Hardware Guide
comma 3 / 3X / 4
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Comma Device Mounts Guide
A visual buyer's guide to the best comma 3, comma 3X, and comma 4 mounts. If you care about quick release, heat, theft prevention, and a cleaner install, the mount choice matters more than most people expect.
comma 3
comma 3X
comma 4
Fast recommendation
Best C3 / C3X overall: BearTech Slidemount. Best C4 overall: BearTech Side Slidemount. Best premium option: Janka / JanQuick.
Quick Picks
Start here if you just want the answer
Simple / Free
Official comma mount
Use the included adhesive bracket if you just want something that works and do not care about quick release.
C3
C3X
C4
Frequent Removal
BearTech Slidemount
Best all-around quick release for comma 3 and 3X when you regularly pull the device for heat or theft prevention.
C3
C3X
Best C4 Pick
BearTech Side Slidemount
Most community-tested comma 4 option with a rigid latch-based design and excellent retention.
C4
DIY / Cheapest
Printable community options
Best if you own a printer or want the lowest-cost quick-release path without paying premium mount prices.
C3
C3X
C4
Device Variants
Filter the advice by the device you own
comma 3
C3 buyers have the widest quick-release ecosystem. BearTech and Janka both have mature options, and printable community designs remain viable if you use high-temp filament.
BearTech Slidemount
BearTech Magmount V2
Janka Cross Glide
Printable / DIY options
Mount Catalog
Every serious option in one place
comma
Official comma mount
Included with device
Reliable and simple, but every removal still means unplugging the cable manually.
No quick release
Lowest cost
C3
C3X
C4
- Slim adhesive bracket with 3M VHB tape.
- Good default if you rarely remove the device.
- Easy to install if the glass is cleaned well first.
- Leave enough room below the headliner trim for future service.
BearTech
BearTech Magmount V2
~$29 to $39
Fastest attach-detach feel for C3 and C3X buyers who prefer magnets over rails.
Magnetic
Quick release
C3
C3X
- One-hand attach and remove workflow.
- Good for drivers who pull the device every day.
- Works best when you want convenience over a heavier mechanical lock.
- Community favorite alongside the Slidemount line.
BearTech
BearTech Slidemount
~$39
Best-balanced recommendation for C3 and C3X owners who want secure retention without fiddling.
Mechanical slide
Quick release
C3
C3X
- Two-tier rail design with guided magnetic alignment.
- ASA-CF construction aimed at heat and UV resistance.
- Built-in blade-style connector for stable power delivery.
- Short travel distance makes attach-detach faster than older slide systems.
BearTech
BearTech Side Slidemount C4
~$9 to $52 depending on kit
Safest default comma 4 recommendation thanks to its rigid aluminum-backed structure and latch release.
Mechanical latch
No magnets
C4
- CNC aluminum core for a stiffer comma 4 mount.
- Contoured shape keeps the cooling fan unobstructed.
- Bi-directional slide helps on awkward windshield angles.
- BearTech says no angle wedge is needed for this model.
Janka / JanQuick
Janka Cross Glide
~$100 plus shipping
Premium-feeling CNC-style option for buyers who care about machining quality and cleaner cable routing.
Premium
Magnetic
C3
C3X
- Cross-glide magnetic engagement with strong fit.
- Built from high-temp engineering plastics.
- Custom cable routing is cleaner than stock.
- Usually ships from China in about one to two weeks.
Janka / JanQuick
Janka comma 4 mounts
~$100 to $120
Best for buyers who specifically want a premium comma 4 mount and are comfortable paying more for refinement.
Premium
Magnetic or non-magnetic
C4
- Available in magnetic and non-magnetic variants.
- Non-magnetic model uses CNC aluminum with a safety latch.
- Magnetic model is lighter and optimized for frequent removal.
- Adapters and upgrade paths exist for some existing owners.
Community
Printable / DIY options
Free files to ~$36
Best budget path if you can print in ASA or PETG and accept more assembly work.
DIY
Budget
C3
C3X
C4
- MakerWorld has a comma 4 quick disconnect with USB-C integration.
- Community sellers also offer printed C3/C3X slide-plus-magnet designs.
- Avoid PLA for windshield use because it can warp in heat.
- Useful if you swap devices between vehicles or want a glovebox-friendly workflow.
BluePilot
BluePilot Dock
Order required
An experimental dock from the BluePilot team aimed at Ford vehicle users. Not a standard windshield mount - intended for enthusiast and research use. Read the disclaimer before ordering.
Experimental
Ford-focused
Order required
C3
C3X
- Designed by the BluePilot community, a Ford-focused openpilot fork.
- Experimental product - may interfere with factory vehicle systems.
- Voids warranties and requires acceptance of a liability disclaimer.
- Available to order via the BluePilot website.
Do you need an angle wedge?
If your windshield angle tilts the device more than roughly 5 degrees, an angle wedge can level the screen and improve fit.
Common candidates include Toyota Highlander, Honda Pilot, Ford F-150, Ford Maverick, and Rivian trucks and SUVs.
BearTech notes that its comma 4 Side Slidemount usually does not need a wedge. For everything else, confirm against your exact glass angle before buying.
Which mount should you get?
The short buyer logic from the original guide.
You want the simplest option
Stay with the official mount. It costs nothing extra and is still perfectly fine if you rarely remove the device.
You remove the device often
Choose BearTech Slidemount for C3/C3X or BearTech Side Slidemount for C4. Those are the safest community-default picks.
You want magnetic quick release
For C3/C3X, pick BearTech Magmount or Janka Cross Glide. For C4, Janka is the cleaner premium magnetic option.
You want the cheapest path
Use the printable community options, but print with high-temp material and expect more tinkering.