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What Causes the Failure of Passat's Keyless Entry Function?

2 Answers

SanLouis

07/29/25 9:42am

Possible reasons for the failure of Passat's keyless entry function include: Reason 1: Presence of electromagnetic interference sources nearby. Reason 2: Insufficient battery power in the key. Below is relevant information: Exterior: The Passat features slender spoke designs on the wheel side. The vehicle's dimensions are 4933×1836×1469mm in length, width, and height, with a wheelbase of 2871mm, offering rear headroom and legroom that far surpasses competitors in its class. Powertrain: The Passat is equipped with three different engines: 1.4T, 1.8T, and 2.0T.

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SanEllie

08/12/25 11:10am

A few days ago, the keyless entry function of my Passat also stopped working, possibly due to a dead key battery. The coin cell battery in the key loses voltage over time and can't emit a strong enough signal, so the car can't detect it. Additionally, if the sensor on the door handle is dusty or damaged, it affects the sensing sensitivity. I tried replacing the battery, and it worked fine afterward. If the issue persists after changing the battery, there might be external interference—like parking near large electronic devices that block the signal—or a faulty receiver antenna in the car. It's recommended to maintain the key properly, check the battery annually, and avoid malfunctions at critical moments. If the problem continues, it's best to visit a 4S shop to scan for system error codes with a diagnostic tool to prevent minor issues from escalating. Regularly testing the function before driving is also important.

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