Because of issues with the glow plugs and/or the glow plug wiring harness from the control relay, the Check Engine Light may illuminate. Our technicians tell us there is a service bulletin, not a recall from Volkswagen regarding replacement of the glow plugs on 2004-2005 model years only.
Resources for the Repair and Maintenance of your 2003 Volkswagen Jetta TDI
2003 Volkswagen Jetta TDI
2003 Volkswagen Jetta TDI Problems
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.
One or more power windows may fail. Our technicians tell us this is commonly due to a failed window regulator which will require replacement.
Oil and carbon tend to build up, creating restrictions in the intake manifold. Symptoms will be loss of power (sometimes severe) and poor fuel economy.
Reverse gear failures and noise in the manual transmission models are common.
2003 Volkswagen Jetta TDI Questions and Answers
When replacing glow plugs, is that all that needs to be done?
What is the glow relay?
I check engine light is on it states that is it Glow Plug Relay # 3. What is the cost of replacing this and what harm could this do to the engine
Both brake and taillights have been replaced by me and they still do not work. Specific lights needed? Fuse problem?
Bungled the job?
DIAGNOSTIC CODES PO732A & PO 733
Same as above
2003 Volkswagen Jetta TDI Reviews
Bought a 2003 VW TDI (Diesel) brand new. Today, the car has 170,000 miles. All went well until it reached about 100,000 miles (which is just breaking in for a diesel). What happened next between 110,000 and today:
- Relays under dash start blowing (they ain't cheap either). they are also VERY difficult to get to. Should be a recall!!!
- Wiper motor will start stopping intermittently; don't replace the motor as most mechanics will tell you because it still does the same thing no matter what all you replace...relay, motor etc. Should be a recall!!!
- Glow plugs will send a false engine light every few months. Your glow plugs are fine; it is a money gimmick. Bypass the engine fault (there are several videos on how to do this one the I-net). Should be a Recall !!!!
- VERY DANGEROUS- Brake switch is JUNK! which will cause your brake lights to stay on going down the road. The switch is made of plastic and wears out in the "brake on" position. Should be a recall!!! Easy and rather cheap fix IF you know about it before someone rear ends you and kills your family!!!!
All in all, the body and engine are sound. The electrical SUCKS!!!! And for those of you who don't know electrical, it is the most expensive to repair.