---
product_id: 452459818
title: "Qiilu Professional Knock Sensor for Mazda 3 BK 1.4 1.6 2.0 2.3 2003 2004 2005 2006 2007 2008 2009, Car Auto Sensor ZJ01-18-921"
brand: "qiilu"
price: "€ 96.13"
currency: EUR
in_stock: true
reviews_count: 5
category: "Qiilu"
url: https://www.desertcart.nl/products/452459818-qiilu-professional-knock-sensor-for-mazda-3-bk-1-4
store_origin: NL
region: Netherlands
---

# Enhances engine response & performance High-temp resistant up to 1562℉ Direct OEM fit, plug & play Qiilu Professional Knock Sensor for Mazda 3 BK 1.4 1.6 2.0 2.3 2003 2004 2005 2006 2007 2008 2009, Car Auto Sensor ZJ01-18-921

**Brand:** qiilu
**Price:** € 96.13
**Availability:** ✅ In Stock

## Summary

> 🔥 Knock out engine issues with precision power!

## Quick Answers

- **What is this?** Qiilu Professional Knock Sensor for Mazda 3 BK 1.4 1.6 2.0 2.3 2003 2004 2005 2006 2007 2008 2009, Car Auto Sensor ZJ01-18-921 by qiilu
- **How much does it cost?** € 96.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/452459818-qiilu-professional-knock-sensor-for-mazda-3-bk-1-4)

## Best For

- qiilu enthusiasts

## Why This Product

- Trusted qiilu brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Crafted from SUS310, it withstands extreme heat up to 1562℉ without fail.
- • **Boost Your Drive:** Improves engine response, unlocking your car’s true potential.
- • **Worry-Free Support:** Backed by 24-hour customer service and a 30-day refund policy.
- • **Precision Engine Tuning:** Pretested sensor ensures optimal knock detection for smoother rides.
- • **Seamless OEM Replacement:** Exact fit for Mazda 3 BK models (2003-2009), no modifications needed.

## Overview

The Qiilu Professional Knock Sensor (ZJ01-18-921) is a high-quality, direct replacement sensor designed specifically for Mazda 3 BK models from 2003 to 2009. Made from heat-resistant SUS310 material and tested at 1562℉, it ensures durability under extreme conditions. This plug-and-play sensor enhances engine performance by accurately detecting knock, backed by reliable customer support and a 30-day refund guarantee.

## Description

Specification:Material: HoseOEM: ZJ01-18-921Total Length: 46.5cm / 18.3inPackage Weight: Approx. 78g / 2.8ozFitment:for Mazda3 BK 1.4 2003/10-2009/06 1349 ccm, 62 KW, 84 PS3 BK 1.6 2003/10-2009/06 1598 ccm, 77 KW, 105 PS3 BK 2.0 2003/10-2009/06 1999 ccm, 110 KW, 150 PS3 BK 2.0 MZR-CD 2006/12-2009/06 1998 ccm, 105 KW, 143 PS3 BK 2.3 MPS 2006/12-2009/06 2261 ccm, 191 KW, 260 PS3 Stufenheck BK 2.0 MZR-CD 2006/12-2009/06 1998 ccm, 105 KW, 143 PSPackage Included:1 * Knock SensorNote:This is aftermarket replacement item but not genuine.Our brand:Qiilu is a professional seller producing premium Automotive Accessories,all items come with strict quality control.We strive to make every shopping experience pleasant and stress-free.Our main goal is not to make a sale, it is to make a customer!A customer who feels valued and satisfied with each and every item purchased,and is confident that we will continue to service them for years to come.Product Warranty:At Qiilu, we believe in our products. We provide friendly and easy-to-reach support.

Review: Cumple con lo que ofrece excelente producto funciona perfectamente
Review: No aplica

## Features

- FITMENT. Fit for Mazda 2003 2004 2005 2006 2007 2008 2009, 3 BK 1.4 1.6 2.0 2.3.
- HIGH TEMPERATURE RESISTANT. Made of high temperature resistant materials SUS310, every single item is heated at 1562℉, ensure it stands wear and tear.
- ORIGINAL STANDARD. Manufacturer part number for reference: ZJ01-18-921. Direct replacement for the original one, plug and play.
- FUNCTION. Pretested and precise sensor, high quality enough, it can improve engine response and performance.
- GUARANTEE. We provide our worry-free 24-Hour reply, 30-Day Refund and consistently friendly customer service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08CDC5VQ6 |
| Brand | Qiilu |
| Country of Origin | USA |
| Customer Reviews | 3.9 3.9 out of 5 stars (22) |
| Date First Available | 27 February 2021 |
| Item Dimensions LxWxH | 30 x 30 x 30 Millimeters |
| Item Weight | 90 g |
| Item dimensions L x W x H | 30 x 30 x 30 Millimeters |
| Item model number | ZJ01-18-921 |
| Manufacturer | Qiilu |
| Manufacturer Part Number | AC130007 |
| Material | Polystyrene |
| Maximum Supply Voltage | 5 Volts (DC) |
| Measuring Range | 100 - 140 dB |
| Mounting Type | Car Mount,Plug Mount |
| Output Type | electrical signal |
| Product Dimensions | 3 x 3 x 3 cm; 90 g |
| Specific Uses For Product | automotive, electronic ignition systems |
| Style | Durable |
| Upper Temperature Rating | 392 Degrees Fahrenheit |

## Product Details

- **Brand:** Qiilu
- **Item dimensions L x W x H:** 30 x 30 x 30 Millimeters
- **Material:** Polystyrene
- **Maximum Supply Voltage:** 5 Volts (DC)
- **Style:** Durable

## Images

![Qiilu Professional Knock Sensor for Mazda 3 BK 1.4 1.6 2.0 2.3 2003 2004 2005 2006 2007 2008 2009, Car Auto Sensor ZJ01-18-921 - Image 1](https://m.media-amazon.com/images/I/51vajgx38qL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***Z on 16 July 2025*

Cumple con lo que ofrece excelente producto funciona perfectamente

### ⭐ Review
*by F***Z on 25 June 2025*

No aplica

### ⭐⭐⭐⭐⭐ Review
*by J***V on 20 July 2023*

El producto es acorde a las especificaciones, llego mas rapido de lo esperado, estaba programado para llegar el 22 julio y llego el dia 19, el embalaje un poco ordinario para mi gusto, sin embargo eso no afecta la calidad del producto.

## Frequently Bought Together

- Knock Sensor, Car Auto Sensor ZJ01-18-92 Replacement for Mazda 3 BK 1.4 1.6 2.0 2.3 2003 2004 2005 2006 2007 2008 2009, Professional Knock Sensor
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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-11*