The B1237 Honda maintenance code represents an oil and filter change, a vehicle inspection, tire rotation service, engine and cabin air filter replacement, drive belt inspection, transmission fluid replacement, and transfer fluid replacement (if equipped), and brake fluid replacement.
The “B” stands for an oil and filter change with vehicle inspection, the “1” stands for a tire rotation, the “2” stands for an engine and cabin filter replacement with drive belt inspection, the”3″ stands for a transmission fluid replacement and transfer fluid replacement, the “7” stands for brake fluid replacement.
The B1237 service is similar to the B123 service but it adds brake fluid replacement. It is typically performed by a Honda dealership or with a local mechanic.
Honda B1237 Service Cost
The B1237 service typically costs $400 to $705. The cost will depend on the specific Honda 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 |
| “3” | Transmission fluid (and transfer fluid on AWD) | $100 – $200 |
| “7” | Brake fluid | $80 – $130 |
| Total Honda B1237 service | $400 – $705 | |
For maintenance services like the B1237, 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 Honda model you have. It is a 30 to 40-minute service with the cost mostly from the parts. Some Honda vehicles, like the 2022 Pilot, 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 Honda 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:
Tire Rotation Estimator
“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 Honda 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
“3” Service Cost
The “3” service for Honda vehicles can cost $100 to $200 from the fluid depending on your vehicle. However, we suggest calling your Honda dealership or 3rd party auto repair shop for exact quotes.
RepairPal offers an estimator transmission fluid but not the transfer case fluid replacement portion of the “3” service:
Transmission Fluid Replacement Estimator
“7” Service Cost
The “7” service for Honda vehicles can cost $80 to $130 depending on your vehicle. However, we suggest calling your Honda dealership or 3rd party auto repair shop for exact quotes.
Honda B1237 DIY Cost
Want to save money or prefer to rely on yourself for your Honda’s maintenance? Performing a B1237 service yourself will cost $150 to $250 depending on the brands and oil type you use.
We suggest using Honda parts or any aftermarket equivalents. Below are some oil and oil filters made for most Honda vehicles. Check online or at your local auto parts store for exact part numbers.
Oil Filter
Use a Genuine Honda oil filter for your oil change. Prices fluctuate between $10-$15 for an oil filter.
Brake Fluid
Check your owner’s manual if your Honda vehicle uses DOT 3 or DOT 4 brake fluid. Then check prices for your brake fluid
Honda B1237 Maintenance Minder Description
The Honda maintenance minder code sheet above lists all the main and sub service items with B1237 highlighted.
“B” Main Service Item
Honda describes the “B” service as an engine oil and filter change with a vehicle inspection. The parts included in the Honda 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
Honda 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
Honda describes the “2” service as an engine air filter replacement, cabin air filter replacement, and drive belt inspection.
“3” Sub Service Item
Honda describes the “3” service as a transmission fluid replacement and transfer case fluid replacement. Only Hondas with 4WD or AWD will have a transfer case and need the fluid changed out.
“7” Sub Service Item
Honda describes the “7” service as a brake fluid replacement where all the brake fluid is flushed out of the vehicle hydraulic brake system.
When Is the Honda B1237 Service Due?
The Maintenance Minder displays B1237 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
- 3 — Transmission fluid + transfer case fluid (if equipped): ~90,000 mi
- 7 — Brake fluid replacement: Every 3 years
That is why the code changes over time: a B1 becomes B1237 once those additional items fall due in the same visit.
Honda Models That Show the B1237 Code
The B1237 code can appear on any Maintenance Minder–equipped Honda, including the Honda Accord, Honda Civic, Honda CR-V, Honda Pilot, Honda Odyssey, Honda HR-V, Honda Passport, Honda Ridgeline and Honda Insight. The services it calls for are identical across the range, but oil capacity, fluid specification and labor time vary by engine — and AWD or SH-AWD models add transfer case fluid to sub-item 3. Always confirm the specification your engine requires in the owner’s manual.
Related Honda Service Codes
- Honda B123 — the same service without brake fluid replacement
- Honda A1237 — the same items with an oil change only, no filter or inspection
- All Honda Maintenance Minder codes — the full reference table
Brake Fluid: The One Part of B1237 That Ignores Your Mileage
Sub-item 7 is a brake fluid replacement, and it is the odd one out in B1237 because it runs on a calendar rather than an odometer. Honda calls for brake fluid every three years regardless of mileage. A car that covers 4,000 miles a year needs it on exactly the same schedule as one covering 20,000.
The reason is that brake fluid is hygroscopic: it absorbs moisture from the air through the hoses and reservoir over time. Water lowers the boiling point, and fluid that boils under hard or sustained braking turns to vapor, which compresses. That is the long, soft pedal people describe coming down a mountain pass. It is also why the service is not optional on a low-mileage car.
Honda specifies DOT 3, and the job is a proper bleed at all four corners until clean fluid runs through, not a reservoir top-up. Old fluid is visibly darker than new. If a shop quotes B1237 and the price looks light, it is worth confirming the brake fluid line is actually a flush.
Where this sits in B1237: the “B” is an oil and filter change with the multi-point inspection, sub-items 1, 2 and 3 add the tire rotation, the filter work, the transmission fluid, and sub-item 7 is the item described above. Each is tracked separately by the Maintenance Minder, so B1237 is a bundle of independent jobs that happened to come due together, not one procedure with a single price.
Honda B1237 Service FAQ
What does the Honda B1237 code actually include?
Reading it left to right: the “B” is an oil and filter change with a multi-point inspection, and each number after it is a separate job. For B1237 that means a tire rotation, engine and cabin air filters with a drive belt inspection, a transmission fluid change, a brake fluid replacement. They arrive together because the Maintenance Minder counts each item down on its own schedule and shows you whatever has come due at the same time, which is why the same car shows different combinations at different points in its life.
How long can I leave the B1237 service?
The oil portion is what has a real deadline. The wrench appears at 15% oil life, sharpens at 5%, and at 0% the display starts counting how far overdue you are. The brake fluid in B1237 is the item people wrongly treat as flexible: it is on a three-year clock and a low-mileage car is not exempt.
Can I do the Honda B1237 service myself?
Partly, and it is worth splitting the job. The oil and the tire rotation are straightforward at home. The remaining fluid work needs the right Honda-specific fluid rather than a universal equivalent.
Is the B1237 service covered by Honda Service Pass?
No. Honda Service Pass covers the basic A1 and B1 services — oil, filter, tire rotation and inspection — on 2025 and newer Hondas for one year or 12,000 miles. B1237 includes work beyond that scope, so the extra items are chargeable even on a car still inside the term. Ask for an itemized invoice: the oil and rotation portion may still be covered while the rest is not.
Does B1237 mean something is wrong with my Honda?
No. It is the maintenance schedule, not the diagnostics. B1237 shows as a wrench symbol and simply means the algorithm has counted those items down to zero. A check engine light is a different system reporting a stored fault. If both are lit they are unrelated, and the check engine light is the one to investigate first.
How do I reset the B1237 code?
Touchscreen cars: Settings, then Vehicle, then Maintenance Reset. Older models: hold the SEL/RESET button or trip stalk for around ten seconds with the ignition on. Reset only the items actually done — on multi-item codes like B1237 you can reset individual sub-items, and clearing the whole code after doing only the oil will hide the jobs you still owe the car. Our Honda Maintenance Minder reset guide covers it model by model.