Vehicle Questions and Answers
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The 2003 Nissan Altima did not come with a built-in AUX input. To add one, you will have to purchase and install an aftermarket kit, which can cost between $20 and $60. Before buying a kit, you will need to remove your current radio by unbolting it to check if it has the necessary port. The radio is held in place by 6 bolts. After removing them, take out your stereo and examine the back to see if there is an available port for installation.
The 2003 Nissan Altima does not have an auxiliary port for connecting external devices.
No, however, you can quickly and affordably fix that issue by installing an aftermarket head unit.