (new oil and filter, plus an inspection), a tire rotation (1), new engine and cabin air filters (2), and new transmission fluid (3). Read each digit as its own job.
How much does a Honda B123 service cost?
The oil, filter, and rotation come to about $109 to $193 at typical published prices. The two air filters and the transmission fluid come on top and depend on your model. Ask for a written estimate with each line priced.
Can I do part of a B123 service now and the rest later?
Honda lists the items to be done with this oil change, so plan to do them together. If you do the filters yourself later, reset only the items you finished, and the rest stay on the display. See how to reset Honda oil life.
Milealot is an independent site, not affiliated with or endorsed by American Honda Motor Co. Honda and Maintenance Minder are trademarks of their owner and are used here only to name the system.
Sources
- Honda, 2022 CR-V owner’s manual, Maintenance Minder pages (B list, sub items 1–3, 15,000-mile filter rules, items serviced with the oil change, reset by item) (checked November 12, 2026): owners.honda.com
- Honda, 2022 Pilot owner’s manual, Maintenance Minder pages (drive belt under item 2; transmission and transfer fluid under item 3) (checked November 12, 2026): owners.honda.com
- Honda, 2025 Civic Hatchback Hybrid owner’s manual, “To Use Maintenance Minder” (sub items 1–3; archived copy, checked November 12, 2026): techinfo.honda.com (archived)
- AAA, Synthetic vs. conventional engine oil, research report, 2017 (shop survey: typical oil change $38 conventional, $70 synthetic): ace.aaa.com
- U.S. Bureau of Labor Statistics, CPI for all urban consumers, motor vehicle maintenance and servicing (series CUUR0000SETD; June 2017 to October 2026, about +69%) (checked November 12, 2026): data.bls.gov
- Consumer Reports, Your car maintenance checklist (tire rotation about $45–$75; updated May 6, 2026; checked November 12, 2026): consumerreports.org