Tesla Passenger Door Won't Unlock: Causes and Solutions!

Tesla Passenger Door Won’t Unlock: Causes and Solutions!

It’s upsetting to see rear doors not opening even if using a key card, app, or touchscreen in Tesla. And a lot of folks facing this and want to know the reasons along with fixes.

Well, the Tesla passenger door won’t unlock issue occurs if Driver Door Unlock Mode, Child Locks, or Automatic Door setting is turned on. Or, the system fault, bad door hinge cables, or the Passive Authentication turned off can also cause this issue.

In this guide, I’ll break down the causes of this issue and show the solutions so you can try these yourself. Let’s get into it!

Tesla Passenger Door Won't Unlock: Causes and Solutions!

Why Your Tesla Passenger Door Won’t Unlock?

There are potentially a few reasons why the Tesla back door won’t open or unlock. Let me share the causes below:

Cause #1: Driver Door Unlock Mode Is Activated

Most of the time, the back door refuses to unlock in Tesla due to the Driver Door Unlock Mode. When this mode is turned on, it requires you to long press the button at the top of the interior driver door handle.

How to Fix It?

To unlock the Tesla passenger door from the outside, you’ll first need to disable the Driver Door Unlock Mode. For that, go to Controls > Locks or Vehicle > Driver Door Unlock Mode option on the screen and simply turn it off.

unlock the Tesla passenger door from the outside

However, if you want to have this feature but require unlocking the rear doors, then click on the interior driver door handle for a few seconds. And then, use the touchscreen, Tesla app, or key fob to release the passenger door.

Cause #2: System Glitch

When you command the car with tons of functions at once, the system can fail to react appropriately. In this case, it can close all the running functions including the command you give for unlocking the rear doors.

How to Fix It?

Start by, rebooting the car using the 2-scroll button for around 9 – 10 seconds, and then let it do the magic. If this doesn’t resolve the issue, then hard reset the car. For that, shut down your car (Controls > Safety > Power Off) and unlock the front trunk.

Next, remove the battery cover to detach the 12V battery ground wire and high-voltage loop plugs. After doing so, wait for 3 – 4 minutes and then reattach them to hard reset successfully. Then, reinstall the battery cover and close the front trunk.

If your MX door seems to not unlocking, then fix the Model X door not opening issue like this.

Cause #3: Passive Authentication to the OFF Position

Another reason the left or right back door doesn’t unlock is because of the Passive Authentication feature. When this feature is turned off, you’ll find the back door showing issues to unlock.

Tesla Passive Authentication to the OFF Position

How to Fix It?

To begin with, open the Tesla app on your phone. Next, scroll down to find the option Security & Drive. Then, locate the option Passive Authentication and turn it on.

Cause #4: Child Locks Turn ON In the Rear Doors

Sometimes the Child Lock option turned on can cause back doors to not unlock due to safety purposes. As the car thinks, the child is sitting behind and so doesn’t unlock the rear doors even if you try to unlock it via the Tesla app, key fob, or touchscreen.

How to Fix It?

Firstly, get inside the car and click on Quick Controls. After that, hit on the Locks option and locate the Child Lock bar.

Next, turn it off by clicking on it one time (make it grey) and then try opening the rear door using the Tesla app, key fob, or touchscreen.

Cause #5: Automatic Door Setting

In some cases, the Tesla Auto Present Handles or Automatic Door setting can cause the rear door to open only when you double-click. Due to this trait, your car may be showing this sort of issue.

How to Fix It?

Just turn off the Auto-Present Handles or Automatic Door option. To do that, go to Controls > Locks > Automatic Door setting and turn it off.

Cause #6: Broken Door Hinge Cables

The Tesla’s back doors may not unlock or open if the door hinge cables are the issue. In that case, the car might open on the front sides but won’t unlock on the rear sides.

How to Fix It?

On the rear door which doesn’t open, unlock it via Tesla App or forcefully (if possible). Then, in the swinging part (that connects the car to the door with a metal mechanism), you’ll see the big black cable.

Tesla Broken Door Hinge Cables
Image: teslamotorsclub.com

Now, remove the door cover using a pry bar and then detach the bolts with the right tool. After that, take out the driver side kick panel and then disconnect 2 bolts from the inside.

Next, uncover all the wires by pulling them on. Then, check which cables seem problematic and then cut them to uncover the good conduct area.

After that, connect the good conduct area on both wires and joint them (matching the wire color). Then, tape them to protect the exposed part. Next, reverse the process to reinstall all the parts.

For a detailed solution on the M3 passenger door not unlocking, resolve the issue of the back door won’t open by reading this guide.

How to Open Tesla Passenger Door from Driver Seat?

It’s possible to open the passenger doors while you are in the driver’s seat. To do that, here’s the procedure:

  1. In the driver’s seat, use the touchscreen and locate the Lock/Unlock icon on the top section (left corner) of the left screen.
  2. Click on the Lock/Unlock icon to easily unlock the doors. Done!

Wrap Up

It takes not more than 5 – 15 minutes to fix the issue of the Tesla passenger door won’t unlock. If the above procedure seems tough to attempt in the real world, it’s best to troubleshoot the bug via Tesla Service Center.

However, be sure to prepare a big budget as they’ll take some unless warranty service is still available. Hope you find this guide helpful to resolve this error easily!

As a driver, facing an issue with your Model 3 Walk Away lock not working? Then, check this guide and fix the bug!

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