# New radio now car won’t start

**URL:** <https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719>\
**Category:** Maintenance/Repairs\
**Tags:** b3000, mazda\
**Created:** [August 14, 2021, 5:25am UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719 "2021-08-14T05:25:04Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![Rileyb7\_176711](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rileyb7\_176711](https://community.cartalk.com/u/Rileyb7_176711)\
**Post date:** [August 17, 2021, 8:51pm UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719/22 "2021-08-17T20:51:50Z")

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Thanks, the after market radio is from my other bt50 which i also installed and it is the same gen model. And it had no problems. They have the exact same stock radio and everything.

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [August 17, 2021, 8:57pm UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719/23 "2021-08-17T20:57:49Z")

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I would retrace my steps, check all fuses and relays. look for a missed wire that is not connected or a burnt wire, check the immobilizer fuse as Nevada said.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/48514_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [August 17, 2021, 9:11pm UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719/24 "2021-08-17T21:11:28Z")

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> [@Rileyb7\_176711](#):
>
> it had no problems. They have the exact same stock radio and everything.

… but, if the anti-theft system requires communication with a **specific** Mazda radio (the same one with which it was originally paired), therein could lie the problem. I am merely speculating, and I hope that the dealership will come to your rescue with a relatively easy “fix”.

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [August 17, 2021, 9:50pm UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719/25 "2021-08-17T21:50:27Z")

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OP did reinstall original radio. No luck.

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**Author:** ![Rileyb7\_176711](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rileyb7\_176711](https://community.cartalk.com/u/Rileyb7_176711)\
**Post date:** [August 17, 2021, 9:55pm UTC](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719/26 "2021-08-17T21:55:26Z")

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I’m doing some research and I reckon it could be the key is the problem. The key is coded to the immobiliser. The guy I bought the car off has mailed me the spare so I guess I’ll try that when it comes in the mail.

[Previous page](https://community.cartalk.com/t/new-radio-now-car-won-t-start/178719.md?page=1)