To apply for a personal loan to purchase an Ather 450X Gen 3, you need to follow these steps:

1. **Check Eligibility**: Ensure you meet the basic criteria, such as being at least 21 years old, having a maximum age of 60 at loan maturity, and a minimum net monthly income of ?15,000[2).

2. **Gather Documents**: Collect necessary documents including a completely filled-out loan application form, KYC documents , proof of date of birth , signature proof , latest 2 months pay slips, latest 2 months bank statements showing salary credits, and one year employment proof[2).

3. **Submit Application**: Provide your mobile number, PAN, pincode, and employment status. Verify your mobile number and email ID, and submit additional personal and employment information. Digitally verify your identity and address, and provide bank account details for verification[2).

4. **Review and Sign Loan Agreement**: Carefully review the loan agreement, digitally sign it, and validate it using a 6-digit OTP sent to your registered mobile number[2).

5. **Loan Disbursal**: Once approved, the loan amount can be transferred to your account within a short period, often within 30 minutes[2).

The documents required are essentially proof of identity, address, income, and employment, along with a filled-out loan application form and any additional documents specified by the lender.