Hi, This set fits the 2008 Cadillac SRX Base 6 Cyl 3.6L and is for the downstream (after). You can buy this set, and 2 of the upstream (before) with the part number is REPC960917. Please follow the link below so you can order 2 of these (REPC960917) together with this set (SET-REPC960913-2). https://www.carparts.com/details/Cadillac/SRX/DriveWire/Oxygen_Sensor/2008/Base/6_Cyl_3-dot-6L/REPC960917.html

It’s a good idea to purchase the socket set specifically for these as well

Yes

Hi Lashawndra, I'm pleased to assist you. These sensors can be used for the upstream or downstream on a 2019 Chevrolet Impala LT 6 Cyl 3.6L. Click the link below to continue ordering our best offer today before the sale ends. I hope this helps and enjoy shopping! https://www.carparts.com/oxygen-sensor/drivewire/set-repc960913-2?can=CPGG4850_CSQA_20240326

This 2014 Gmc Arcadia Denali 3.6l awd. Had a bad y flex pipe was leaking a little loud, but no engine light codes, and ran good. So i bought and replaced a new flex y pipe along with the catalytic converters and 4 new oxygen sensors. I put it all together and started struck runs good much quieter, but now I have a engine code p0430 on. I looked over everything all the new cat's you could see trew no problem. Flex pipe good everything is tight no exhaust leaks. But I noticed That all 4 oxygen sensor where the same no difference at all for the upstream and downstream, is that correct how it is on this truck? I always thought the upstream was different from the downstream. Anything you may be able to suggest On what to do.

Hi Darrian, Thank you for initiating contact. Yes, these can be used for the upstream and downstream (before and after the catalytic converter) of the 2011 Chevrolet Camaro LT 6 Cyl 3.6L. Don't miss this opportunity to save big! Click the link below to order and enjoy our special sale price and limited stocks. Happy shopping! https://www.carparts.com/oxygen-sensor/drivewire/set-repc960913-2?can=CPGG4850_CSQA_20240503

Hi Gregory, I'm glad to assist you. This pair is for the downstream sensor for banks 1 and 2 of the selected vehicle application. Both should work fine. If your car appears in the vehicle fitment information below, it is a guaranteed fit part. I tried to look up your order using your email address and full name, but none showed up. Please check the sensor and try it. If it turns out to be wrong. You can have it returned. We have a 60-day return policy from the date of purchase (call our toll-free number for an RMA, 1-866-529-0412).

Hi Albert, I'm glad to assist you. No. They are different for the upstream and downstream locations. It is a pair of downstream oxygen sensors. The part number for the upstream sensor is REPS960910. Grab our low-price offer and click the link below to buy it today. Happy shopping! https://www.carparts.com/oxygen-sensor/drivewire/set-repc960913-2?can=CPJE1043_CSQA_20230319 (downstream sensors, pair) https://www.carparts.com/details/Cadillac/STS/DriveWire/Oxygen_Sensor/2006/Base/8_Cyl_4-dot-6L/REPS960910.html?can=CPJE1043_CSQA_20230319 (upstream sensor, order two pieces)