Lend Your Tesla Without the Anxiety

“How Was the Car?” Gets an Honest Answer

In a household with one Tesla and several drivers, shared Tesla monitoring is really about peace of mind. 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 anything? Go somewhere they shouldn’t?

You’ll never really know unless you have data. Sentry Driver gives you that data automatically - and because it’s tied to your owner phone, alerts are intended for drives where your phone is not detected.

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. Less to forget.

What Gets Tracked on Every Trip

When your Tesla is driven without your owner phone detected, you see:

• Location, speed, and heading - Where the car is as telemetry is received
• 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 notable events

It’s vehicle telemetry from Tesla’s Fleet API, surfaced for you in a way the normal Tesla app is not designed around.

5 Alert Types You Can Configure

Speed Limit Alerts

Set a threshold: 70, 75, 80 - whatever you’re comfortable with. Get a push notification when the car exceeds it, with 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 a timely alert with location if Sentry Driver detects a possible impact. 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. There is no driver-side app or dongle for them to manage. If it’s an occasional loan rather than a household routine, our guide on monitoring a borrowed Tesla walks through the same setup.

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 location, speed, and heading while telemetry is available. Plus a 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.