Mazda Biante: Power Sliding Door Motor Brush Wear and Cable Fraying

The Biante's electric power sliding doors (both sides) are driven by a reversible DC motor with carbon brushes and a nylon-coated steel cable running through a pulley system in the door B-pillar and sill. The motor brushes wear from frequent use, causing intermittent or complete door failure. Simultaneously the cable fray at the drum anchor or at pulley contact points, jamming the door mid-travel or causing the auto-open/close to abort. Failure is more common on the driver's side left rear door due to higher use frequency. Replacement requires full door trim removal and cable rerouting.

• Door halts mid-travel and reverses or stops, triggering a beep, particularly on cold mornings or after the vehicle sits unused for several days
• Audible motor whine or clicking from the B-pillar area without door movement, indicating brush or cable seizure
• Door operates normally in manual push mode but fails in auto-electric mode

1. 1

   Operate both sliding doors via the door button, the interior switch, and the key-fob at least five times each.

2. 2

   Listen for grinding, hesitation, or motor whine without movement.

3. 3

   Check that both doors fully latch without manual assistance.

4. 4

   Inspect the lower door sill cable channel for any visible cable kinking or fraying through the inspection aperture.

≈A$600 to ≈A$1,660 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Have either power sliding doors ever stuck, reversed unexpectedly, or required manual assistance to close?”
• “Has the sliding door motor or cable been replaced or inspected on this vehicle?”
• “Does the vehicle have service records showing door mechanism lubrication at recommended intervals?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.