If your dashboard displays the Acura B1 service code, it means your vehicle is due for a combination of maintenance tasks designed to keep your Acura performing reliably. In this guide, we’ll explain what the Acura B1 service includes, how much it costs, and why it’s an essential part of your car’s maintenance schedule.
What Does the Acura B1 Service Code Mean?
The Acura B1 maintenance code combines two different service reminders:
- “B”: Engine oil and filter change + detailed multi-point vehicle inspection
- “1” : Tire rotation and pressure/tread inspection
When you see “B1” on your Acura’s Maintenance Minder display, it means your vehicle needs both of these services performed soon.
Acura B1 Service Overview
The Acura maintenance minder code sheet above lists all the main and sub service items with B1 highlighted.
The B1 service is one of the most common maintenance codes for Acura owners. It’s similar to an A1 service, but with additional inspections. Acura recommends performing the B1 service roughly every 7,500 to 10,000 miles or every 12 months, depending on driving conditions.
B1 Service Includes:
1. Engine Oil and Filter Change (Main Service B)
This includes draining old engine oil, replacing the oil filter, and refilling with fresh oil (synthetic or conventional depending on your model). Regular oil changes help extend engine life and maintain performance.
2. Multi-Point Vehicle Inspection
During the B1 service, your Acura technician will inspect critical systems and components, including:
- Front and rear brakes
- Steering gearbox, tie rods, and boots
- Suspension and driveshaft boots
- Brake hoses and lines (including ABS/VSA)
- Exhaust system and fuel lines
- Fluid levels and condition (brake, transmission, coolant, power steering)
3. Tire Rotation (Sub-Service 1)
Tires are rotated to promote even wear, improve handling, and extend lifespan. The technician will also check:
- Tire pressure
- Tread depth
- Signs of uneven wear or punctures
Acura B1 Service Cost
The average cost of an Acura B1 service ranges from $100 to $250, depending on your location, Acura model, and labor rates. Here’s a breakdown:
| Service Type | Typical Cost | Time Required |
|---|---|---|
| Oil & Filter Change (B) | $90 – $180 | 30–45 minutes |
| Tire Rotation (1) | $30 – $45 | 15–20 minutes |
| Full B1 Service | $120 – $225 | 45–75 minutes |
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
RepairPal also offers a “1” service (tire rotation) cost estimate for your vehicle and location:
https://repairpal.com/estimator/tire-rotation-cost
Money-Saving Tip
Many Acura dealerships and independent repair shops offer coupons or service specials for maintenance like the B1. Always check online or call ahead for current deals.
Acura B1 DIY Service Cost
Prefer doing your own maintenance? Performing a DIY Acura B1 service can cost around $50–$70, depending on your oil and filter brand.
Recommended Parts for DIY:
- Engine oil: Synthetic 0W-20 or 5W-30 (check your owner’s manual)
- Oil filter: Genuine Acura or high-quality aftermarket brand (e.g., Fram, Bosch, Mobil 1)
Ensure you properly dispose of old oil and filters at a certified recycling center.
Pro Tip: Record your vehicles services in a vehicle maintenance spreadsheet to keep track of all your Acura’s services. This way you’ll know exactly what has been done to your Acura and when it was performed.
Why the Acura B1 Service Is Important
Ignoring your B1 service reminder can lead to reduced fuel efficiency, uneven tire wear, or potential mechanical issues. Completing this scheduled maintenance helps:
- Maintain peak engine performance
- Extend your Acura’s lifespan
- Preserve warranty coverage
- Retain resale value
When Is the Acura B1 Service Due?
The Maintenance Minder displays B1 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
Acura Models That Show the B1 Code
The B1 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 A1 — the same items with an oil change only, no filter or inspection
- Acura B12 — adds engine & cabin air filter replacement, drive belt inspection
- Acura B13 — adds transmission fluid + transfer case fluid (if equipped)
- Honda B1 — the Honda equivalent of this code
- All Acura Maintenance Minder codes — the full reference table
- Acura B123 service code
- Acura B135 service code
- Acura B14 service code
- Acura B15 service code
Is Acura B1 Service Free Under Complimentary Maintenance?
If your Acura is still within its complimentary maintenance term, the B1 service may cost you nothing. Acura covers A1 and B1 services — engine oil, filter, tire rotation and a multi-point inspection — for two years or 24,000 miles on model year 2023 and 2024 vehicles. For model year 2025 the program was cut back to the first scheduled service within 12 months or 12,000 miles.
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 B1 Means for SH-AWD Acuras
The B1 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 B1 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 B1 Service FAQ
How long can I drive with the B1 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 B1 tolerate a few hundred miles of delay without harm.
Can I do the Acura B1 service myself?
The oil, filter and rotation are straightforward at home. The inspection is the part most owners skip, and it is the part that matters — the “B” inspection covers brakes, suspension, driveshaft boots, brake lines, fuel lines and the exhaust. If you do the mechanical work yourself, at least get the underside looked at annually.
Is the B1 service covered by Acura complimentary maintenance?
Quite possibly, and this is the question most Acura owners miss. Acura includes complimentary scheduled maintenance on new vehicles, and B1 is exactly the kind of service it covers. On model year 2023 and 2024 cars the program covers A1 and B1 services — oil, filter, tire rotation and a multi-point inspection — for two years or 24,000 miles, whichever comes first. For model year 2025 Acura reduced this to the first scheduled service within 12 months or 12,000 miles. The work has to be done at a participating Acura dealer using Acura Genuine parts and oil, and the benefit transfers to a second owner within the original term. Check your in-service date before you pay for this one.
Can I get the B1 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 B1 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 B1 code mean something is broken?
No. B1 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 B1 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.