As a full-size MPV built around family comfort, the Denza D9 asks a lot of anyone climbing into the second or third row. An electric running board turns that climb into a single, low step, deploying the instant a door opens and disappearing again once everyone's seated. Here's what that upgrade looks like on the D9 specifically.
The Denza D9 is built to move a full family in comfort, and Decoin's electric running board is designed to match that ambition. The step extends automatically the moment any door opens, giving second- and third-row passengers a stable, well-lit platform to step onto, then folds back underneath the body once the door shuts, so the D9's smooth flanks stay uninterrupted at speed.
Built for Every Row
Because the D9 seats up to seven, the running board is engineered to serve every door equally — front passengers get the same confident step-in as anyone climbing back to the third row, which matters most when you're juggling car seats, groceries, or simply tired legs after a long drive.
Weather-Ready, Low Maintenance
The mechanism and step surface are sealed against rain, road salt, and grit, so the board keeps working the same way through a wet commute as it does on a dry weekend trip. Once installed, there's essentially nothing to maintain beyond an occasional wipe-down.
A Clean Fit, Not an Add-On
Rather than looking like an aftermarket accessory, the running board is shaped and finished to sit flush with the D9's lines, retracting fully out of sight so the vehicle's profile looks factory-stock whenever the board isn't in use.
Frequently Asked Questions
Will the running board interfere with ground clearance? No — it retracts fully against the underbody when not deployed, so clearance is unaffected while driving.
Does it work on all four doors? Yes, the kit is designed to deploy in sync with every door on the Denza D9, front and rear.
Is professional installation required? Most owners have it fitted by a local installer in a few hours; the kit is designed for bolt-on mounting without permanent modification.
Explore the complete lineup on the BYD running boards and power steps hub.
