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No, Proton Saga isn't available in Front/Rear Side Airbags.

Here are the Front/Rear Side Airbags and variants of Proton Saga:

The Bezza is better in terms of fuel economy, boot space and safety features.
The Saga is better in terms of ride and comfort.  

Here are the Autonomous Emergency Braking and variants of Proton Saga:

Here are the ABS/EBD and variants of Proton Saga:

Here are the Front/Rear Curtain Airbags and variants of Proton Saga:

Yes, Proton Saga is available in Security Alarm. The available Security Alarm variants are: 2019 Proton Saga 1.3L Standard MT, 2019 Proton Saga 1.3L Standard AT, 2019 Proton Saga 1.3L Premium AT, 2018 Proton Saga 1.3 Standard MT, 2018 Proton Saga 1.3 Standard CVT, 2018 Proton Saga 1.3 Executive CVT, 2018 Proton Saga 1.3 Premium CVT.

Yes, Proton Saga is available in Folding Wing Mirrors. The available Folding Wing Mirrors variants are: 2019 Proton Saga 1.3L Standard MT, 2019 Proton Saga 1.3L Standard AT, 2019 Proton Saga 1.3L Premium AT.

Here are the wheelbase(mm) and variants of Proton Saga:

Here are the Airbag Disable Function and variants of Proton Saga: