★★★★★
April 6, 2026
Perfect
Excellent quality
Replaces
Part Details
About TRQ:
TRQ is a trusted brand dedicated to making every repair a success story by combining premium parts with easy installation. Each TRQ part is engineered by a team of automotive experts to meet or exceed OEM standards, delivering enhanced performance and maximum longevity. With rigorous in-house testing, the brand ensures superior fit and function across every product line. TRQ also provides customers with best-in-class, step-by-step installation videos—so you can complete repairs with confidence, whether you're a first-time DIYer or an industry professional.
Product Features
TRQ oxygen sensors are manufactured to precise specifications using premium raw materials to optimize your vehicle’s emission system. Each sensor is isostatically-pressed for improved strength and durability, and plasma-sprayed to improve sensitivity and prolong the service life of the sensors. Oxygen sensors wear out over time and should be replaced every 60,000 miles to prevent poor engine performance. TRQ recommends replacing the oxygen sensors in sets to optimize fuel economy and reduce overall emissions. All products are fit and road-tested in our Massachusetts R&D facility to ensure we deliver on our promise of Trusted Reliable Quality.
What is Upstream vs. Downstream?
Install Tip: You may be required to reset the vehicle computer after installation of this part.
Returns: Parts with electrical components cannot be returned once installed.
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
This part fits 5 vehicles spanning 2014-2020.
| Year | Make | Model | Description |
|---|---|---|---|
| 2019-2020 | Subaru | Ascent | Subaru Ascent H4 2.4L Downstream Bank 1 Sensor 2 O2 Oxygen Sensor TRQ OSA60393 |
| 2014-2018 | Subaru | Forester | Subaru Forester H4 2.0L Downstream Bank 1 Sensor 2 O2 Oxygen Sensor TRQ OSA60393 |
| 2020 | Subaru | Legacy | Subaru Legacy H4 2.4L Downstream Bank 1 Sensor 2 O2 Oxygen Sensor TRQ OSA60393 |
| 2020 | Subaru | Outback | Subaru Outback H4 2.4L Downstream Bank 1 Sensor 2 O2 Oxygen Sensor TRQ OSA60393 |
| 2015-2020 | Subaru | WRX | Subaru WRX H4 2.0L Downstream Bank 1 Sensor 2 O2 Oxygen Sensor TRQ OSA60393 |
| Brand Label | Part Number |
|---|---|
| Walker Products | 250-241160 |
| DENSO | 234-4988 |
This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
OSA60393
Excellent quality
Amazing fast shipping, great quality for a great price. Took me 15 mins to swap out the old and in with the new. Thank you!
Best price and fast shipping
works like intended!
Actual Measurements are not listed or available. Our parts are exact replacements for your vehicle's OEM parts. As long as your year, make, and model match up with our listing, these parts will directly fit and function like the originals.
