The B position in Honda transmissions is the engine-braking (brake) mode, used to slow the vehicle with the engine rather than relying solely on the brakes. In hybrids and CVTs, it can also boost regenerative braking. The exact behavior depends on the model and drivetrain.
How B works across Honda drivetrains
Honda uses B differently depending on whether the car has a CVT, a traditional automatic, or a hybrid system. Here is a breakdown of typical behavior across gen models.
CVT and hybrid models
In CVT-equipped Hondas and in most hybrids, selecting B keeps the engine operating at a higher RPM range to provide stronger engine braking when you lift off the throttle. It also tends to increase regenerative braking, converting more of your kinetic energy back into the battery. The result is firmer deceleration without heavy use of the foot brake, especially on long downhill grades. The exact stopping feel and the regen level can vary by model year and software tuning.
Non-hybrid traditional automatics
On older or non-hybrid Hondas that offer a B or low-gear setting in an automatic, B acts as a low gear to deliver engine braking and greater deceleration when descending hills or towing. It's not as common in the current lineup, and the availability and behavior depend on the transmission design and market.
Usage tips for B mode
Before using B, drivers should understand the best scenarios and any cautions. The following points summarize typical guidance across models.
Here is a quick guide to how and when you might use B mode:
- Use on long downhill grades to reduce brake fade and maintain control by increasing engine braking.
- Use when you want to supplement brake force with engine braking, such as on steep descents or slippery surfaces.
- In hybrids, B may boost regenerative braking, helping recharge the battery during descent. Avoid using B on flat, straight, or regular cruising unless directed by the manual, as it can limit acceleration and fuel economy.
Always refer to your specific model’s owner manual for the exact function and limitations, as Honda’s software and transmission configurations can differ by year and trim.
Summary
In short, the B gear on Honda transmissions is an engine-braking or brake mode designed to aid deceleration and reduce brake wear, with additional regenerative braking in hybrids. Its availability and exact behavior depend on the model and transmission type, so check your owner’s manual for model-specific details.