Just changed mine, hardest bit was getting the 10mm mounting bolt out as its in tight location.
Before you start make sure you have correct filter ... Don't ask!
The connections pull off quite easy but watch for fuel spillage, have a rag ready.
Remove battery connection before starting.
It's a tight fit between the air filter and the bulkhead to get the thing out but slight tug and out it comes , pull the electrical connector off the bottom as you slip the canister through.
The new filter will come with a whit plastic plug at the bottom , this has the new washer fitted to it...
Refit is quite straight forward too...
Replace battery connection.
When fitted turn ignition on without starting , listen to fuel gurgling through, repeat. 5 to 6 times til gurgle stops , you can then start the engine.
I got
this one from comline on eBay for £15.99
I didn't trigger any lights when I changed mine, and didn't need to purge any air...
Good luck..