NO

Good news, it's a 110 dollar repair at most

not bad, im new to BMW. ill have to look into it further.
thanks for the reply

Hi.X5's engine comes with chain or belt.I think it is with chain but not quite sure about it.Thanks.

Which engine? Can you be more specific about the information you're looking for? The engines use belts & chains...but it depends on what area of the engine you're referring too.

The alternator/waterpump/AC compressor uses belts...the valve train uses a chain...at least it does on the N62 & M62TU.

If you're asking about the "timing" belt or chain (for the valve train)...BMW hasn't used a belt since the old M20 engine last used in the early 1990's 3 series (like 1993 was the last model year of the M20 320i/325i)

http://bimmerboard.com/members/q/ori...0Line%20Up.jpg

Yes,I was asking about the timing belt.So, it is as I thought,thanks.

I imagine the question about belts and chains is really a question of whether you have to replace the timing belt periodically. Sadly, the chains aren't so bulletproof. They run along plastic surfaced guides that wear and fail, allowing the chain to slap which then accelerates wear and chain damage. Luckily, it usually gets noisy a little before it breaks (most people don't hear anything before a timing belt breaks). The chains and guides are not lifetime parts...

But chains last way longer than belts.

my passenger side air bag light is always off but when someone sits in the seat it turns on and says "pass side air bag off" and my air bag light on the dash comes on

Sounds like you are having a well known problem with the occupancy sensor mat buried in the passenger seat. Some years have a recall on it. There are DIY posted on how to change it also.