I too have never have to pay for a courtesy car for all the cars I've owned, and I've owned a Toyota (used import tho), a Mitsubishi and 2x Hondas. However as @eracode alluded to I have to request it in advance, at the time of booking the service. In fact one time I've had to pick a service date to fit in when the courtesy car is available at the dealerships.
Having said that, I've only had to request a courtesy car when we moved up to Auckland (with Honda). When we were living in Welly I didn't have to request for a courtesy car as the dealerships are all in the City and within walking distance from the office, and as I don't need to use the car during the day, I simply drop the car off at the dealer in the morning, then walk to work. Will walk back to dealership in the afternoon to pick up the car before heading home. I must say though on a few occasions Honda Cars Wellington did ask if I need a ride to work etc when dropping off my car in the morning.
Would be interesting to see Honda Cars East Tamaki will charge for a courtesy car when I next book it in for service, which is not due until end Oct.
Edit: Fixed some typos/grammar
I booked a service at Honda East Tamaki for August. They do not charge for loan car.
Just need to book 2-3 weeks in advance.
Also if you have a great relationship with sales person who can arrange current model as test drive / loan car for 2-3 hours it takes to service.
Cheers for that mate, that's good to know. When I dropped my car for servicing last year I was given a late model HRV as a courtesy car, quite a nice car I must say. In the past I've been given a Honda Insight.
Edit: Fixed those darn typos again!
Guys at work said Giltrap is still free so no problem for me to go there over Continental in New Market.
It did get us thinking though - If you charge a fee its really a rental car as most as people's understanding is courtesy cars are generally free/included.