Service Engine light and Oxygen Sensors

[lhordmclain]

This is my humble 2 cents
(oem vs genuine parts your call)

- O2 Sensor
* Since one has failed, I plan to replace the other as well
- secondary air valve
* Try cleaning it 1st with carb cleaner or buy new one
* replace the gasket
* I will plan to do the hoses too, if it turns out to be brittle
- valve cover gasket
* Like you, I did the all the spark plugs at the same time.
* I added RR vanos high pressured oil line and gaskets
* refreshed CCV/Oil Separator (mine was an updated cold weather already but it been 9-10yrs) and included the updated guide tube+hose from Oil Separator to Guide Tube + Dip stick O-rings
* I did not do vanos o-rings and other parts by beisan, your call if you
are up to it -> Beisan Systems - Procedures - Double Vanos Procedure

- do visual check for other items like serpentine belts, ac belts, CCV/Oil Separator.....
- top off the fluids (collant, engine oil, power steering)


Hopefully, I can drive down there again this summer music festival and stone mountain for my little one (daughter).

GL...

Originally Posted by Riggodeaux

Update. I continued to get the Peake Table 19 F5, F6 codes [P0491,492 on Autozone's OBDII scanner] and added a table 19 3d code [post-cat O2 sensor] so I stopped by the dealer and had them do the official bmw computer scan. It tied the F5/F6 codes to the secondary air pump check valve and confirmed the one O2 sensor. The dealer's tech, always looking for billing opportunities, noted a leak around the valve cover gasket, too. The price quotes: $685 to replace one post-cat O2 sensor, $566 to replace the secondary air valve w/gasket, and $575 to replace the valve cover gasket. All easy DIY tasks, so I've ordered the parts [for these alone, less than $200, saving $1600+ over dealer rates] and will do the other O2 sensors and now-overdue sparkplugs while I'm under the hood. I don't notice symptoms, but I may do the preventative DISA valve repair [G.A.R. kit] while I'm at it. Any thoughts?

[Riggodeaux]

My CCV pipes, etc [and the valve cover gasket] were done just before I bought it, less than 30k miles ago, so I expect the CCV is fine. I have ordered the OEM manufacture [but not BMW labeled] air control valve [p/n 11727553067] w/gasket for less than $100, Bosch O2 sensors x4, and the BRKR6EQUP plugs. I'll check everything out, but didn't plan to do the Beisan double Vanos o-ring replacement unless I had symptoms - vehicle is running great, what are the Vanos failure symptoms again? I'll pull the DISA and inspect its flapper, just trying to decide whether to go ahead and order the G.A.R. repair kit. As I understand it, the DISA is accessible from outside the valve cover, so no pressing need to do it while the cover is off. Regardless, between the plugs, O2 sensors, air control valve, and inspections [I'll probably pull and clean the MAF sensor, too], sounds like a fairly active Saturday of playing grease monkey ....