Lend Your Tesla Without the Anxiety

“How Was the Car?” Gets an Honest Answer

You hand over the keys to your spouse, adult kid, or visiting relative. They return it hours later. “How was the car?” They say “Fine.”

But did they push it? Hit any curbs? Go somewhere they shouldn’t?

You’ll never really know unless you have data. Sentry Driver gives you that data automatically.

Bluetooth Detection: The Key to Automatic Monitoring

Here’s how it works:

Sentry Driver uses your phone’s Bluetooth Low Energy (BLE) signal to detect your Tesla’s VIN hash. When the RSSI signal strength exceeds -75 dBm - roughly 2 meters - you’re considered “present.”

You’re in the car: Signal detected, monitoring stays off. Drive wherever you want without logging alerts to yourself.

You leave the car: Signal drops below threshold, monitoring activates. The next person who drives triggers full tracking.

No toggle to remember. No app for them to install. No way to forget.

What Gets Tracked on Every Trip

When someone else drives your Tesla, you see:

• Real-time location, speed, and heading - Where they are as they drive
• Trip summary - Start/end times, total distance, total duration
• Maximum speed reached - The peak, not just average
• Hard braking count - How many times they stomped the brakes
• Acceleration events - How many times they floored it
• Event log - Timestamps and locations for anything notable

It’s the same data Tesla records. Sentry Driver just surfaces it for you.

5 Alert Types You Can Configure

Speed Limit Alerts

Set a threshold: 70, 75, 80 - whatever you’re comfortable with. Get a push notification the instant they exceed it, with the exact speed and location.

Driving Behavior Alerts

Hard braking and acceleration detection with three sensitivity levels. See patterns over time. One hard brake is nothing; ten per trip is a conversation.

Accident Detection

Three sensitivity levels: Low (2g impact), Medium (4g), High (8g). Get an immediate alert with location if something happens. Higher sensitivity catches more but may have false positives.

Geofence Zones

Draw circular boundaries. Mark as “allowed” or “restricted.” Get alerted when they enter or leave. Good for knowing if your car ended up somewhere unexpected.

Curfew Monitoring

Set allowed hours, specific days, timezone-aware. Less common for shared vehicles, but useful if you want to know about late-night drives.

“Only Alert When I’m Not There”

Every alert type has this option. When enabled, Sentry Driver checks Bluetooth detection before triggering any notification. If your phone is within ~2 meters of the car, no alert fires.

This is the default for shared vehicle scenarios. You don’t want to alert yourself every time you accelerate.

Perfect for Any Borrower

Spouse or partner: See their commute patterns without asking. Know if they made it safely.

Adult children: Trust but verify. They’re grown, but it’s still your car.

Visiting relatives: They don’t know the area. You’ll know if they got lost or pushed the car hard on unfamiliar roads.

Anyone else: Neighbors, friends, whoever. Your car, your visibility.

None of them install anything. None of them can disable it.

Having the Conversation

We recommend telling people you’re monitoring. Not as a threat - as transparency.

“Hey, the car has monitoring on it. Just so you know.”

Most people drive more carefully when they know. That’s the outcome you actually want.

Frequently Asked Questions

Does the person borrowing my car need to install an app?

No. Only the Tesla owner needs Sentry Driver. The person borrowing your car doesn’t install anything, pair anything, or change how they drive.

What if my spouse also has a phone paired as a key?

Sentry Driver’s detection is based on your phone’s Bluetooth, not Tesla’s phone key feature. You can add multiple phones as “owners” so monitoring only activates when none of the designated phones are present.

How accurate is the ~2 meter detection range?

It’s based on RSSI signal strength of -75 dBm. In practice, this means you need to physically walk away from the car with your phone before monitoring activates. It won’t trigger while you’re standing next to it.

Can I see where they drove in real-time?

Yes. You get real-time location, speed, and heading while they’re driving. Plus a complete trip summary when they finish.

What if I only care about accidents?

Configure just accident detection and disable the other alert types. You’ll only get notified if something serious happens.