NTK 25604 oxygen sensor for the 1999-2005 Volkswagen Jetta 4-cylinder 2.0L, the 2000-2001 Jetta 4-cylinder 1.8L and other vehicles senses oxygen in the exhaust and sends the ECU closed-loop feedback. This NTK oxygen sensor helps the ECU control the air-fuel ratio and lets the OBDII system flag fuel delivery or catalytic converter problems.
- Heated sensor with switching zirconia technology
- 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects the ceramic element from poisoning
- Dual-coated platinum interface and thinner ceramic element for quick light-off and response
- NTK sensors go through vibration and thermal shock testing in development, plus testing during manufacturing
Quick facts
- Part: NTK 25604 oxygen sensor
- Fits: the 1999-2005 Volkswagen Jetta 4-cylinder 2.0L, the 2000-2001 Jetta 4-cylinder 1.8L and other vehicles
- Position: Downstream
- Condition: New
A check engine light, rough running or poorer fuel economy can mean the sensor is worn, though a leaking exhaust joint or a damaged connector can be behind the same signs, so rule those out first.
Fits
It is listed for a wide range of Volkswagen and Audi models, including the 1999-2006 Volkswagen Golf 4-cylinder 2.0L, the 2000-2001 Golf 4-cylinder 1.8L, the 1998-2005 Volkswagen Beetle 4-cylinder 2.0L, the 1999-2001 Beetle 4-cylinder 1.8L, the 2005 Beetle 4-cylinder 1.8L and the 2006-2010 Beetle 5-cylinder 2.5L. If your car is not named here, look up its year and engine in the "Vehicles it fits" section. This listing is one downstream sensor, and the fitment calls for one.
Specifications
Fit and size
- Position: downstream
- Quantity per vehicle: 1
- Hex size: 7/8" (22mm)
- Thread size: M18 - 1.5
Build and materials
- Technology: switching zirconia type
- Heated: yes
- Condition: new
Installation notes
- Water-resistant connectors and harness accessory hardware, specified to OE, come with the sensor for easy installation.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is the NTK 25604 one of the VW Jetta oxygen sensors for the 2000-2001 Jetta 4-cylinder 1.8L?
Yes. The NTK 25604 oxygen sensor is listed for the 2000-2001 Volkswagen Jetta 4-cylinder 1.8L and also for the 1999-2005 Jetta 4-cylinder 2.0L.
Is this O2 sensor for the VW Jetta (1999-2005, 4-cylinder 2.0L) a downstream sensor?
Yes. The catalog lists the NTK 25604 in the downstream position, and the fitment calls for one sensor per vehicle.
Is this NTK O2 sensor heated?
Yes. The NTK 25604 is a heated oxygen sensor of the switching zirconia type.
What hex size and thread does this oxygen sensor have?
This oxygen sensor has a 7/8" (22mm) hex and an M18 - 1.5 thread.
Are the connectors on this oxygen sensor water-resistant?
Yes. The sensor is equipped with OE-specified, water-resistant connectors and harness accessory hardware.
