Bosch® 16978 - Premium Oxygen Sensor

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Product Details

Premium Oxygen Sensor (16978) by Bosch®. Position: Downstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch that is equally efficient in improving fuel efficiency and reducing harmful exhaust emissions.


Position: Downstream
Sensor Type: Heated
Connector Gender: Male
Terminal Type: Spade
Wires Quantity: 4 Wire Leads
Connector Shape: Male Spade
Installation Type: Threaded
Wire Harness Length: 69.3" (1760.2 mm)
Thread Diameter: 0.71" (18 mm)


  • OE Identical Connector
  • Compact Design
  • Improved Engine Performance
  • Increased Fuel Efficiency
  • Reduced Harmful Emissions


  • Oxygen Sensor
  • Mounting kit

An oxygen sensor detects the amount of oxygen in vehicle's exhaust gases and sends a signal to the engine computer. This signal is used by the engine ECU to fine-tune the air/fuel mixture to the optimal level to ensure maximum catalyst efficiency and a long service life. A worn-out oxygen sensor can cause serious problems like excessive fuel consumption and elevated exhaust emissions as well as shorten the life of a catalytic converter and affect engine performance. Bosch oxygen sensors are the number one choice for many car makers worldwide. Each oxygen sensor by Bosch is subjected to a 1,000 degree Celsius functional test and a leak test to ensure environmental and functional robustness. Bosch oxygen sensors feature a revolutionary Bosch patented universal connection system that is fully submersible in water and protects against contamination as well as withstands extreme temperatures and engine vibration.

Bosch®, a premier global supplier of services and technology, is a privately held company headquartered in Germany. Its operations have been divided into four main business sectors that include automotive technology, industrial technology, energy and building technology, and consumer goods. Bosch products and services are designed to fascinate and improve the quality of life by offering innovative and beneficial solutions. The company offers technology worldwide that is “Invented for Life.”

Part Number:


Bosch® warrants that its Products will be free from defects in material and workmanship for 12 Months/Unlimited Miles from the date of purchase by the Original Purchaser.

The warranty period commences the day the product is delivered to the original purchaser. This warranty, however, does not cover any labor costs incurred in diagnosis of defects, removal or reinstallation of a product, nor does it cover any other consequential expenses.

To obtain performance of this warranty, purchasers should contact the outlet where they originally purchased the product. A dated purchase receipt, repair order or other written proof that the product is within the warranty period will be required in order to honor the claim.

This warranty is limited to the original purchaser, i.e. is not transferable to subsequent owners of the product. Specifically excluded from this warranty are failures, caused by misuse, negligence, modification, abuse, improper application, or operation, or failures caused by unauthorized service or use of unauthorized parts. Also excluded from this warranty are parts, which are subject to normal wear and tear, e.g. light bulbs, fuses and blade inserts, etc.

To the extent permitted by law, this warranty is in lieu of all other express and implied warranties, including the implied warranties of merchantability and fitness for a particular purpose. Bosch does not assume any responsibility for incidental or consequential damages. Also to the extent permitted by law, this warranty sets out your exclusive remedies with respect to the products covered by it. No attempt to alter, modify, or amend this warranty shall be effective unless authorized in writing by an officer of Bosch.

Some states do not allow limitations on how long implied warranties last, or the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

Audi A4
2006 Audi A4
  • 1.8L
2005 Audi A4 / A4 Quattro
  • Convertible / Sedan / Wagon 1.8L AMB Engine
2004 Audi A4
  • Convertible / Sedan / Wagon 3.0L
  • Convertible / Wagon 1.8L
2004 Audi A4 Quattro
  • Convertible 3.0L
2004 Audi A4 / A4 Quattro
  • Sedan 1.8L AMB Engine
2003 Audi A4
  • Convertible 1.8L
  • Convertible / Sedan / Wagon 3.0L
2003 Audi A4 Quattro
  • Convertible
2003 Audi A4 / A4 Quattro
  • Sedan 1.8L AMB Engine
2002 Audi A4 / A4 Quattro
  • 1.8L / 3.0L
2001 Audi A4 Quattro
  • Wagon 1.8L
2001 Audi A4 / A4 Quattro
  • Sedan 1.8L
2000 Audi A4 / A4 Quattro
  • 1.8L C Engine VIN Character
Audi A6
2005 Audi Allroad Quattro
  • 2.7L / 4.2L
2004 Audi A6
  • 3.0L
2004 Audi Allroad Quattro
  • 2.7L / 4.2L
2004 Audi A6 Quattro
  • 2.7L / 3.0L Gas
2003 Audi A6 Quattro / Allroad Quattro
  • 2.7L
2003 Audi Allroad Quattro
  • 4.2L
2003 Audi A6 / A6 Quattro
  • 3.0L
2002 Audi A6 Quattro / Allroad Quattro
  • 2.7L
2002 Audi A6 / A6 Quattro
  • 3.0L
Audi A8
2006 Audi A8 Quattro
  • 4.2L Gas
2005 Audi A8 Quattro
  • 4.2L Gas
2004 Audi A8 Quattro
  • 4.2L
Audi S4
2009 Audi S4
  • 4.2L
2008 Audi S4
  • 4.2L
2007 Audi S4
2006 Audi S4
2005 Audi S4
2004 Audi S4
Audi TT
2006 Audi TT
  • 1.8L AWP Engine
2005 Audi TT
  • AWP Engine
2004 Audi TT
2003 Audi TT
2002 Audi TT
2001 Audi TT
  • ATC Engine
  • AWP Engine
2001 Audi TT Quattro
  • AMU Engine
  • Fits Models To Chassis # 8N-1-034-000.
2000 Audi TT Quattro
  • C / S Engine VIN Character
2000 Audi TT / TT Quattro
  • C / S Engine VIN Character
Volkswagen Beetle
2004 Volkswagen Beetle
  • AWP Engine / AWV Engine
2003 Volkswagen Beetle
  • AWP Engine / AWV Engine
2002 Volkswagen Beetle
  • 1.8L AWP Engine / AWV Engine
2001 Volkswagen Beetle
  • 2.0L AEG Engine
  • 1.8L AWV Engine
2000 Volkswagen Beetle
  • 2.0L AEG Engine
1999 Volkswagen Beetle
  • AEG Engine
1998 Volkswagen Beetle
  • 2.0L
Volkswagen Cabrio
2002 Volkswagen Cabrio
2001 Volkswagen Cabrio
2000 Volkswagen Cabrio
Volkswagen Eurovan
2003 Volkswagen Eurovan
  • 2.8L
2002 Volkswagen Eurovan
  • 2.8L
2001 Volkswagen Eurovan
  • 2.8L
Volkswagen Golf
2002 Volkswagen Golf
  • 2.8L
2001 Volkswagen Golf
  • 2.8L
  • 1.8L AWW Engine
  • 2.0L AEG Engine
  • 1.8L AWD Engine
2000 Volkswagen Golf
  • 1.8L
  • 2.8L
  • 2.0L AEG Engine
1999 Volkswagen Golf
  • 2.0L AEG Engine
Volkswagen Golf GTI
2006 Volkswagen Golf GTI 1.8T
2005 Volkswagen Golf GTI 1.8T
  • AWP Engine
2004 Volkswagen Golf GTI 1.8T
  • AWP Engine
2003 Volkswagen Golf GTI 1.8T / Golf GTI 20th Anniversary
  • AWP Engine
2002 Volkswagen Golf GTI 1.8T / Golf GTI 337
  • AWP Engine
1999 Volkswagen Golf GTI / Golf GTI GLX
  • 2.8L
Volkswagen Jetta
2005 Volkswagen Jetta
  • 1.8L AWP Engine
2004 Volkswagen Jetta
  • AVH Engine / AZG Engine / BEV Engine
  • AWP Engine
2003 Volkswagen Jetta
  • AWP Engine
2002 Volkswagen Jetta
  • AFP Engine / AWP Engine
2001 Volkswagen Jetta
  • AFP Engine / AWW Engine
  • AEG Engine / AWD Engine
2000 Volkswagen Jetta
  • 2.8L
  • AEG Engine / AWD Engine
1999 Volkswagen Jetta
  • 2.0L AEG Engine
  • 2.8L AFP Engine
Volkswagen Passat
2005 Volkswagen Passat
  • 1.8L
2004 Volkswagen Passat
  • 1.8L
2003 Volkswagen Passat
  • 1.8L
2002 Volkswagen Passat
  • 1.8L AWM Engine
2001 Volkswagen Passat
  • 1.8L AUG Engine / AWM Engine
2000 Volkswagen Passat
  • 1.8L ATW Engine
  • 1.8L ATW Engine / AUG Engine
Volkswagen Phaeton
2006 Volkswagen Phaeton
  • 4.2L
2005 Volkswagen Phaeton
  • 4.2L
2004 Volkswagen Phaeton
  • 4.2L
Volkswagen Touareg
2007 Volkswagen Touareg
  • 4.2L AXQ Engine
2006 Volkswagen Touareg
  • 4.2L AXQ Engine
2005 Volkswagen Touareg
  • 4.2L
2004 Volkswagen Touareg
  • 4.2L



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Bosch® - Premium Oxygen Sensor
Bosch® 16978 - Premium Oxygen Sensor
Average Rating: 4.9 of 5
4.8 of 5
Upstream Sensor 2000 Jetta 2.0l
Bosch® 16978 - Premium Oxygen Sensor
Bosch, made in Germany, as good as it gets.It fit as it should, had the correct diagnostic readings. easy to change. The cable was about 2 feet to long but easily folded up and tucked out of the way. All was good.
Posted by (Point Roberts, WA) / 2000 Volkswagen Jetta
Was this review helpful for you? Yes
5 of 5
Bosch® 16978 - Premium Oxygen Sensor
Posted by (Hollister, CA) / 2005 Volkswagen Golf GTI
Was this review helpful for you? Yes
Low Prices Price match guarantee
Guaranteed Fitment Always the correct part
In-House Experts We know our products
Easy Returns Quick & Hassle Free

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