Who makes Subaru 02 sensors?

Subaru oxygen sensors are produced by several major suppliers rather than a single company, with Denso, NGK/NTK, and Bosch being the most commonly seen sources. The exact supplier varies by model and production year.

Why the supplier varies

Oxygen sensors are a critical part of a vehicle’s emissions and engine-management system. Automakers like Subaru source sensors from multiple global manufacturers to balance performance, cost, and regional supply considerations. The supplier is typically indicated on OEM parts or in Subaru’s official catalogs, which helps technicians source the correct replacement.

Common O2 sensor manufacturers seen in Subaru vehicles

Below are the main manufacturers that frequently appear in Subaru oxygen sensors. This list reflects typical factory and aftermarket sourcing across Subaru’s lineup and may vary by model and market.

• Denso: A leading Japanese supplier whose oxygen sensors are widely used across Subaru models, spanning several generations.


• NGK/NTK: NGK’s sensor division (often branded as NTK in OEM literature) is another common source for Subaru O2 sensors, valued for compatibility with Subaru engines.


• Bosch: A global supplier whose oxygen sensors appear in various Subaru models and as widely used aftermarket replacements.

Note: Subaru’s supply chain can include additional regional or tier-one partners depending on production year, market, and engine family. Aftermarket sensors from these manufacturers are also common, though exact fitment should be verified against your vehicle’s specifications.

How to identify the right sensor for your Subaru

To ensure you obtain the correct part, check your vehicle’s year, model, engine type, and the OEM part number listed in service manuals or Subaru’s official catalogs. When ordering, look for the supplier marking on the sensor (Denso, NTK, or Bosch) and cross-reference with Subaru’s listings or your dealer. If buying aftermarket, ensure the sensor is a direct-fit replacement with the proper connector and heater configuration for your engine management system.

Tips for verifying sensor compatibility

Inspect the sensor body for brand markings such as "DENSO," "NTK," or "Bosch." Compare the part number and engine code with Subaru’s parts database or your vehicle’s VIN-specific catalog. If in doubt, contact a Subaru dealership or qualified mechanic to confirm the correct sensor for your exact vehicle configuration.

Summary

Subaru oxygen sensors are sourced from multiple major manufacturers, principally Denso, NGK/NTK, and Bosch, with the exact supplier varying by model, year, and market. When replacing an O2 sensor, verify the specific OEM part number and supplier to ensure proper fit and emissions compliance. The aftermarket market also offers sensors from these brands, but correct fitment and electrical connector compatibility are essential for reliable operation.

Who makes the best aftermarket O2 sensors?

The best aftermarket O2 sensors are Denso and Bosch, which are frequently recommended for their reliability and quality, with NTK also considered a top-tier option. Other reputable brands to consider include Delphi and AC Delco. When purchasing, ensure you buy the correct part for your vehicle and avoid suspiciously cheap sensors, especially from less reputable sources, to prevent performance issues.
 
This video discusses the best O2 sensor brands: 54sCar CareYouTube · Mar 21, 2024
Top aftermarket brands

• Denso: Known for long lifespan and reliability. They use advanced sensing elements that can help improve fuel efficiency and decrease emissions. 
• Bosch: A German company with a strong reputation for quality and innovation in automotive sensors. 
• NTK: Another brand highly recommended by mechanics and enthusiasts for its quality and performance. 
• Delphi: A brand with a wide catalog of sensors to choose from. 
• AC Delco: Often recommended for GM vehicles, but also a solid choice for others. 

What to look for

• Vehicle fitment: Always verify that the sensor is compatible with your specific year, make, and model. Pay attention to details like connector type and wire length, and note that upstream and downstream sensors are different. 
• Quality and longevity: Sensors from reputable brands tend to use better materials, like advanced coatings, that resist contamination and last longer. 
• Avoid cheap options: Extremely low-cost sensors, especially from unverified sellers, can lead to performance issues or a shortened lifespan. 

Where to buy

• Reputable online auto parts retailers and their marketplaces, like Amazon, CarParts.com, and parts-specific sites like Parts Avatar, are good places to look. 
• Local auto parts stores can be a good option, and some suggest that brands they carry may have higher standards than some generic DIY parts stores. 
• For a guaranteed fit and quality, consider buying OEM (original equipment manufacturer) parts, but be prepared for a higher cost. 

You can watch this video to learn more about the testing process and performance of different O2 sensors: 57sTPV ProductionsYouTube · Oct 21, 2023

Who makes Subaru OEM parts?

Subaru OEM parts are made either by Subaru Corporation itself or by authorized suppliers that meet its strict manufacturing standards. This ensures that the parts are designed to be a perfect fit for your specific Subaru model and meet the same quality and safety requirements as the original equipment. 

• Directly by Subaru: The parts are manufactured either at Subaru's own factories or by divisions like Fuji Heavy Industries. 
• Authorized suppliers: Subaru contracts with specific companies to produce parts according to their exact specifications. 
• High standards: All genuine Subaru OEM parts must meet the company's strict standards for quality, performance, and safety. 

What brand TPMS sensors does Subaru use?

Schrader Electronics
The manufacturers of the Subaru TPMS are Schrader Electronics. The tables below show which models they are fitted to. Grey indicates either no TPMS, it was indirect TPMS, or the model was discontinued.

Who makes OEM Subaru oxygen sensors?

Denso or NTK. I would always choose NTK if available. Denso is original manufactures for Subaru ARF and O2 sensors.