You know that moment when you pop your Tesla’s trunk at night and can barely see inside? You’re digging around for groceries, gym bags, or charging cables, and the stock light barely illuminates a quarter of the space. It’s frustrating — especially for a car that costs what it does. The good news is this is one of the easiest upgrades you can make to your Model 3 or Model Y, and it takes less time than charging to 80% at a Supercharger.
I’ve owned both a Model Y and a Model 3, and the trunk lighting situation was one of the first things that bugged me on both cars. Tesla ships them with a single, dim LED that casts uneven shadows across the cargo area. After testing a few different trunk lighting solutions, I found one that actually works — and the install is so simple you’ll wonder why Tesla didn’t do this from the factory.
In this guide, I’ll walk you through adding a
360° soft LED trunk ambient lighting strip to your Tesla. No wiring, no drilling, no tools. Just plug and play.
What You’ll Need for This Tesla Trunk Light Upgrade
Before you start, gather these items. The list is short — that’s the whole point.
- Trunk ambient lighting strip — I use the
Tesla Model 3/Y Trunk Ambient Lighting Strip - Your Tesla’s 12V cigarette lighter outlet (located in the trunk)
- 5 minutes of your time
- Zero tools — no screwdrivers, no trim removal tools, nothing
Compatibility: This works on all Tesla Model 3 and Model Y variants from 2017 through 2024. That includes Highland refresh Model 3s. The cigarette lighter port placement is consistent across all these model years.
Installation difficulty: 1 out of 5. If you can plug in a phone charger, you can do this.
Step-by-Step: How to Install Trunk Ambient Lighting on Your Tesla
Step 1: Open Your Trunk and Locate the 12V Outlet
Pop your trunk using the touchscreen, key fob, or the Tesla app. Look along the left side wall of the trunk — you’ll find a 12V cigarette-style power outlet. On the Model Y, it’s in the left side panel area near the wheel well. On the Model 3, it’s in a similar position.
Why this matters: The outlet is the key to the entire install. These lighting strips are designed to draw power directly from this port, which means zero cutting into your car’s electrical system. Your warranty stays completely intact.
Tip: If you can’t find the outlet, check your owner’s manual or look for a small rectangular cover with a power icon. On some Model 3 years, it’s slightly recessed.
Step 2: Unbox the Lighting Strip and Check the Length
Take the lighting strip out of the packaging and unroll it. Give it a quick visual check — you want to make sure the LED strip isn’t kinked and the cigarette lighter plug end is undamaged. The strip should feel flexible but sturdy, with a waterproof silicone coating.
Why this matters: A quick check before installation saves you from having to redo it. The waterproof coating also means this light handles trunk spills, wet gear, and temperature swings without issues.
Tip: Lay the strip in your trunk temporarily to plan your routing path before plugging it in. This gives you a feel for how it’ll sit and where the light will fall.
Step 3: Route the Strip Around the Trunk Perimeter
This is where the 360° design really shines. Run the LED strip along the inner perimeter of your trunk — you can follow the edge where the trunk walls meet the floor, or trace along the upper lip of the trunk opening. The flexible strip bends easily around corners.
For the Model Y, I recommend running it along the floor perimeter. The trunk is wider, and the soft glow reflects off the floor and sidewalls evenly. For the Model 3, the upper trunk lip works better because the trunk space is more compact.
Why this matters: Placement determines how even the light distribution is. A perimeter route eliminates the dark corners that Tesla’s single stock light creates. You’ll get consistent illumination across the entire cargo area.
Tip: The strip has a mild adhesive backing, but don’t stress about perfect adhesion during your first pass. Once you’re happy with the route, press firmly along the entire length for a secure hold.
Step 4: Plug Into the 12V Outlet
Take the cigarette lighter plug end and insert it into the 12V outlet. You should see the LEDs illuminate immediately — soft, even light filling the trunk space.
Why this matters: This is the entire electrical installation. No wire splicing, no tapping into factory harnesses, no fuse box modifications. The plug-and-play design means the light turns on when the outlet has power (which is when the trunk is open or the car is on) and off when it doesn’t.
Tip: Tuck the excess cable neatly along the side wall. You want the trunk to look clean, not like a tech experiment. A few cable clips or even some discreet tucking behind trim edges keeps things tidy.
Step 5: Test and Adjust
Close the trunk, then reopen it to confirm the light activates properly. Check that the illumination is even across the cargo area. If you notice any dark spots, adjust the strip’s position slightly — even a few inches of movement can change the light pattern significantly.
Why this matters: A quick test confirms everything works and lets you fine-tune before you start loading cargo over the strip.
Tip: Take a photo with your phone before and after. You’ll want to show other Tesla owners the difference — and maybe post it on r/TeslaModelY.
3 Things Most People Get Wrong With Tesla Trunk Lighting
Mistake #1: Buying Hard-Wired LED Kits That Void the Warranty
Some trunk lighting kits require you to tap into the car’s wiring harness or splice into existing circuits. This is unnecessary and risky. On a Tesla, tampering with electrical connections can void portions of your warranty, especially related to the 12V system. A thread on r/TeslaMotors discusses how owners have had warranty claims questioned after electrical modifications.
The fix: Stick with plug-and-play solutions that use the factory 12V outlet. The outlet is designed for accessories, and using it for a low-power LED strip draws minimal current.
Mistake #2: Using Cheap Strip Lights Without Waterproofing
Your trunk sees everything — wet umbrellas, gym bags, groceries that leak, snow gear. Non-waterproof LED strips will fail within months when exposed to moisture. InsideEVs has documented how accessory longevity matters for maintaining resale value on EVs.
The fix: Choose a lighting strip with a silicone waterproof coating. The added cost is minimal, and the durability difference is massive.
Mistake #3: Ignoring Light Quality and Color Temperature
Not all LED strips are equal. Cheap ones produce harsh, blue-tinted light that looks aftermarket and clashes with Tesla’s interior aesthetic. Others flicker visibly, which is distracting and cheap-looking.
The fix: Look for soft white LEDs (around 3000-4000K color temperature) with consistent, flicker-free output. The goal is ambient lighting that complements the car’s interior, not a spotlight effect. As Electrek’s Model Y guide notes, quality accessories should feel like factory additions, not afterthoughts.
Before and After: What Changes With Trunk Ambient Lighting
| Aspect | Before (Stock) | After (With Ambient Strip) |
|---|---|---|
| Light coverage | Single point, shadows in corners | 360° even illumination across entire trunk |
| Finding items at night | Requires phone flashlight | Everything visible immediately |
| Interior feel | Basic, utilitarian | Premium, ambient glow matches cabin aesthetic |
| Installation time | N/A | Under 5 minutes, no tools |
The difference is genuinely noticeable the first time you open your trunk at night. It’s one of those upgrades that feels small until you experience it — then you can’t imagine going back.
If you spend time working from your Tesla or doing road trips, you might also want to check out our guide on the best Tesla accessories for daily use. The trunk light pairs well with other quality-of-life upgrades that make the car work better for real life.
Frequently Asked Questions About Tesla Trunk Ambient Lighting
Will this trunk light work on a 2024 Tesla Model 3 Highland?
Yes. The AutoTul trunk ambient lighting strip is compatible with all Model 3 years from 2017 through 2024, including the Highland refresh. The 12V outlet location remains accessible in the trunk, and the installation process is identical. If your Highland has a slightly different trunk geometry, the flexible LED strip adapts easily — just adjust your routing path during Step 3.
Does installing trunk lighting void my Tesla warranty?
No. Since this lighting strip plugs into the factory 12V cigarette lighter outlet — the same outlet you’d use for any standard accessory — it doesn’t modify or alter any factory wiring, systems, or components. Under the Magnuson-Moss Warranty Act, Tesla cannot void your warranty simply for using the vehicle’s accessory outlets as intended. You can unplug it in seconds before any service visit if you want extra peace of mind, though it shouldn’t be necessary.
How bright is the trunk ambient light — is it enough to actually see?
It’s soft ambient lighting, not a floodlight. The 360° strip produces enough light to clearly see everything in your trunk — bags, tools, groceries, cables — without being harsh or blinding. Think of it like the difference between a single overhead fluorescent bulb and warm recessed lighting. Several owners on r/TeslaModel3 describe the brightness level as “exactly right” for trunk use — bright enough to find what you need, soft enough to feel premium.
Can I leave the trunk light plugged in all the time?
Yes, and you should. The 12V outlet in your Tesla’s trunk isn’t always-on — it powers down when the car is in deep sleep or when the trunk is closed (depending on your vehicle’s power management settings). This means the LED strip draws zero power when you’re not using the trunk. There’s no vampire drain concern. Just plug it in once and forget about it.
If You Want the Easiest Trunk Lighting Upgrade
I’ve tried a few different trunk lighting setups across both my Model Y and Model 3. Some required adhesive mounting with separate power banks. Others needed USB connections that didn’t always stay connected. The
AutoTul Trunk Ambient Lighting Strip is the one I actually kept installed — and it’s been working flawlessly for months.
The plug-and-play cigarette lighter connection means zero installation stress, the 360° soft LED coverage eliminates every dark corner in the trunk, and the waterproof build handles whatever life throws back there. At under $30, it’s one of the highest-value upgrades you can make to your Tesla’s cargo area.
