@JCL, thanks for your sincere reply.

I'll give the local dealers a call tomorrow. Their website only shows special price for 2000-2006 x5. The price is really good though. $220 for sensor and pads. Maybe they might have some special deal for the 08. We'll see.

I was actually not considering DIY the brakes since I probably have to buy all the necessary tools. Instead, i was planning to ask a guy who was willing to do the job for $100 if I provide the parts. Apparently, he has much DIY experience.

By the way, do you know if the difference of 2 Ah and 50 CCA is big enough to require coding? I know duralast-H8AGM is highly recommended, but since it doesn't match my battery's spec exactly, I'm wondering if it requires "coding."