Front brake caliper mounting bolts on a 2009 Honda Accord are typically M12 x 1.5 with a 14 mm hex head, about 28–30 mm long. The same size is generally used for rear disc brakes on most trims, though variations can occur by market and option package. Always verify with the service manual or by inspecting the vehicle’s hardware.
The question asks for the bolt size on the brake caliper for this model year. Brake calipers use two main sets of fasteners: the mounting bolts that attach the caliper to the knuckle/bracket, and the guide pins that allow the caliper to slide. This article focuses on the mounting bolts most people need when servicing or replacing calipers on a 2009 Accord.
Bolt sizes by brake location
Because the hardware can vary by year, market and trim, here are the commonly observed sizes for the 2009 Accord’s disc brakes:
- Front caliper mounting bolts: M12 x 1.5 thread; 14 mm hex head; typical length around 28–30 mm.
- Rear caliper mounting bolts (where rear discs are present): M12 x 1.5 thread; 14 mm hex head; typical length around 26–32 mm.
If your car uses rear drums or a different configuration, brake-hardware sizes can differ. Always cross-check with your vehicle’s service manual or parts diagram to confirm exact specs for your VIN and trim level.
How to confirm on your car
To verify the exact bolt sizes on your specific vehicle, follow these steps:
- Inspect the caliper mounting bolts on the car and note the bolt head size (likely 14 mm for the Accord front calipers).
- Measure the thread pitch and diameter if you’re replacing fasteners, or remove one bolt to read its markings and compare with service diagrams.
- Consult the official Honda service manual or a reputable parts catalog for your exact trim and VIN to confirm the correct bolt size and length.
By confirming with the service manual or physical measurement, you ensure you’re using the correct hardware for safe braking performance.
Summary: For a 2009 Honda Accord, the typical front brake caliper mounting bolts are M12 x 1.5 with a 14 mm head, about 28–30 mm long; rear caliper mounting bolts (where present) are usually the same size. Always verify against your specific vehicle's manual or diagrams, as variations can occur by market and trim.