How to Identify Your Q50 Tesla Screen Version (MK5, MK6, MK7)

If you're trying to update your firmware, troubleshoot an issue, or figure out what the previous owner installed — the first thing anyone will ask you is: "What version is it?" Here's how to find out, what the differences actually mean, and why "MK6" isn't a precise enough answer for firmware compatibility.

• "Mark" versions (MK5, MK6, MK7) refer to hardware generations — different processors, different capabilities, different firmware files
• The MCU version string is your exact hardware fingerprint — two MK6 units can have different MCU versions and need different firmware
• Flashing the wrong firmware for your hardware bricks the unit — matching MCU before downloading is non-negotiable
• Sellers don't always label versions accurately — verify from the unit itself, not from the listing

Where to Find Your Version Info

The About screen: your source of truth

Everything you need is on one screen. On your Tesla-style head unit, go to:

Settings → About Device (or Settings → System → About, depending on firmware)

You're looking for three pieces of information:

1. Android version — tells you the OS generation (Android 10, 12, 13, 14)
2. MCU version string — the exact hardware identifier (looks like "MCU_Q680_V3.2.1" or similar). This is the fingerprint.
3. Model/build number — sometimes labeled "Device model" or "Build number." May include references like "PX6," "SD680," "SD665," "SD8+" that indicate the processor.

Take a screenshot or photo of this entire screen. This single image is what support teams, forum members, and firmware databases need to identify your exact hardware and match you to the correct update.

Physical labels on the unit and CAN decoder

If the screen is already removed or you're looking at a unit before installing it:

• Check the back of the unit for a sticker with model numbers, serial numbers, and hardware identifiers
• Check the CAN decoder box — it usually has a version label that corresponds to the screen hardware
• Check the harness connectors — some generations use different connector types or pin counts

Physical labels are a good starting point, but the About screen is definitive. Labels can be wrong (mislabeled in the factory) or misleading (a refurbished unit with a new label). The software version info can't lie.

MK5, MK6, MK7: What's Actually Different

Mark 5 (MK5) — the legacy generation

MK5 units are the oldest generation you'll commonly find in Q50s. Key characteristics:

• Processor: Typically PX5 (RK3368) or PX6 (RK3399) — older ARM chips
• Android version: Usually Android 9 or 10
• RAM: 2-4GB
• Storage: 32-64GB
• Performance: Noticeably slower than newer generations, especially with modern apps. CarPlay and Android Auto work but can feel laggy
• Boot time: 25-40 seconds typical
• Firmware updates: Largely discontinued — most sellers have moved on to MK6/MK7 firmware development

If you have an MK5, it still works for basic functions. But new features, security patches, and compatibility with newer phones are increasingly limited. This is the generation where "should I upgrade the unit" becomes a genuine question.

Mark 6 (MK6) — the current workhorse

MK6 is the most common generation in the wild right now. Most Q50 Tesla screens sold in 2023-2025 are MK6 units.

• Processor: Qualcomm SD665 or SD680 (6-series Snapdragon)
• Android version: Android 12 or 13 (firmware dependent)
• RAM: 4-8GB (varies by configuration)
• Storage: 64-128GB
• Performance: Smooth for daily use — handles CarPlay, Android Auto, navigation, and streaming apps without drama
• Boot time: 15-25 seconds typical
• Notable: No HDMI output (can't mirror to an external cluster display)
• Firmware updates: Actively maintained by most sellers including SquareWheels

The critical detail with MK6: there are multiple board revisions within the MK6 family. An early MK6 from mid-2023 may have a different MCU than a late MK6 from early 2025. This is why "MK6" alone isn't enough to identify the right firmware — you need the MCU string.

Mark 7 (MK7) — the current flagship

MK7 is the newest generation, with hardware improvements that make a real difference for daily use and integration.

• Processor: Qualcomm SD8+ Gen 1 or equivalent (8-series)
• Android version: Android 13 or 14
• RAM: 8-12GB
• Storage: 128-256GB
• Performance: Noticeably faster than MK6 — quicker app launches, smoother multitasking, better handling of heavy apps
• Boot time: Instant via fastboot
• HDMI output: Available — can mirror display to an APEX digital cluster or external display
• Improved modem: Better 4G LTE connectivity for SIM-based internet
• Firmware updates: Actively maintained

The MK7's HDMI output is the single biggest feature differentiator vs MK6. If you plan to pair your screen with an APEX cluster and want display mirroring, the MK7 is the right choice. If you don't need HDMI and the MK6 is in budget, the MK6 still handles daily driving duties well.

Why MCU Version Matters More Than "MK" Number

Same MK, different boards

This is the detail that trips people up and causes bricked units. Within each Mark generation, manufacturers produce multiple board revisions — different MCU chips, different pin configurations, different firmware requirements. Two MK6 units that look physically identical can have different MCU version strings.

What happens when you flash the wrong firmware:

• Best case: The update fails and the unit stays on the old firmware (no harm done)
• Medium case: The update installs but specific functions break — dead steering wheel controls, no audio, broken camera
• Worst case: The unit bricks — stuck on logo, black screen, or boot loop that can't be recovered at home

The MCU string prevents all three scenarios. Match it before you download, and none of this happens.

How to match your MCU to the right firmware

1. Take a photo of Settings → About → MCU info
2. If using SquareWheels support downloads: find your vehicle, find your Mark generation, and confirm your MCU string is listed in the compatibility notes
3. If the MCU string isn't listed, contact support before downloading. They can identify the correct file from your MCU string
4. If downloading from a forum or Facebook group: ask the uploader which MCU versions the file was tested on. If they can't answer, don't flash it

Identifying a Screen You Didn't Buy

The used car scenario

Buying a Q50 with a Tesla screen already installed is increasingly common. The previous owner may not have told you anything about it — or they may have told you "it's a Mark 7" because that's what the seller told them, whether it's accurate or not.

To identify what you actually have:

1. Settings → About: Get the Android version, MCU string, and model number
2. Check the processor: If the About screen mentions "SD665" or "SD680" → MK6. If it mentions "SD8+" or "SM8475" → MK7. If it mentions "PX6" or "RK3399" → likely MK5
3. Test for HDMI: Look at the back of the unit (if accessible) for an HDMI port. If it has one → likely MK7. If not → MK6 or older
4. Boot time: Under 15 seconds = likely MK7. 15-25 seconds = likely MK6. Over 25 seconds = likely MK5 or an MK6 with quick boot disabled
5. Check the CAN decoder: Different generations typically pair with different decoders. The decoder label may have a model number that cross-references to the screen generation

Identifying the seller/brand

If you want to know where the screen came from (for support or firmware updates):

• Look for branding on the boot screen — some sellers have custom boot logos
• Check the default launcher — SquareWheels, AuCar, and others sometimes have customized home screens
• Check for pre-installed apps — some sellers include their own support or update apps
• If nothing is identifiable, send photos to support@squarewheelsauto.com — Lina can usually identify the origin from the About screen info and CAN decoder model

What Version Should You Buy in 2026?

For new purchases: MK7 unless budget is tight

If you're buying a Tesla-style screen today, the MK7 is the right choice for most people. The faster processor, HDMI output for APEX cluster pairing, and better RAM/storage make the daily experience noticeably smoother. The price premium over MK6 is typically $100-200 — worth it for the hardware lifecycle you'll get.

For budget builds: MK6 still works

A well-configured MK6 from a reputable seller with proper firmware, a vehicle-specific harness, and active support is still a solid daily driver. You won't get HDMI output or the fastest boot times, but CarPlay, Android Auto, navigation, and streaming all work without issues. If the MK7 premium doesn't fit the build budget, an MK6 isn't a compromise — it's a different price point for a still-capable unit.

For MK5 owners: consider upgrading

If you're on an MK5 and experiencing performance issues (slow app launches, laggy navigation, CarPlay disconnections), the hardware is likely the bottleneck. Firmware updates for MK5 units are sparse, and modern phone OS versions are increasingly pushing beyond what the MK5's processor can handle smoothly. An upgrade to MK6 or MK7 will feel like a completely different device.

Browse the G-Series Tesla-style screen collection for current availability and pricing across all hardware generations.

Final Thoughts

Knowing your screen version isn't optional — it's the first step in every firmware update, every support interaction, and every troubleshooting session. Take 30 seconds to photograph your About screen and save the MCU string somewhere accessible. That single image will save you hours of guessing and protect you from flashing the wrong file.

If you're unsure what you have or what firmware you should be running, email support@squarewheelsauto.com with that About screen photo. Lina handles these identification requests daily and can match you to the right resources in one reply.

Frequently Asked Questions

Can I upgrade my MK6 to MK7 through a firmware update?

No — MK6 and MK7 are different hardware. The Mark number refers to the physical board, processor, and chipset inside the unit, not a software version. You can update the firmware within your Mark generation (e.g., MK6 firmware v3.0 to v3.5), but you can't turn an MK6 into an MK7 through software. That requires replacing the physical unit.

Why do some sellers list their units as "MK7" when the About screen shows MK6 specs?

Marketing inconsistency. Some sellers use "MK7" loosely to mean "latest version" even when the hardware is a late-revision MK6 with updated firmware. This is why the About screen is your source of truth — not the product listing. Check the processor model: SD665/SD680 = MK6, SD8+/SM8475 = MK7. If a seller advertises MK7 but the unit shows an SD665 processor, you have an MK6.

I found a firmware file on Reddit that says it works for all MK6 units. Is it safe?

"All MK6 units" is a red flag. There are multiple board revisions within the MK6 family, each with different MCU versions. A firmware file tested on one MK6 board variant may not be compatible with another. Before flashing any file from a forum or community, get the MCU compatibility list from the uploader. If they can't provide one, the file is untested for your specific hardware and flashing it is a gamble. Use our firmware update guide for the safe process.