The B12 Acura maintenance code represents an oil and filter change, a vehicle inspection, a tire rotation, an engine plus cabin air filter replacement, and a drive belt inspection. The “B” stands for an oil and filter change with vehicle inspection, the “1” stands for a tire rotation, and the “2” stands for an engine and cabin filter replacement with drive belt inspection.
The B12 service is similar to the B1 service but it adds engine and cabin filter replacement and drive belt inspection. It is typically performed by a Acura dealership or with a local mechanic but it can also be performed by at home without needing special tools.
Acura B12 Maintenance Minder Description
The Acura maintenance minder code sheet above lists all the main and sub service items with B12 highlighted.
“B” Main Service Item
Acura describes the “B” service as an engine oil and filter change with a vehicle inspection. The parts included in the Acura vehicle inspection are:
- Front and rear brakes
- Tie rod ends, steering gearbox, and boots
- Suspension components
- Driveshaft boots
- Brake hoses and lines (including ABS/VSA)
- All fluid levels and condition of fluids
- Exhaust system
- Fuel lines and connections
“1” Sub Service Item
Acura describes the “1” service as a tire rotation. In addition to rotating the tires, dealerships will also check the tire pressure and treads for wear or punctures.
“2” Sub Service Item
Acura describes the “2” service as an engine air filter replacement, cabin air filter replacement, and drive belt inspection.
Acura B12 Service Cost
The B12 service typically costs $220 to $375. The cost will depend on the specific Acura vehicle you have and the labor cost rate.
| Item | What it covers | Typical cost |
|---|---|---|
| “B” | Oil and filter change, plus multi-point inspection | $90 – $180 |
| “1” | Tire rotation | $30 – $45 |
| “2” | Engine and cabin air filters, drive belt inspection | $100 – $150 |
| Total Acura B12 service | $220 – $375 | |
| Doing it yourself (parts only) | around $70 | |
For maintenance services like the B12, most dealerships and 3rd party auto shops offer coupons and discounts. We suggest calling several locations beforehand to get the best deals.
“B” Service Cost
The “B” service, an oil and filter change with a multi-point inspection, typically costs $90 to $180 depending on the Acura model you have. It is a 30 to 40-minute service with the cost mostly from the parts. Some Acura vehicles, like the 2022 MDX, require synthetic oil which is more expensive.
RepairPal offers a “B” service (oil change and inspection) cost estimate for your vehicle and location but it is separated into two estimators:
Oil Change Estimator: https://repairpal.com/estimator/oil-change-cost
Vehicle Inspection Estimator: https://repairpal.com/estimator/pre-purchase-car-inspection-cost
“1” Service Cost
The “1” service, or tire rotation, typically costs $30 to $45. The tire rotation takes about 15 minutes of labor time. However, we suggest calling your Acura dealership or 3rd party auto repair shop for exact quotes.
RepairPal also offers a “1” service (tire rotation) cost estimate for your vehicle and location:
https://repairpal.com/estimator/tire-rotation-cost
“2” Service Cost
The “2” service is an engine and air filter replacement with a drive belt inspection and typically costs $100 to $150. The whole service takes about 45 minutes of labor time. However, we suggest calling your Acura dealership or 3rd party auto repair shop for exact quotes.
RepairPal also offers estimators for the engine and air filter replacement part of the “2” service:
Engine Air Filter Replacement Estimator
Cabin Air Filter Replacement
Acura B12 DIY Cost
Want to save money or prefer to rely on yourself for your Acura’s maintenance? Performing a B12 service yourself will cost around $70 to $200 depending on the part brands and oil type you use.
We suggest using Acura parts or any aftermarket equivalents. Below are some oil and oil filters made for most Acura vehicles. Check online or at your local auto parts store for exact part numbers.
Oil Filter
Genuine Honda/Acura filters typically run $10–$15. Check the current price on Amazon.
When Is the Acura B12 Service Due?
The Maintenance Minder displays B12 when remaining oil life drops to 15%, which for most drivers falls between 5,000 and 7,500 miles after the last oil service — sooner with heavy city driving, towing or lots of short trips, later with steady highway use. Because the system reads actual operating conditions rather than counting miles, the exact figure differs from car to car.
The sub-items attached to this code run on their own longer intervals:
- 1 — Tire rotation: Every oil service
- 2 — Engine & cabin air filter replacement, drive belt inspection: ~30,000 mi
That is why the code changes over time: a B1 becomes B12 once those additional items fall due in the same visit.
Acura Models That Show the B12 Code
The B12 code can appear on any Maintenance Minder–equipped Acura, including the Acura MDX, Acura RDX, Acura TLX, Acura ILX, Acura Integra, Acura RLX, Acura ZDX and Acura TSX. The services it calls for are identical across the range, but oil capacity, fluid specification and labor time vary by engine. Always confirm the specification your engine requires in the owner’s manual.
Related Acura Service Codes
- Acura B1 — the same service without engine & cabin air filter replacement, drive belt inspection
- Acura A12 — the same items with an oil change only, no filter or inspection
- Acura B123 — adds transmission fluid + transfer case fluid (if equipped)
- Honda B12 — the Honda equivalent of this code
- All Acura Maintenance Minder codes — the full reference table
- Acura B124 service code
- Acura B125 service code
- Acura B1237 service code
- Acura B13 service code
Is Acura B12 Service Free Under Complimentary Maintenance?
Partly, at best. Acura’s complimentary maintenance covers the basic A1 and B1 services — oil, filter, tire rotation and inspection — for two years or 24,000 miles on model year 2023 and 2024 vehicles, and only the first scheduled service within 12 months or 12,000 miles on model year 2025. The B12 service includes items beyond that scope, so expect to pay for the extras.
Three conditions apply either way. The work must be done at a participating Acura dealer, Acura Genuine parts and oil must be used, and the clock runs from the vehicle’s original in-service date rather than your purchase date. The benefit does transfer to a second owner for whatever remains of the term, which is worth checking if you bought your Acura used.
What B12 Means for SH-AWD Acuras
The B12 service itself is the same work whether your Acura is front-wheel drive or SH-AWD. What differs is what tends to appear alongside it. Acura’s Super Handling All-Wheel Drive uses a torque-vectoring rear unit that Honda does not fit to its own models, and it has its own fluid service — sub-item 6, rear differential fluid, due at 15,000 miles initially and every 30,000 miles thereafter.
So if you drive an SH-AWD MDX, RDX, TLX or ZDX, do not be surprised when B12 arrives with a 6 attached. Front-wheel-drive Acuras — ILX, Integra, and the front-drive TLX and RDX variants — never show a 6, because there is no rear differential to service.
Acura B12 Service FAQ
How long can I drive with the B12 code showing?
The Maintenance Minder is counting down oil life, not mileage, so the honest answer is that it depends on how you drive. Acura’s display gives you a wrench symbol and a percentage: at 15% you get the first reminder, at 5% the message becomes more insistent, and at 0% it changes to a negative mileage count that tells you how far past due you are. Treat 15% as a booking prompt rather than a deadline. The oil is the part with a real clock on it; the other items in B12 tolerate a few hundred miles of delay without harm.
Can I do the Acura B12 service myself?
The filters and the oil are simple home jobs. The “B” inspection is the piece worth paying for, since it covers the brake and suspension components you cannot easily assess on a driveway.
Is the B12 service covered by Acura complimentary maintenance?
Probably not. Acura’s complimentary maintenance program covers the basic A1 and B1 services — oil, filter, tire rotation and inspection — for two years or 24,000 miles on model year 2023 and 2024 cars, and only the first scheduled service within 12 months or 12,000 miles on model year 2025. B12 goes beyond that basic scope, so the additional items are normally chargeable even if your car is still inside the program. It is still worth asking the service advisor to itemize the invoice, because the oil and rotation portion may be covered while the rest is not.
Can I get the B12 service done at a Honda dealer?
Yes, and it is often cheaper. Acura is Honda’s luxury division, the two share a parts network, and many of the fluids and filters carry the same part number with a different label on the box. A Honda service department can perform B12 on an Acura without difficulty. The two caveats: if your car is still inside the complimentary maintenance term you must use an Acura dealer to have it covered, and if you own an SH-AWD model, confirm the shop has worked on the torque-vectoring rear unit before, since it is Acura-specific hardware Honda does not fit.
Does the B12 code mean something is broken?
No. B12 is a scheduled maintenance reminder generated by the Maintenance Minder’s algorithm, not a diagnostic trouble code. It appears as a wrench symbol. A check engine light is a separate system entirely and indicates a fault the engine control unit has logged. If you are seeing both at once, they are unrelated and the check engine light is the one to deal with first.
How do I clear the B12 code after the service?
If an Acura dealer did the work they will reset it for you. If you did it yourself, the method depends on the car: models with a touchscreen use Settings then Vehicle then Maintenance Reset, while older models use the SEL/RESET stalk button or the trip knob held for about ten seconds with the ignition on. Reset it only after the work is actually done — the Minder’s countdown is what schedules your next service, and a premature reset throws the whole schedule out. Our Acura Maintenance Minder reset guide covers every method by model.