Double check my analysis - Faulty fuel rail low pressure sensor

My poor '09 E92 M3 triggered an "Increased Emissions" warning about a month ago. Since then, it has had some pretty rough starts when parked outside. Since I had the same warning about a year ago, I thought it was another bad O2 sensor and didn't do much about it. Today, I finally got around to pulling the ODB2 codes:

• P0172 - Fuel System Too Rich (Bank 1)
  
• P0175 - Fuel System Too Rich (Bank 2)
  
• P0191 - Fuel Rail Pressure Sensor Circuit Range/Performance
  
• P0192 - Fuel Rail Pressure Sensor Circuit Low Input
  
• P0301 - Misfire Cylinder 1
  
• P0302 - Misfire Cylinder 2
  
• P0303 - Misfire Cylinder 3
  
• P0304 - Misfire Cylinder 4
  
• P0305 - Misfire Cylinder 5
  
• P0306 - Misfire Cylinder 6
  
• P0307 - Misfire Cylinder 7
  
• P0308 - Misfire Cylinder 8

Some quick googling reviews this is likely the Low Fuel Rail Pressure Sensor. Therefore, my plan is to replace it with part 13-53-7-614-317. Since I am going to the dealer on Saturday for an oil change, I figure I would pick it up then.

1. Does this seem like the proper diagnosis?
2. My car repair experience consists of replacing 1 O2 sensor, and this was on the edge of my ability. How hard is it to replace this sensor? It appears it twists right out, but that I might have to remove the airbox. DIY'able?

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

M3an V8 wrote

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

Would you mind linking to the DIY? The one I found is detailed, but replaces a different sensor than I thought.

DBordello wrote  

M3an V8 wrote

I replaced my low pressure fuel sensor a few months ago, super easy. There is a DIY about it, make sure you use a 9/16 open end wrench to stabilized the rail as you unscrew the sensor. If you replaced an O2 sensor then you have plenty of skills to tackle this.

Not sure about the missfire codes though, didnt get any when my sensor went out.

Would you mind linking to the DIY? The one I found is detailed, but replaces a different sensor than I thought.

I used this DIY

http://www.m3post.com/forums/showthread.php?t=694148

Hey guys,

Need suggestions. Mine failed and got P0192 and misfires at cyls 1-7. Replaced the sensor with the newer version (silver).

The car is cranking but will not start.

Battery is fully charged.
Gas is a little over a quarter.
Fuel pump primes.
Fuel pump fuse is good.

Any other thing I can check?

Thanks.