Oxygen Sensor Upstream & Downstream 17014 SG1170 Compatible Vehicles

In this review the focus is on a pair of upstream and downstream oxygen sensors compatible with select Audi and Volkswagen models. The bottom line: this set is for DIYers and independent shops needing an OE-matched replacement that restores proper fuel mixture readings and can resolve rough idling, poor fuel economy, or a check engine light tied to oxygen sensor faults. The reviewer found the sensors to offer accurate readings and solid fit for the listed 1.8L engines when fitment is confirmed beforehand.

Key Features

• Vehicle Compatibility: Fits a defined range of Audi and Volkswagen models including A4, A4 Quattro, TT, A8 Quattro and multiple VW 1.8L models, which reduces the chance of ordering the wrong part when cross-checked.
• Replacement Part Numbers: Matches several OE numbers such as 17014 and SG1170 so it integrates with vehicles that reference those part numbers.
• Upstream and Downstream Coverage: Includes both sensors in one purchase so both pre- and post-catalyst monitoring can be addressed at once without separate orders.
• OE-Matched Performance: Engineered to meet original equipment specifications for fit and function, helping restore accurate air-fuel ratio readings.
• Durability Testing: Each sensor is tested to meet or exceed original standards for long-term accuracy, which helps maintain stable engine operation over time.

Who It's For

This sensor pair is best for car owners and mechanics working on early 2000s Audi A4, TT, A8 Quattro and Volkswagen Beetle, Jetta, Passat and Golf GTI models with 1.8L engines who need a direct upstream and downstream replacement. It is a practical option for drivers experiencing symptoms tied to faulty oxygen sensors and who can confirm fitment against the listed replacement numbers.

Those who should look elsewhere include owners of vehicles outside the specific model years or engine sizes listed, and buyers who require branded dealer parts with original packaging or extended manufacturer warranty coverage beyond standard replacement testing.

Pros & Cons

Pros

• Replaces both upstream and downstream sensors in one set, saving time and coordination.
• OE-matched design improves chances of correct fit and accurate readings after installation.
• Compatible with many common replacement numbers, making it easier to confirm fitment.

Cons

• Coverage is limited to the specific Audi and Volkswagen model years and engine sizes listed, so fitment must be checked carefully.

Specifications

Brand	Automost
Included Parts	Upstream and downstream oxygen sensors (2 pieces)
Compatible Engines	1.8L (selected Audi and VW models); A8 Quattro 4.2L listed
Applicable Models	Audi A4, A4 Quattro, TT, A8 Quattro; VW Beetle, Jetta, Passat, Golf GTI
Replacement Numbers	17014, SG1170, 234-5100, 234-5112, 2345115, 234-5126, 234-4753, 234-4808, 234-4859, 250-24263, 16109, 234-4869
Function	Monitors oxygen levels to optimize fuel efficiency and engine performance

Our Verdict

This pair of oxygen sensors is a sensible, cost-effective replacement for owners and workshops working on the listed Audi and Volkswagen 1.8L vehicles who need to restore proper fuel trim readings. When fitment is confirmed against the provided replacement numbers, the OE-matched performance and included upstream and downstream sensors make it good value for bringing engine performance back to expected operation.

Frequently Asked Questions

Will these sensors fit my car?
Check the exact model year and engine size against the listed compatibility and replacement part numbers before purchasing.

Do both sensors come in one package?
Yes, the product includes both upstream and downstream oxygen sensors in a single purchase.

What problems will replacing these sensors fix?
Replacing faulty oxygen sensors can address rough idling, poor fuel economy, and check engine light codes related to incorrect air-fuel ratio readings.