B1668 Code: Meaning, Symptoms, Causes & Fix

Overview

Code B1668 indicates a fault in Mirror Driver Right/Left Motor Stalled, typically within body electronics and comfort modules.

Symptoms

related warning lamp illuminated
battery draw complaints
feature inoperative intermittently

Common causes

Component failure in the monitored system affecting mirror driver right/left motor stalled
Control module logic or calibration issue
Connector pin damage/corrosion or harness stress near related components

How to diagnose B1668

Confirm B1668 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to mirror driver right/left motor stalled for obvious defects.
Use freeze-frame and live data to isolate whether the issue is electrical, mechanical, or control logic.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code B1668

Low: This code is low to moderate severity in most cases, but diagnosis is still recommended to avoid recurring warnings.

Can you drive with B1668?

The vehicle is often drivable with B1668, but plan a repair window to prevent repeat faults.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (generic) in the mirror driver right/left motor stalled circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify B1668 remains cleared under the conditions that originally set the code.

Fix options

Clear code and confirm through drive cycle.
Test component operation and replace if faulty.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$90-$400

Common mistakes when diagnosing B1668

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

B1668 in common vehicles

B1668 appears across makes such as BMW, Mercedes-Benz, Audi, Volvo. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes B1668?

B1668 is commonly set by generic faults affecting mirror driver right/left motor stalled.

How much does it cost to fix B1668?

For B1668, repair costs are typically $90-$400 depending on exact root cause, labor rates, and part quality.

Can I clear B1668 without repair?

You can clear B1668 temporarily, but the code usually returns until the underlying fault is corrected.