Mount guide
Pick a mount for your comma device
Choose your device first. The included mount is fine for occasional removal; a quick-release mount is worth it when you take the device down often.
The short answerJanka / JanQuick for comma 4. BearTech Slidemount for comma 3X or comma 3. Keep the official mount when simple and free matters most.
Choose your device
comma 4 and 3X are shown first.
comma 4
Start here
Recommended
Janka / JanQuick
The polished quick-release pick. Choose BearTech Side Slidemount instead when value matters more.
Official mount
BearTech Side Slidemount
Printable / DIY
comma 3X
Best balance
Recommended
BearTech Slidemount
A secure quick release for frequent removal. Use the included official mount if you rarely remove the device.
Official mount
BearTech Magmount V2
Janka Cross Glide
comma 3
Same fit as 3X
Recommended
BearTech Slidemount
The comma 3 shares the mature 3X mount ecosystem, including magnetic and printable alternatives.
Official mount
BearTech Magmount V2
Printable / DIY
Choose by what matters to you
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. For comma 4, Janka now gets the top nod if you want the nicest quick-release setup, while BearTech stays the better value pick.
You want magnetic quick release
For C3/C3X, pick BearTech Magmount or Janka Cross Glide. For C4, Janka is the top magnetic recommendation.
You want the cheapest path
Use the printable community options, but print with high-temp material and expect more tinkering.
Compare all eight mount options
Prices, fit, strengths, and source or purchase links.
OpenClose
Compare all eight mount options
Prices, fit, strengths, and source or purchase links.
Janka / JanQuick
Janka comma 4 mounts
~$100 to $120
Top current comma 4 recommendation if you want the most polished quick-release hardware instead of the cheapest workable option.
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.
comma
Official comma mount
Included with device
Reliable and simple, but every removal still means unplugging the cable manually.
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.
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.
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
Strong value-oriented comma 4 pick with a rigid latch-based design if you want to spend less than Janka.
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.
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.
Community
Printable / DIY options
Free files to ~$36
Best budget path if you can print in ASA or PETG and accept more assembly work.
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.
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?
Consider one if the windshield tilts the device by more than roughly 5 degrees. Confirm fit for your exact car before buying. BearTech says its comma 4 Side Slidemount usually does not need one.
Using a printable mount?
Use heat-tolerant material such as ASA or PETG. Avoid PLA on a windshield because summer cabin heat can deform it.