How to Set Up Bluetooth on Your Car Radio: Pairing Steps by Brand

To set up Bluetooth on a car radio, park the vehicle, open the radio’s add-device menu, select the radio on your phone and confirm the code both screens show. The menu names depend on the maker: Toyota’s 2019 Entune guide starts at Setup, Honda’s 2021 CR-V guide at the Phone button, and Sony’s XAV-AX8500 help guide at Settings, then Device Connection. This guide puts those paths side by side, adds the phone-side steps from Apple and Google, and lists the pairing limits and delete paths the manuals state. Facts come from the pages named below, checked on October 26, 2026, and differ by model year.

What Is Car Bluetooth and Why Use It?

Hyundai’s online owner’s manual describes Bluetooth as a short-range wireless technology and says its system supports the Bluetooth Handsfree and Audio features. Honda’s 2021 CR-V guide says its HandsFreeLink system lets you place and receive calls through the vehicle’s audio system. Before either works, the phone and radio must be paired; Sony’s XAV-AX8500 guide calls this mutual registration, and Android Help says paired devices stay paired until you unpair them.

General Steps to Connect Your Phone

Getting Your Car Radio Ready

• Park first. Honda’s guide says you cannot pair while the vehicle is moving; Chevrolet’s support page says to keep it in Park; Ford’s page says the vehicle must be parked and running, in an open location free of overhead foliage and ceilings.
• Allow start-up time. The Mazda Connect manual says Bluetooth may not operate for 1 or 2 minutes after the ignition is switched to ACC or ON, which does not indicate a problem.
• Keep other phones away. A Mazda6 manual page notes a range of about 10 meters (32 ft), so a nearby device may be paired unintentionally while another is being paired.

Making Your Phone Discoverable

Apple’s guide says to put the accessory in discovery mode, then open Settings, then Bluetooth on the iPhone and make sure Bluetooth is on; the iPhone must be within about 33 feet (10 meters). On Android, Google’s help article says to swipe down from the top of the screen, touch and hold Bluetooth, and tap Pair new device. Ford’s page says discoverability on older SYNC systems is normally timed, so work quickly.

Completing the Connection

Honda’s guide says to confirm that the pairing code on the screen and your phone match. Ford’s SYNC 3 steps say to confirm a 6-digit PIN. Mazda Connect says a device on Bluetooth 2.0 or lower needs a 4-digit passcode, while a 2.1 or higher device should show the same 6-digit passcode as the center display. The Hyundai and Kia manuals say that if the phone asks for a passkey, enter 0000, and if a 6-digit passkey appears, confirm it matches the system screen.

Sony differs. Its XAV-AX8500 guide says the unit will not prompt you to enter a 6-digit passkey, and that a passkey request on the phone may be a fraud attempt by a third party. Google’s Android Help, by contrast, suggests trying 0000 or 1234 if you are asked for a passcode you do not have, so the two sources differ on whether a typed passcode is expected.

Pairing Steps by Car Brand

Maker and system	Start the pairing	Then on the phone
Toyota Entune (2019 guide)	Home screen Setup button (faceplate on Entune Audio), Bluetooth, Add	Select your Toyota in Bluetooth settings; enter the provided PIN if asked
Honda 2021 CR-V (color audio)	Phone or Pick-up button, select Yes	Select HandsFreeLink, confirm the pairing code
Ford SYNC 3	Phone button, Add Bluetooth Device	Select SYNC, confirm the 6-digit PIN
Ford SYNC 4 / 4A	Settings, Add a Phone	Verify the passcode and pair
Chevrolet (support page)	Phone icon, then Add Phone, Pair Device, Connect Phone or +; or Settings, Bluetooth, Pair New Device	Select the vehicle, confirm the code, touch Pair
Hyundai and Kia (online manuals)	PHONE button, Phone settings, Add new device	Select the vehicle; enter 0000 or confirm the 6-digit passkey
Mazda Connect	Settings, Connectivity Settings, Bluetooth Settings, Pair New Device, Continue	Select the device, or Pair from Mobile Device and select “Mazda” on the phone

Honda’s guide says the system times out and returns to idle if the phone is not paired within three minutes. Chevrolet’s page also offers a voice route: press Push-to-Talk briefly and say “Pair Phone.” Toyota’s guide says you may need to allow Entune access to messaging and contacts on the phone afterward. For Ford, support page lists steps for every SYNC generation and Ford Digital Experience.

Aftermarket Head Units: Pioneer and Sony Examples

The makers’ own manuals use their own menus. For what a touch-screen receiver offers, see the touch screen receiver comparison.

Pioneer DEH-6400BT. Its operation manual says to hold PHONE to open the connection menu and choose Add device. Press the M.C. knob to search, turn it to select the device, and press it to connect. Check the device name (Pioneer BT Unit) and enter the PIN on your phone if necessary; the default PIN is 0000. If the unit cannot complete the connection, the manual says to connect from the device instead.

Sony XAV-AX8500. Sony’s help guide says to place the phone within 1 m (3 ft), press HOME, touch Settings, Device Connection, then +Add New Device, and select “XAV-AX8500” on the phone. A Pairing Request appears on the unit: confirm the 6-digit passkey and touch Pair. The unit connects to one device at a time and, with the ignition on and Bluetooth active, reconnects to the last device automatically.

Connecting Different Phone Types

Android Phone Connection

Google’s Android Help article on setting up Bluetooth devices gives these steps (some work only on Android 15 and up):

1. Swipe down from the top of the screen, then touch and hold Bluetooth.
2. Tap Pair new device; if it is missing, check under Available devices or tap More, then Refresh.
3. Tap the Bluetooth device’s name and follow the on-screen instructions.

The article also says you can set a device’s Audio device type to Car under Settings, Connected devices, Media devices, and remove a device by opening its settings and tapping Forget.

iPhone Connection

Per Apple’s iPhone User Guide page on Bluetooth accessories, put the accessory in discovery mode, open Settings, then Bluetooth, and tap the accessory’s name; you might need its PIN or passcode. To unpair, tap the More Info button next to it, then Forget This Device, then Forget Device. Apple’s article on third-party accessories (published December 18, 2025) says unpairing removes the accessory on all devices signed in to your Apple Account.

Pairing Limits and Clearing Old Pairings

System	Stated limit	Delete path in the page read
Honda 2021 CR-V	Six phones	Bluetooth Device List, select the phone, Delete, Yes
Hyundai and Kia manuals	Five devices; one connected at a time	PHONE, Phone settings, Delete devices, Yes (stored contacts and call history are also deleted)
Mazda Connect	Five devices	Bluetooth Settings, Delete Paired Device; also delete “Mazda” on the phone before re-pairing
Mazda6 manual page	Seven devices	Voice command: say Delete and the device name
Pioneer DEH-6400BT	Three; shows Device Full	Hold PHONE, Delete device, select it, Delete YES
Chevrolet support page	Usually one active connection	Bluetooth Settings, select the device name, Delete

Chevrolet’s page recommends removing the pairing on both sides, then turning the vehicle off, opening and closing the door, waiting two minutes and pairing again. It says the system defaults to the last paired device and works down the list, so delete an old phone the vehicle keeps trying to reach.

Troubleshooting Common Connection Issues

Phone Not Finding Car Radio

• Honda: if the phone does not appear, select Refresh and search from the phone, then select HandsFreeLink.
• Mazda Connect: select Pair from Mobile Device at the top of the list, then select “Mazda” on the phone.
• Pioneer DEH-6400BT: if it shows Not found, connect from the phone using the name Pioneer BT Unit.

Connection Fails After Pairing

• Apple Support (December 12, 2025): turn the accessory off and on; if it was connected before, unpair it, return it to discovery mode and pair again.
• Hyundai and Kia manuals: turn Bluetooth off and on at the device, or unregister the pairing on both the system and the device and re-register.
• Chevrolet: update phone and infotainment software, restart both, then delete and re-pair. A call can move back to the phone if the engine is off and the vehicle times out of accessory mode.

If those fail, Ford’s page points owners to the Ford Customer Relationship Center and the owner’s manual. See also why Bluetooth stops working in a car and why it keeps disconnecting.

When Your Radio Has No Bluetooth

The UGREEN adapter above plugs into a 3.5mm aux port, per its Amazon listing, and the phone-side steps are the Apple and Android steps above. The listing says it can connect two phones with one audio output at a time. Check the listing for current price and availability. To add an aux input first, see how to add an aux port to your car; for adapters, see how to add Bluetooth to a car stereo, Bluetooth adapters for car audio and do you need a new radio for Bluetooth.

Frequently Asked Questions

What PIN or code do I enter to pair a phone?

Often no typing is needed: the Honda, Ford, Mazda and Sony pages describe matching a code shown on both screens. Where a PIN is requested, the Pioneer DEH-6400BT manual and the Hyundai and Kia manuals give 0000 as the default, as does Honda’s 2021 CR-V guide for its pairing code. Sony’s guide warns that a passkey request on the phone may indicate fraud by a third party.

Can I pair my phone while driving?

The manuals say to park first. Honda’s 2021 CR-V guide says you cannot pair while the vehicle is moving, a Mazda6 manual page says pairing ends if the vehicle starts to move, and Pioneer’s DEH-6400BT manual asks you to apply the parking brake.

How many phones can a car radio remember?

Honda’s 2021 CR-V guide says six, the Hyundai, Kia and Mazda Connect manuals say five, a Mazda6 manual page says seven, and the Pioneer DEH-6400BT allows three before it shows Device Full. Delete one first if the list is full.

Why won’t my phone pair while Apple CarPlay or Android Auto is connected?

Honda’s guide says HandsFreeLink is unavailable on Display Audio models during an active CarPlay or Android Auto connection, and Mazda Connect says to disconnect Android Auto before registering a device. Sony’s XAV-AX8500 guide says Bluetooth connection is not possible while either runs, but pairing is possible on its Device Connection screen.

Putting It All Together

Bluetooth setup comes down to parking, opening the radio’s add-device menu, selecting the radio on the phone and confirming the code. Brand walkthroughs on this site: Toyota, Chevy Malibu, Sony stereo and resetting Pioneer Bluetooth. This guide does not cover Kenwood or JVC units, hands-free calling or every model year; check your owner’s manual.