--- product_id: 1301701 title: "213-3521 (12589867) Ignition Knock (Detonation) Sensor" brand: "gm genuine parts" price: "£55.09" currency: GBP in_stock: true reviews_count: 10 category: "Gm Genuine Parts" url: https://www.desertcart.co.uk/products/1301701-213-3521-12589867-ignition-knock-detonation-sensor store_origin: GB region: United Kingdom --- # 12V DC max voltage Flange mount for perfect fit Up to 250°F operating temp 213-3521 (12589867) Ignition Knock (Detonation) Sensor **Brand:** gm genuine parts **Price:** £55.09 **Availability:** ✅ In Stock ## Summary > 🚗 Knock out engine issues with GM’s trusted sensor! ## Quick Answers - **What is this?** 213-3521 (12589867) Ignition Knock (Detonation) Sensor by gm genuine parts - **How much does it cost?** £55.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1301701-213-3521-12589867-ignition-knock-detonation-sensor) ## Best For - gm genuine parts enthusiasts ## Why This Product - Trusted gm genuine parts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Backed by GM Warranty:** 24-month unlimited mile warranty for peace of mind - • **OEM-Grade Reliability:** Manufactured to exact GM specs for flawless fit and durability - • **Plug & Play Installation:** Flange mount design ensures seamless replacement with no guesswork - • **Durability Under Pressure:** Operates flawlessly up to 250°F to withstand engine heat - • **Precision Engine Protection:** Monitors and eliminates engine knock for peak performance ## Overview The GM Genuine Parts 213-3521 Ignition Knock Sensor is a factory-recommended replacement designed to detect and prevent engine knock by sending precise vibration signals to your vehicle’s control module. Built with piezoelectric material and engineered to GM OE standards, it guarantees perfect fit, durability, and optimal engine performance under high temperatures up to 250°F. Backed by a 24-month unlimited mile warranty, this sensor is the essential upgrade for maintaining your GM vehicle’s reliability and efficiency. ## Description ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle's original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Review: Great OEM knock sensor at half the price of the local auto stores. - These knock sensors were a direct fit for my 2001 5.3L Chevy Silverado. They were shipped loosely bagged inside the desertcart box with some air pillows but arrived undamaged. This is an area of concern that has been discussed however the parts arrived undamaged. One thing to note is that although this is an OEM part, the product is assembled and made in mexico. Upon installation however that did not seem to matter as the sensor performed as it should. These same sensors cost twice as much at the local auto parts store. desertcart had the best value with it being just slightly over another websites price but having two day shipping with prime. The knock sensor performed flawlessly at first start up and its been a week now with no problems. No more CEL :) Some things to note if you are performing the knock sensor job on a GM: Make sure you have an open weekend to perform this job, It will take upwards of 6-8 hours. As noted below, since the manifold will be off, now will be an excellent time to replace optional parts. You might also want to do additional maintenance such as cleaning the IAC, MAF and throttle body. Parts you will need: 2 Knock sensors (usually only the rear gets damaged but since this is a large job you might as well swap them both) 1 Knock sensor harness (The old one will be useless. The boot wont seal tight and the connectors will be brittle and likely break) 1 Intake manifold gasket (This is a given. You do not want to do this and have a vacuum leak after putting it all back together) 1 Throttle body to intake manifold gasket (You will problably unmount the throttle body for easier removal and cleaning) 1 RTV tube (High temp is preferred. This is used to create a dam and keep water from entering the knock sensor and corroding it) Miscellaneous Optional: 1 Bottle of Throttle Body Cleaner (While the whole manifold is off you may take this time to clean the throttle body thoroughly. 1 bottle of MAF cleaner (To clean the Mass Air Flow sensor and Idle Air Control Valve) Some Shop Towels: (You will be doing alot of cleaning of parts caked with grease/dirt/grime) Shop Vac: (No matter how careful you are chances are leaves or debris will fall into the cavities of the valves/knock sensor while removing the manifold. A shop vac makes quick haste of cleaning all this debris) Other parts to consider replacing while you have the manifold off: Valve cover gaskets w/grommets (This is a perfect time to replace the valve cover gaskets if you notice any small oil leaks) Heater Hose Quick Connectors: (These things are also notorious for breaking in alot of GM trucks near the firewall. If you have never replaced them, now would be a good time to replace them since you will have easy access to them) Note: I did not include any part #'s as they will vary per vehicle application. Review: Great price for oem good ones - Good price for o.e.m. good ones that work and stay working unlike the cheap replacements previous owner bought and failed in under 6 months. ## Features - GM recommended replacement part for your GM vehicle’s original factory component - Offering the quality, reliability, and durability of GM OE - Manufactured to GM OE specification for fit, form, and function - GM-recommended replacement part for your GM vehicle’s original factory component ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000K02EDG | | Best Sellers Rank | #23,001 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Replacement Detonation Sensors | | Brand Name | GM GENUINE PARTS | | Customer Reviews | 4.4 4.4 out of 5 stars (2,244) | | Global Trade Identification Number | 00707773013601 | | Included Components | Ignition Knock (Detonation) Sensor | | Item Dimensions | 2.7 x 2.7 x 2.3 inches | | Item Type Name | Ignition Knock (Detonation) Sensor | | Item Weight | 0.18 Pounds | | Manufacturer | ACDelco | | Material Type | Piezoelectric Material | | Maximum Supply Voltage | 12 Volts (DC) | | Model | 213-3521 | | Mounting Type | Flange Mount | | Output Type | Push Button | | Part Number | 12589867 | | Specific Uses For Product | engine protection and performance optimization in GM vehicles | | Style Name | Modern | | UPC | 707773013601 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 250 Degrees Fahrenheit | | Warranty Description | 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. | ## Product Details - **Brand:** GM GENUINE PARTS - **Item Weight:** 0.18 Pounds - **Item dimensions L x W x H:** 2.7 x 2.7 x 2.3 inches - **Material:** Piezoelectric Material - **Style:** Modern ## Images ![213-3521 (12589867) Ignition Knock (Detonation) Sensor - Image 1](https://m.media-amazon.com/images/I/71Ujkyq+BeL.jpg) ## Questions & Answers **Q: I've noticed cases where this product was shipped with sub-standard care for a product so fragile, has this been taken into account and resolved?** A: Mine were in little plastic bags banging around I demanded replacements so i didn't have to take the top of my engine apart a month later because they were damaged, Amazon did a little better the next time putting them in a envelope! Amazon has no brains when it comes to packing the will either wrap a pet rock like its a fragile Xmax ornament or throw a fragile Crystal wine glass in a huge box with a small sheet of brown paper, And if you complain about to many damaged items they will threaten you with canceling your account!! with no refund of any gift card balance !!!!!!!!!!!! I had a $1200.00 camera lens with no protection it weighed over 6 lbs tear a hole in the box and get lost in transit and amazon sent me a email that they were shutting my account down and i would loose the $500 gift card balance, there excuse? I complained to much about damages to my orders some lost like the lens **Q: 2004 chevy silverado z71 crew cab 5.3L do you know how many i need and do you know if is the same or diferent part number** A: You need two and the wiring harness. DO NOT BUY THESE EXCEPT FROM CHEVY DEALER!!!! THESE ARE CHEAP ASS KNICK OFFS THAT DO NOT......REPEAT.....DO NOT WORK.......spend the extra money or you will do the job twice. Second time with factory parts.......trust me!!! **Q: Is this item made in México?** A: Made in Mexico or not (mine weren't labeled) these failed. I'm trying third set from brick and mortar store. I will never trust a sensor to any online company again. **Q: Is this a genuine AC Delco part or not??? some reviewers say it is and some say its not** A: If you purchase these from OverstockDirect you will receive Genuine ACDelco in ACDelco packaging. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great OEM knock sensor at half the price of the local auto stores. *by H***R on September 17, 2016* These knock sensors were a direct fit for my 2001 5.3L Chevy Silverado. They were shipped loosely bagged inside the amazon box with some air pillows but arrived undamaged. This is an area of concern that has been discussed however the parts arrived undamaged. One thing to note is that although this is an OEM part, the product is assembled and made in mexico. Upon installation however that did not seem to matter as the sensor performed as it should. These same sensors cost twice as much at the local auto parts store. Amazon had the best value with it being just slightly over another websites price but having two day shipping with prime. The knock sensor performed flawlessly at first start up and its been a week now with no problems. No more CEL :) Some things to note if you are performing the knock sensor job on a GM: Make sure you have an open weekend to perform this job, It will take upwards of 6-8 hours. As noted below, since the manifold will be off, now will be an excellent time to replace optional parts. You might also want to do additional maintenance such as cleaning the IAC, MAF and throttle body. Parts you will need: 2 Knock sensors (usually only the rear gets damaged but since this is a large job you might as well swap them both) 1 Knock sensor harness (The old one will be useless. The boot wont seal tight and the connectors will be brittle and likely break) 1 Intake manifold gasket (This is a given. You do not want to do this and have a vacuum leak after putting it all back together) 1 Throttle body to intake manifold gasket (You will problably unmount the throttle body for easier removal and cleaning) 1 RTV tube (High temp is preferred. This is used to create a dam and keep water from entering the knock sensor and corroding it) Miscellaneous Optional: 1 Bottle of Throttle Body Cleaner (While the whole manifold is off you may take this time to clean the throttle body thoroughly. 1 bottle of MAF cleaner (To clean the Mass Air Flow sensor and Idle Air Control Valve) Some Shop Towels: (You will be doing alot of cleaning of parts caked with grease/dirt/grime) Shop Vac: (No matter how careful you are chances are leaves or debris will fall into the cavities of the valves/knock sensor while removing the manifold. A shop vac makes quick haste of cleaning all this debris) Other parts to consider replacing while you have the manifold off: Valve cover gaskets w/grommets (This is a perfect time to replace the valve cover gaskets if you notice any small oil leaks) Heater Hose Quick Connectors: (These things are also notorious for breaking in alot of GM trucks near the firewall. If you have never replaced them, now would be a good time to replace them since you will have easy access to them) Note: I did not include any part #'s as they will vary per vehicle application. ### ⭐⭐⭐⭐⭐ Great price for oem good ones *by J***Y on February 15, 2026* Good price for o.e.m. good ones that work and stay working unlike the cheap replacements previous owner bought and failed in under 6 months. ### ⭐⭐⭐⭐⭐ Use with relocation kit... *by J***Z on January 20, 2026* Worked excellent with Knox sensor relocation kit which I highly recommend u do with these Knox sensors. Unless u want to keep doing this job over and over ## Frequently Bought Together - ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor - Genuine GM 12601822 Knock Sensor Wire - FEL-PRO MS 98016 T Engine Intake Manifold Gasket Set for Chevrolet Silverado 1500 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/1301701-213-3521-12589867-ignition-knock-detonation-sensor](https://www.desertcart.co.uk/products/1301701-213-3521-12589867-ignition-knock-detonation-sensor) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-22*