Q: Which Item should be priority assuming I can't afford all at the same time? on 2002 Volkswagen Passat

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
2002 Passat GLS 1.8T Sedan - $61k miles
Reason for Check Engine Light (#1, 2, 3)
#1 Diagnostic Procedure 5052 - Bank 1, Sensor #2 internal resistance too high
- Replace O2 Sensor #2 =$199 parts + $200 labor = $400 plus tax
#2 System too lean - all vacuum hoses are broke $24 parts + $200 Labor = $224 + Tax
#3 Also Misfire in cylinder #3 and #4 - spark plugs are wasted $18x4= $72 parts + $100 Labor = $172 + Tax

#4 Coolant bottle is completely dirty, needs a new bottle and a flush - $290
#5 40k Tune Up = $750 (which is odd because I'm at $61k)
(3) Answers
(1) Comments
I would do the miss fires first because if you dont you may kill the cat which would add about 1000 to your repairs.

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Ouch. I would go 3,1,2.. but you may not have that option. To get this car running right, you may be forced to do all of the first 3. 4 and 5 can wait a little longer - but if you are already 20k over your 40k recommended tune-up, you dont want to push that one. That is possibly the reason you are having the issues with 1,2, and 3.
good luck!
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Dear Rookie If your vehicle information posted is correct the issues you have listed are of concern but your main concern should be the fact that your timing belt is 10 years old and if it breaks the results are catastrophic!!The rule in the real world of interference engines such as the one in your Passat is to never go more than 5 years or 60k miles. Granted the problems you have listed are real and should be repaired. If you are original owner of this vehicle,VW should have sent you a notice of Ign coil replacement under a recall bulletin.When having this recall done the dealer would be able to install your spark plugs for a nominal fee because they are servicing your secondary ignition problems.Again the timing belt issue is the greatest concern you should have.Also if coolant reservoir is not cracked just clean it. A proper t-belt service includes w/pump replacement with new coolant.
Thanks all for the replies...I am original owner and only the Dealer has worked on the car.
According to my paperwork which I just dug through...I did the 30k Maintenance - Twice in '06 (not sure why), I did the 45k in Nov '09 along with the Ignition Coil. And I did the 50k in May '11. And the Timing Belt was just replaced in Sept. '11. Looks like the Vacuum hose and pump were all replaced in May '07. ANd I found one comment on workorders that stated "Spark Plugs Fouled" back in May '06, but no paperwork trail to state they were ever further addressed or replaced.
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