★★★★★
November 18, 2025
Got exactly what I needed at a good price, my truck is running like a dream now! Thank you.
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.
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 13 vehicles spanning 1994-2004.
| Year | Make | Model | Description |
|---|---|---|---|
| 1994-1999 | Lexus | ES300 | Lexus ES300 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1998-2004 | Lexus | GS300 | Lexus GS300 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1998-2000 | Lexus | LS400 | Lexus LS400 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1999 | Lexus | RX300 | Lexus RX300 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1998-2000 | Lexus | SC400 | Lexus SC400 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 2001-2002 | Toyota | 4Runner | Toyota 4Runner 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1995-1999 | Toyota | Avalon | Toyota Avalon 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1994-2001 | Toyota | Camry | Toyota Camry V6 3.0L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1999 | Toyota | Solara | Toyota Solara V6 3.0L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 1995-1998 | Toyota | T100 | Toyota T100 V6 3.4L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 2001-2004 | Toyota | Tacoma | Toyota Tacoma V6 3.4L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 2000 | Toyota | Tundra | Toyota Tundra V6 3.4L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| 2004 | Toyota | Tundra | Toyota Tundra V6 3.4L 2 Piece Engine Knock Sensor Set TRQ ESA71373 |
| Brand Label | Part Number |
|---|---|
| autopartsIn | 1904-307112 |
| TRQ | ESA94870 |
| T Series | KS81T |
| Walker Products | 242-1040 |
| Toyota | 8961512040 |
| Lexus | 8961512040 |
| SMP | KS81 |
| Wells | 5S2254 |
| Dorman - OE Solutions | 926-387 |
| Standard Ignition | KS81 |
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.
Created on:
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.
Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to be working with our 1998 Toyota Camry. We're going to show you how to remove and replace your knock sensor on the back side of the engine.
This part senses pre-ignition or spark knock inside of the motor, which means there's an issue with compression, ignition timing, fuel mixture, something that's causing the air fuel inside of your cylinder to go off before it was supposed to. This is detrimental to the engine and all of it's internal components and can cause catastrophic engine failure. Your knock sensor picks up on this little vibration or noise that you normally wouldn't hear inside of the car and de-tunes the engine accordingly to make sure that it runs within safe parameters.
If you like this video, please click subscribe. We have a ton more info on this car, as well as many other makes and models. If you want this part for your vehicle, it's available from 1AAuto.com. You can follow the link down in the description.
The only item we'll need for this repair is a 27 millimeter socket and ratchet. We're doing this on a lift, but this can easily be done at home with a jack and jack stand.
If you raise and support the front of the vehicle, you can find the sensor below the intake manifold on the back side of the engine. You can reach up between the CV axle and the exhaust. Push down on the tab. Remove the electrical connector. Use a 27 millimeter socket and ratchet.
Here we have our old knock sensor that we removed from the vehicle; and our new knock sensor from 1AAuto.com. As you can see, we have the same single wire connector at the top. We have the same threads on the sensor end here. We have the same 27 millimeter hex for our wrench. So, if your knock sensor has gone bad and is causing the check engine light on your vehicle, this new part from 1A Auto is going to go in, direct fit, just like your original equipment, and fix you up right.
Install your new knock sensor into the threads on the back the motor. Bring it down as tight as you can by hand. Then we'll finishing snugging it up with a 27 millimeter socket and ratchet. Reconnect the electrical connector, and you're good to go.
Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please visit 1AAuto.com. Also check out our other helpful how-to and diagnosis videos.
ESA71373
Got exactly what I needed at a good price, my truck is running like a dream now! Thank you.
Great knock sensors! Took a little time to get everything done but they work great.
I haven't installed yet so not sure if there right for Toyota Tundra 2002 v8
I looked around for these knock sensor and they were pretty expensive everywhere I looked. I got an email from 1 A-Auto about product for low price and sure enough, they were there at a very affordable price. I was skeptical about buying but gave it a shot. Dont regret it at all. It's a quality product and fit just right. Came in quick and on time! That 1 A-Auto
My name is GIna Kuntz, Im a 29 year old (F) college student and this is my review for my first 1A Auto purchase. What I had ordered was a pair of engine knock sensors for my 1998 Toyota Camry. The product had the best price versus its competitors. The product had an easy to follow tracking number and it arrived exactly on time. The product came in top condition because it was packaged correctly. 1A Auto also has video instructions, pictures and descriptions on hot to install the product on their website, which makes it easy for a person like me to understand. Id highly recommend 1A Auto to anyone who needs to save money and do the job themselves. Dont get ripped off my a local shop for something you only have to pay a fraction of the price for. Order from 1A Auto today! Thank You 1A Auto!
Customer Service was great in helping me get the right parts. The car seems to be running fine now.
The service was awesome and the quality and shipping was right on. I was very pleased with 1A Auto...
I replaced both knock sensors on my 99, 4 Runner, 3.4, that has 353,550 miles. The sensors worked like a charm! Since I was there, I replaced the wiring harness also. After initial start up there was some knocking as the ECM needed to go through re-learning process. I highly recommend the product!
But it fixed the problem at a fracctiin of the cost.
was well done I understood and help me and to clarify that
The best way to see what style you have would to be to contact your local dealership with your VIN. Please let us know if you have any further questions.
