B3121

Keyless Entry Antenna 3

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reducing the range of the key fob
Problems with unlocking/locking doors
Sometimes the system stops working completely

Causes

Broken or damaged antenna wires
Malfunction of the antenna itself
Wiring Harness Problems
Today we will discuss some common issues related to B3121 and their solutions.
Malfunctions of the keyless entry module

How to Fix

Check the integrity of the antenna wires and contacts
Test the antenna using diagnostic equipment
Replace the antenna if a malfunction is detected
Check the operation of the keyless entry module

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