---
product_id: 282230547
title: "ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor"
brand: "gm genuine parts"
price: "€ 163.57"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/282230547-acdelco-gm-original-equipment-213-3521-ignition-knock-detonation-sensor
store_origin: HR
region: Croatia
---

# Real-time engine timing signals Precision GM OE fit Prevents costly engine damage ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor

**Brand:** gm genuine parts
**Price:** € 163.57
**Availability:** ✅ In Stock

## Summary

> ⚡ Keep your GM engine running smooth and knock-free — because every millisecond counts!

## Quick Answers

- **What is this?** ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor by gm genuine parts
- **How much does it cost?** € 163.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/282230547-acdelco-gm-original-equipment-213-3521-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

- • **Damage Defense Mode:** Actively prevents pre-ignition knock, safeguarding your engine’s health.
- • **Sleek Chrome Finish:** Compact, stylish design that fits perfectly under your hood.
- • **Engine-Perfect Timing:** Sends instant signals to your ECM for flawless ignition timing adjustments.
- • **GM-Approved Reliability:** Factory-recommended part ensuring seamless compatibility and peak performance.
- • **Durability You Can Trust:** Built to GM OE specs for long-lasting, robust engine protection.

## Overview

The ACDelco GM Original Equipment 213-3521 Ignition Knock Sensor is a GM-recommended, precision-engineered component designed to detect engine knock and send real-time signals to the ECM. Manufactured to exact GM OE specifications, it ensures optimal ignition timing, prevents engine damage from pre-ignition, and guarantees reliable, durable performance for your GM vehicle.

## Description

ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor

## Features

- Sends signals to the engine control module (ECM) to adjust timing
- Helps prevent damage to the engine caused by pre-ignition
- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ACDelco |
| Brand | GM GENUINE PARTS |
| Model | GM Original Equipment |
| Product Dimensions | 6.86 x 6.86 x 5.84 cm; 81.65 g |
| Item model number | 213-3521 |
| Exterior | Chrome |
| Manufacturer Part Number | 213-3521 |
| OEM Part Number | 12589867 |
| Item Weight | 81.6 g |

## Product Details

- **Brand:** GM GENUINE PARTS
- **Item dimensions L x W x H:** 6.9 x 6.9 x 5.8 centimeters
- **Material:** Ceramic
- **Item weight:** 82 g
- **Style:** Modern

## Images

![ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor - Image 1](https://m.media-amazon.com/images/I/61GLe84g7LL.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.

## 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

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**Shop now:** [https://www.desertcart.hr/products/282230547-acdelco-gm-original-equipment-213-3521-ignition-knock-detonation-sensor](https://www.desertcart.hr/products/282230547-acdelco-gm-original-equipment-213-3521-ignition-knock-detonation-sensor)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-12*