X5's Right Front Air Suspension Sagging, BMW Asks $1700 to Fix

[minz-x5]

I've had some annoying issues with my X5 over the 9 months, but nothing as costly as this: a quote for $2,200 and I wanted your opinion, especially if you've dealt with air suspension issues (my 4.4i Sport has air bags on all four corners).

Basically, when I park the car, there's about a whole hand distance between the tires and the wheel arches on all four corners. Come back after an hour, and you can barely fit a finger (no pun intended) on the right front side (passenger) and maybe two on the left front side (driver), with the car obviously leaning forward and right. Strangely, there's no fault light on the dash.

I took it to BMW here in Boston and after not finding anything wrong, I asked them to check it again and magically, they discovered two issues:

1) replace shock and perform ride height adjustment (right front air shock bag leaking) cost $1,688 (I hope that includes labor…)

2) Replace both front thrust rod bushings (Found both front thrust arm bushing cracked, leaking, and/or knocking.) at $421

Do you guys have any idea whether the price is fair? I want to ask a second BMW dealer as well as an indie, but I need a rough estimate. Thanks!