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Volkswagen Jetta Maintenance and Repair



  • eliaselias Posts: 1,830
    i'd start by getting the O2 sensor error(s) cleared, possibly by swapping in new O2 sensor(s) .
  • Well given that there are technicians out there who can take a totally smashed up Jetta and make it go straight again, I hope you can find a highly competent alignment shop that will go the extra mile for you and figure this out. With today's modern alignment equipment, I can't imagine a car that's not alignable unless it was severely damaged to the point where none of the adjustments can bring it back.

    Cupping is generally a suspension issue--this should be fixable. Maybe you need to go to a really good collision shop and get on a frame machine and see what the heck is going on here.
  • nitekim,

    I would start with the misfires. Misfires will cause the O2's to kick on. Been there, done that. Could be as simple as plugs. Could be the Control Mod. has a serious issue, but I think that's a long shot.

    Have the plugs ever been replaced? How about the wires, or ignition coil?

  • jeffyscottjeffyscott Posts: 3,855
    "I can't imagine a car that's not alignable unless it was severely damaged to the point where none of the adjustments can bring it back."

    Even then, whatever parts are damaged should have been replaced, so that it would be able to be properly aligned. Rebuilding the entire front end would have cost less than $3500 wouldn't it? I know my kid spent less than that on new front springs, struts, bearings, and axles on his '96 Jetta. (of course he also wore out two tires in about 6000 miles...evenly though, no cupping or anything)
  • Well I was thinking of a case where the unibody was tweaked so badly that it couldn't be know, like "crabbing".
  • jeffyscottjeffyscott Posts: 3,855
    Don't they have ways of straightening the "frame" though? (I've no idea what the cost of that would be)
  • Oh sure they can straighten anything, pretty much.
  • I already bought the parts I need, just have to get them put into my car. I have a 1998 VW Jetta GL and have to get my plenum gasket and valve cover gasket replaced. I don't want to get ripped off so how much should I expect to pay?
  • bpeeblesbpeebles Posts: 4,081
    You asked where to start... I have been troubleshooting and fixing electronics over 30 years and here is my initial diagnosis.

    1) Obviously these are not ALL happening at once (they are symptoms of the REAL problem so DO NOT start chasing all those codes)
    2) Validate you do not have the dreaded coolant migration issue which wicks antifreeze into the entire electrical system.
    3) Suspect a bad ground somewhere (becasue only a GROUND can affect so many things at the same time)
    4)Use VagCom to monitor/graph O2 sensors while you drive (there is one BEFORE and one AFTER the cat.)
  • Has anyone else encountered this? My 2003 Jetta will not start when it is colder than 25 degrees Farenheit. It will crank and crank but not start. It is so frustrating when I have to get to work. Took it to the mechanic, he replaced a hose and said it should be fine but it wasn't. I always keep the tank full of gas and put "Heat" in the gas tank as well. Please any mechanics or anyone who has experienced this!

    It is a gas engine, battery is only 2 years old. I looked up on Edmunds and it said something about the ETC sensor going bad on the Jettas but there was no further information. If I take it to my mechanic, even if it is not the same conditions (freezing) can he check the sensor? I am almost done paying this stupid car off and would LOVE to keep it until it dies basically. VW's are supposed to last forever!
  • I have a 2003 Jetta Wagon - the overall length of my wagon is 33mm longer than the sedan. I'm buying exhaust parts online but no one offers "wagon" as a choice for car model. Does anyone know if an exhaust system for a wagon is the same for a sedan given the overall car length is only 33mm difference. Wheel base is only 3mm difference! I would like to know before I buy the parts.
  • I hit a massive pot hole at about 20k miles. I had to replace the a wheel and have the alignment fixed. But that's when the problems started happening...
    As for the $3500....thats from god knows how many alignments, 3 sets of tires, and so called expert opinions from several so called experts. I'm so fed up with how the dealership tells me I'm off my rocker and how the car continues to eat up tires. I loved my Jetta ... but now I'd just love to get rid of it. I was curious if anyone had encounter this similar problem of cronically cupping tires and alignment.

    Thanks for the input though! Appreciate it
  • jogousajogousa Posts: 402
    I just changed oil and filter on my 09 Jetta Tdi Wagon.
    Tools needed: T-25 and T-30 torx (to remove 9 x T-25 and 3 x T-30 screws that hold the plastic undercoat). 32 mm or 1-1/4 box wrench to remove top oil filter housing (you will need an universal 1/2" joint, 5" extension 1/2" drive because it's a tight spot to get that pesky oil filter housing off). 19 mm box wrench to remove oil plug.
    Parts needed: Mann oil filter HU719/7X and 4 quarts of Castol Gold 507 00 synthetic oil.
    To reset the oil change interval display in your info.display (without going to the Dealer or without the need of the VAG COM re-setting instrument): Keys out of the ignition press and hold in trip odometer button 0.0 on your right. While still holding this button, insert key into ignition and put to the "on" position (without starting the car). Display will read "service now". Let go off "0.0" button and depress "m" or "min" button on the left side of the display. This will re-set the service reminder.

    Those handy enough can tackle this in less than 1/2 hour!

    Don't forget to recycle the used oil!

    Happy motoring!
  • good idea to use German oil filters in German cars, IMO. No off-brands, in house brands, please.
  • jogousajogousa Posts: 402
    Not sure what you are trying to say...
    To be technical about it, VW is "Mexican" car and Mann oil filter is actually manufactured in Czech Republic and is put in Skoda's cars - the factory in Mlada Boleslav, whose majority is owned by Germans. Castrol 507 00 (recommended by VW) is made in U.K. Germans don't have their own oil - not that I am aware of.
    In this day and age when car globalization is wide-spread it's hard to say what is "off brand". My VW Tdi, for example, is 35% German, 30% Mexican, 9% US/Canadian and the rest from elsewhere. It is assembled in Puebla, Mexico and the 35% of German items are mostly engine and a transmission.
  • It's built to the VW factory spec is what I meant, not a copy of a VW filter that is reverse-engineered, or skimped on to market at a lower price.

    Or, to put it another way, if the brand is sold at VW dealers, it's probably fine.
  • eliaselias Posts: 1,830
    you are most welcome, gcrv44a. in your situation i too would be tempted to trade the car.
    also i wonder if your insurance company paid beyond-deductible portion of the $3500 in repairs - seems like it should/would be covered under either collision or comprehensive insurance?
  • Anyone have any suggestions for an 02 jetta battery drain. Aftermarket radio installed over three years ago. have the original monsoon amp. Car dies after sitting for more than 2 or 4 days. Recharges and then dies again. Tried alternator and also fuses one by one. Something is still draining a ton of energy from that battery. Any ideas for a fix? Could it be the fuse behind the radio? Heard there is a fuse there but haven't pulled radio yet. Love the car have over 190,000 miles on it. But now this ??
  • I know your problem was YEARS ago, but I am having same issue with my car now. DId you ever find out what drains the battery?
  • jogousajogousa Posts: 402
    The only 2 things that I can think of is an alarm system or a bulb on in the trunk (had that problem with Saab - trunk light bulb was on and I did not see it because the trunk was closed). Some lights have 3 way switches, one of them keeps it on all the time. Not sure if Jetta sedan has one in the trunk - I happen to have a wagon.
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