BMW e53 3.0L A/C Compressor/System Difference

[Auto Parts Guy]

Originally Posted by cn90

I don't see any problems with VD Ac Compressor.

- My 1998 528i Denso (it was a VD compressor from factory) lasted until 160K when it made noise, so I replaced it with another Denso ($220 for parts). Id di it myself and I am now at 180K, zero issues.

- My 2006 X5 3.0i with 135K, the Calsonic Kansei compressor is still fine. If and whenever I need to replace it, I'd stick with whatever came with the car, in this case, Calsonic Kansei brand name. However, browsing FCPEuro website, all I see are Nissens (which is probably OK) and BMW Genuine brand.

No problems until your VD compressor takes 5-10 min to start cooling. Otherwise it's just as great as a standard compressor.
Truth be told, I picked up this compressor and OEM line for a tad over $100. Other no name compressors for my year model were the same price, and i prefer OE brands where I can. The OE was something stupid like $300-$800.. No way man.

Originally Posted by cn90

- What is the odometer reading in your X5?
- What are the symptoms?

BTW, I wrote a DIY for my 1998 528i AC Compressor below:

https://www.bimmerfest.com/forums/sh...d.php?t=924320

Nice DIY. Pretty sure the 98 e39 compressor is not a VD.
I am no mechanic but have all necessary tools to do everything including vacuum pump and gauges.

The X5 has just under 180k miles.
Symptoms are the typical e53 VD compressor symptoms. Works great when it works. Takes ~5min+ for the compressor to start working. If you rev the engine to 3-5k rpms, it typically starts working normally. Once it starts working, it works properly the whole trip. Pressures are normal, aux fan works, no codes or other symptims. No marbles in a can noises or any other noises. When you unplug the pressure switch, the fan kicks on high.

I first learned about a VD conpressor when i had my gauges on my 06 X5, AC on, clutch engaged, but no change in pressures, either from suction or pressure side. And i could see the clutch engaged. Aux fan also not running. But I could command the fan on via INPA, and fan worked with the pressure switch unplugged. And i knew my AC worked. This is what made me go to my trusty Google friend and learn about variable displacement compressors.