B101CDriver seat-belt buckle switch fault

• Volkswagen group code · Airbag (SRS)
• Lights a warning lamp

How the car detects it

The switch in the driver's seat-belt buckle reports a mechanical fault, so the airbag unit can't tell reliably whether the belt is fastened. While an airbag fault is stored, the affected airbag or pretensioner may not deploy in a crash. Have it repaired before relying on it. Never probe airbag connectors with a meter: that can fire the airbag.

What you may notice

• Airbag warning light
• Seat-belt reminder behaving oddly

Likely causes

• PossibleBuckle switch or buckle
• PossibleConnector under the driver's seat

Sources

• static.nhtsa.gov › MC-10234534-0001.pdf · official document

Backed by an official manufacturer document.

From Obdaryn's Volkswagen group pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.