If it was a reasonably large purchase cost, the fact you purchased it in 2015 may not affect your right to repair, replacement or refund. Sony would be aware of this fact under ACL that their warranty period is only in addition to your rights under ACL.
From the ACCC site on Warranties:
"A warranty is a voluntary promise offered by the person or business who sold the product or service to you. Once you buy the product or service, the promise becomes a right that can be enforced under the ACL.
Warranties are separate from your automatic consumer guarantees. The consumer guarantees which apply regardless of any warranties suppliers sell or give to you, apply for a reasonable time depending on the nature of the goods or services. This means consumer guarantees may continue to apply after the time period for the warranty has expired."
From the ACCC site on "Consumer Guarantees":
"Since 1 January 2011, the following consumer guarantees on products and services apply.
Products must be of acceptable quality, that is:
- safe, lasting, with no faults
- look acceptable
- do all the things someone would normally expect them to do.
Acceptable quality takes into account what would normally be expected for the type of product and cost.
Products must also:
match descriptions made by the salesperson, on packaging and labels, and in promotions or advertising
match any demonstration model or sample you asked for
be fit for the purpose the business told you it would be fit for and for any purpose that you made known to the business before purchasing
come with full title and ownership
not carry any hidden debts or extra charges
come with undisturbed possession, so no one has a right to take the goods away or prevent you from using them
meet any extra promises made about performance, condition and quality, such as life time guarantees and money back offers
have spare parts and repair facilities available for a reasonable time after purchase unless you were told otherwise.
- be provided with acceptable care and skill or technical knowledge and taking all necessary steps to avoid loss and damage
- be fit for the purpose or give the results that you and the business had agreed to
- be delivered within a reasonable time when there is no agreed end date.
Consumer guarantees on products and services also apply to:
- bundled products and services
- gifts with proof of purchase
- sale items
- online products and services bought from Australian businesses
- second-hand products from businesses, taking into account age and condition."