1. The "luxury" car air freshener: $89. It's a cardboard tree. 2. The steering wheel cover: makes the wheel thicker, slips, squeaks. 3. The dashboard phone mount: falls off at the first corner. 4. The car seat organiser: full of receipts within a week. 5. The "personalised" number plate frame. 6. The car vacuum cleaner: your mother already has one.
What to buy instead: a tank of petrol. Fill her car up. It costs $80-$120, it's genuinely useful, and it says "I thought about what you actually need".