The checking engine light illuminated and the engine began to hesitate. The mechanic found service code stored for fuel trim. The mechanic replaced a defective mass air flow sensor. The signal light bulb was replaced, because it blinked very fast.

- Mount Kisco, NY, USA

O2 sensor & mass air flow sensors were replaced as part of a compaign after they went bad. Less than 2 years later, O2 sensor has gone bad again. VW refuses to replace saying it's out of warranty. Complained that sensors were replaced at the very start of the compaign long before letters were ever sent out and that I could have received the old sensor. VW was unable to provide any proof that the replacement sensors were the updated sensors and they refused to cover the additional repair. New sensor lasted less than 2 years/40000miles.

- Smyrna, GA, USA

Check engine light repeatedly comes on due to malfunction of O2, mass air flow sensors.

- Fairfax, VA, USA

I have a 1999 Jetta. The oxygen sensor was replaced and based on the Volkswagen customer team, my car (based on the VIN #) does not fall in the ones that they recalled with the safety alerts issued by the epa and the Volkswagen company. I believed that they most re-considered the way that they selected the affected vehicles. Since I know people who has been dealing with the same oxygen sensor problem, and their vehicle identification number does not fall in the ones that the company has identified for the recalled.

- Aurora, IL, USA

Several oxygen sensors failed within weeks of one another.

- Parsippany, NJ, USA

Both the mass air flow sensor and the oxygen sensor have failed in my car after the initial warantee expired. Symptoms of each failure was a hesitation when accelerating similiar to stalling the engine, being possibly hazardous when turning into traffic.talking to the dealership, they stated that it was a "common problem" for both items. If this is a common problem this leads me to believe that these two components are defect in design. I've talked to other Volkswagen owners, service representatives and some independent repair shops and they have said that they have had/seen the same problems repeatedly. Repairs to this vehicle have become expensive at $750+ for each occurance. If you could provide any information I might be able to use I would be grateful.

- Mclean, VA, USA

Rear brakes were sqeualing for months. Took into dealership 5 times and they could not duplicate noise. Finally rear brakes went all together and had them replaced at another dealership. Dealer said they should not have gone after just over 30,000 miles so Volkswagen covered half of costs. One week later picked up car as I was driving home malfunction indication light came on. Took into dealership again. All three oxygen sensors had blown. Day after picking up from dealership passenger window fell into door and is currently back in being fixed. I know these are all common problems with 1999 Jetta. VW was somewhat helpful on cost but will do nothing now because they "have already been too kind". this car is dangerous and I do not feel comfortable driving it anymore. Now I have to cover the cost of an early lease termination for fear of injury or more $ for damage repairs.

- Bay Village, OH, USA

This is the fourth failure of the oxygen sensor since I purchased the car (new) in 1999. The dealer had worked with VW on the last failure to try to find a solution for the problem; however, less than six months later the sensor has failed again. Clearly, there is a problem with the model since the dealer has advised that many others have experienced similar failure. The last time it failed, there was about a one month delay in having the sensor replaced because they were on back order.

- Green Bay, WI, USA

March 16, 2000 malfunction indicator light on- needed a new oxygen sensor. Had to wait until October of 2000 (7 months) to get sensor replaced after numerous calls to Volkswagen customer service. Then in February of 2001 (4 months later) the malfunction indicator light is back on. Had diagnosed through a local mechanic it was oxygen sensor again and have same symptoms as before. Also major consumption of fuel after the indicator light came on. Several problems have occured in the car and Volkswagen will not even consider covering to get fixed. I have an extended warranty which also will not help cost of fixing the numerous problems with this new vehicle. Have tried to speak with several managers through Volkswagen and no one seems to want to help. The problems occuring will cause safety issues if they are not fixed soon. I am a single female, age 24, am living on my own and am very concerned about my transportation and the fact that no one from Volkswagen or the extended warranty (easy care) want to assist the problems. I would greatly appreciate your help with this matter. Thank you for your time.

- Findlay, OH, USA

Map failure. But also "coolant migration problem." Wherein, due to faulty coolant reservoir sensor seal, coolant migrated out of coolant reservoir and into wiring harness causing speedo and cruise control failures. Was repaired at no cost, as was maf. However numerous tdi and gasser owners are constantly reporting maf failures.

- Bisbee, AZ, USA

3 oxygen sensors blew up at different times less thn 1 month apart. Vehicle was unable to run move or start. When vehicle was started, it had a burning smell as though it was going to blow up. It was $500 for the 3 oxygen sensors to be replaced. Dealer stated oxygen sensors were sensitive.`

- Durham, NH, USA

Vehicle hesitates when taking off from stop and go. It launches forward like a delay with mass air flow sensor, but vehicle it still hesitates. Dealer says they can't replicate problem. The vehicle's hesitation became more frequent after each sevice and finally the engine shut off after the 34,000 miles service.

- Paloalto, CA, USA

O2 sensor(s) went bad immediately following warranty period.

- Philadelphia, PA, USA

Vehicle which is a 4 cylinder engine burned more oil than expected, a quart every 1000 mile. The oil level was down at 1000-1500 miles after oil change. About this time check the engine light came on. The dealer states that this problem is common with 2.0L. 4 cylinder engine, when the check engine came on againe, the dealer replaced the oxyen sensor. Since then no light came on.

- Marshfield, MA, USA