Last post on Nov 10, 2013 at 1:53 PM
You are in the Volkswagen Jetta
What is this discussion about?
Volkswagen Jetta, Sedan
#5921 of 6655 Re: Jetta brake feel [Mr_Shiftright]
Jan 03, 2009 (3:05 pm)
Thanks, that's good info. I'll check the clearance the next time I go out.
Here is the recall info, from edmunds.com ("Maintenance, Recalls and TSBs" page for the 2005 Jetta GL):
Nature of Defect:
3. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Recall Number: 07E023000
Dates Manufactured: N/A to N/A
Number of Vehicles Affected: 13128
Date Owners Notified On: N/A
Vehicle: 2005 Volkswagen Jetta
CERTAIN CARDONE MASTER CYLINDERS WITH DATE CODES LOWER THAN DCA7078 SOLD AS REPLACEMENT EQUIPMENT FOR USE ON THE VEHICLES LISTED ABOVE. THE SEAL ON MASTER CYLINDER CAN FAIL AND LEAK BRAKE FLUID.
Consequence of Defect:
LOSS OF BRAKE FLUID CAN RESULT IN POOR BRAKING PERFORMANCE, POSSIBLY RESULTING IN A VEHICLE CRASH.
CARDONE WILL NOTIFY OWNERS AND OFFER TO REPURCHASE ANY DEFECTIVE MASTER CYLINDERS. THE RECALL IS EXPECTED TO BEGIN DURING APRIL 2007. OWNERS CAN CONTACT CARDONE AT 1-800-777-4780.
#5922 of 6655 Re: Jetta brake feel [backy]
by MrShift@Edmunds HOST
Jan 03, 2009 (5:32 pm)
Okay well this might not appear then in VW service records at the dealer? This appears to be a supplier's issue, not a VW issue. You'd best call Cardone and find out what #s are affected!
#5923 of 6655 Re: Jetta brake feel [Mr_Shiftright]
Jan 03, 2009 (5:41 pm)
I'm going to let the dealer handle it on Monday. They should have records of recall work on the car. Also I am going to ask to see the VW Certified inspection report, see what it said about the brakes.
#5924 of 6655 Re: Jetta brake feel [backy]
Jan 04, 2009 (7:17 pm)
To specifically answer your questions...
Those of you who know these cars, what is the "normal" brake feel?
VW brakes have always been firm and almost "touchy". Anything more than the pressue of my big toe would make the passengers lunge forward against their seatbelts. (I do know a guy with a Porsche that has better brakes than my Jetta - LOL)
Is it typically "mushy", or should I be concerned and take it back to the dealer?
I would be concerned! The first thing to do is the have the brake-fluid replaced and the hydrolic system fully bled. Bleed the ABS pump and clutch too! (The clutch fluid is 'shared' with the brake master-cylinder) Use only DOT4 fluid in VW systems.
Are you aware that on ALL vehicles, brake fluid should be replaced every 2-3 years reguardless of miles? Your car is due for its SECOND brake-fluid change in 2009.
Just so you are aware of my experinece with VW brakes... I have been servicing the brakes on all of my personal vehicles for many-many years. (Because I do not trust most so-called mechanics.) I have owned VWs since my 1979 Scirocco. I replaced the brakes on 3 VWs this summer. (including using laptop computer to bleed the ABS pump and valving.)
#5925 of 6655 Constant Problems...
Jan 04, 2009 (7:40 pm)
Owner of a 2000 Jetta GLS 2.0/4 CYL manual TRAN.
The check engine light has been on since a week after I bought it used. Many different codes, VW says its the computer. Don't have $1,000 to drop into it.
Last December it began to sputter and go through an ENTIRE tank of gas in 100 miles. or about 8 miles/GAL. Multiple misfires whenever I drove it. Replaced the 1 and 2 forward O2 Sensors and that cleared up the problem.
Now again, 1 year later the problem is back. It may very well be the O2 sensors and if it is, that is fine I accept that. But my question is, what it causing this? Why are the O2 sensors going bad after 10,000 miles? I run 87 octane in it and from what I've read that is fine, but willing to switch if it will help the vehicle.
I am receiving a P1128 code which points toward the mass air flow sensor, but that was replaced to no avail. Check engine light was still on. Thats when VW told me it was the computer.
I appreciate any help or ideas. Thanks!
#5926 of 6655 Re: Jetta brake feel [bpeebles]
Jan 04, 2009 (7:43 pm)
Thanks! I will take this info with me when I go to the dealer tomorrow. I will request (the polite way to say it) that they verify that the brake system and hydraulic system have been bled recently, or do it now. The car is an automatic so no clutch to bleed.
#5927 of 6655 Re: Constant Problems... [smitteyb11]
Jan 05, 2009 (7:49 am)
Where did you buy the MAF sensor from?
Does it have a warranty?
If so get it replaced again.
If the code says MAF sensor then that is probably your problem.
This can cause bad MPG.
Misfiring of the engine.
As the fuel air ratio is not correct and the computer tries to compensate for bad information from the MAF sensor.
Check the wiring connections.
CRC makes a MAF sensor cleaner.
Buy at an auto parts store.
My Autozone has them.
Spray that into the MAF sensor with the sensor off of the car.
Reinstall the MAF sensor.
Then run the car.
See if that clears up the issue first.
If it does then make sure your air filter is still good.
If cleaning does not help then buy an after market MAF sensor that has a warranty and if it goes bad again use the warranty.
Usually at Autozone it is a one year warranty.
This of course if for re-manufactured ones.
#5928 of 6655 Re: Constant Problems... [revmarket]
Jan 05, 2009 (4:28 pm)
Do not use start replacing things because a "code" says there is a problem. There is NEVER a "code" that says "replace the MAF" The "codes" are simply factoids that need to be understood in the larger scheme of things.
Only boneheaded mechanics who want to make $$ selling you parts will try to tell you that a "code" told them that a part was bad. Perhaps they do not want or know how to UNDERSTAND what the "code" is telling them.
*)If a code says that the "MAF sensed too little airflow"... then you should check for air leaks. NOT replace the MAF.
*)If O2 sensors are telling you there is too much oxygen in the exhaust... then suspect plugged injectors or low fuelPressure.
To more specifically answer your question about O2 sensors going bad prematurly....An O2 sensor should last over 100,000 miles. Its life is shortend if your engine is buring oil or blowing antifreeze out the exhaust. That will contaminate the O2 sensors.
Lets use some LOGIC against your specific problem:
"P1128 Long Term Fuel Trim mult.,Bank1 System too Lean" This is NOT necessarrly related to the MAF because MAF does not measure 'leanness'.... the O2 sensors measure 'leanness'
Instead, This means that the O2 sensor is telling the computer that there is not enough fuel being sensed in the exhaust based on how much air the MAF is measuring. So, to compensate, the computer is injecting more and more fuel in an effort to satisfy the O2 sensor. The problem is that the O2 sensor is telling the computer the WRONG INFORMATION. Thus, you are burning way too much fuel.
I am surprised that your CEL is not *flashing* because running this rich can burn out your catalytic converter. Speaking of catalytic converter.... I am thinking that yours may already be burned up.
You should also check/replace all vacuum lines. A vacuum leak can cause this kind of problem and the vacuum lines are cheap and easy to repalce. Any air leaking into the system AFTER the MAF is not measured by the MAF... (but is getting into the engine)
One simple way to check for bad MAF is to disconnect the electrical connector from it and then start engine and drive for a few days. (This WILL lite the CEL) Check if the engine runs better without MAF connected.
Above, I have given you a start in how how to diagnose your problem... I will let you continue from here...
#5929 of 6655 Re: Jetta brake feel [bpeebles]
Jan 05, 2009 (4:47 pm)
Update on brake problem: took it into the dealer today. Service manager drove it, admitted the brakes did seem soft. He also said the brake system had been flushed before the car was offered for sale and the brakes have to have at least 50% left to be VW Certified. He thought maybe some air had gotten into the brake system during the flush. They kept the car for the day (gave me a loaner, including gas) and bled the brake system including ABS, and road tested it. The brakes do feel a little firmer now, and there is more clearance under the pedal when pressed hard. But they are still not anything close to a "firm" feel as I would think of firm. I'll keep an eye on it; if it is a leaking hydraulic system or bad master cylinder, that would be covered under the Certified warranty... assuming I'm not killed due to brake failure.
#5930 of 6655 Re: Jetta brake feel [backy]
by MrShift@Edmunds HOST
Jan 05, 2009 (6:43 pm)
If you can't get satisfaction next time you bring it around, try this:
Write the dealership a letter and use words like "dangerous", "ineffective braking", "concern for my family's safety" and watch 'em jump. Be courteous and professional but let them know you want to be on record about this brake defect, "just for the record".