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Audi S4 Questions

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40,000 miles and we need to change ATF FOR AUDI S4 2005
My 2nd advanced key is not working on my 2014 Audi S4. Changed the battery several times. Press button and its flashes red. Im not sure what else to do.
the Abs and tie pressure light is on, and the AC and radio shut it off too.
Needs timing work
Tried replacing the shift lever but to no avail.
29K on my Audi. When doing the front brakes do I need to change the rotors as I still have 20% left on the pads.
This is a convertible, now interior repairs done so do not know how it came loose. Or is the radio just malfunctioning?
Palo Alto dealer said that they replaced the igniter and rechecked but the code persisted and the light was still on. They checked the spiral cable too and ended up ordering a new airbag (2 wks). Also repaired seatbelt. I am amazed that an Audi airbag stops functioning after 5 years. Can I take action? Do I need lawyer?
My 2004 Audi S4 4.2L CEL came on this weekend the codes are p0174 and p0175 system to rich bank 1 and 2. Check air filter and it looks clean, could this be a Mass airflow sensor? What should be my plan of attach or simply just take it into the shop?

Cheers,
Looking at buying a 2008 S4 with 90k miles on it and I have been reading that many of the S4's have an issue with the timing chain tensioners. I wanted advice on whether to go ahead with this purchase or not.
Repair costs
Lane B - Item # 2049 on AutoBidMaster
VIN:WAUBGAFL2EA048383



I have carfax report too!
My temp sensor problem started when the connector broke from being brittle lcan you please verify the pin wire location. I haved pin 1=brown&yellow pin2=brown&white pin3red&grey pin4=brown&blue. I have 2 volts in on pin 1 2 volts out on pin 4 so i'm guessing pin 1&2 from ECM & pin 2&4`````to gauge? the connector was mis wired first would that fry the gauge or ECM?
IS THERE A COMMON RELAY CONNECTING THE SENSORS RE: COOLANT SENSOR FAN SENSOR ECT? i HAVE 5 VOLTS TO THE SENSOR IT DOESN'T WORK `NO BLOWN FUSES GETTING MISOUL. CODES FOR BANK 1 O/2 THEN BANK 2 i HAVE RERWIRED ALL? THE TEMP GAUGE JUST WONT RESPOND
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