B3A4B

Active Aerodynamic Feature C Actuator Temperature Too High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–444 (est.)

Symptoms

Failure of the active aerodynamic element
Dashboard warning
Reduced system efficiency at high speeds

Causes

Drive mechanism jammed
Motor/servo failure
Problems in the wiring harness
Temperature sensor malfunction
Circuit fuse blown

How to Fix

Drive electrical circuit diagnostics
Checking the mechanism for free movement
Measuring the resistance of electric motor windings
Checking the temperature sensor
Replacing faulty components

Related codes

B3A4A B3A4C U0121