---
product_id: 273815759
title: "FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor"
brand: "motisen"
price: "$61.71"
currency: USD
in_stock: true
reviews_count: 9
category: "Motisen"
url: https://www.desertcart.us/products/273815759-fn11-21-551-fn1121551-917-649-5s4923-transmission-speed-sensor
store_origin: US
region: United States of America
---

# Direct-fit, no programming needed ±3% accuracy sensor 1-year warranty protection FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor

**Brand:** motisen
**Price:** $61.71
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your Mazda’s heartbeat with precision speed sensing!

## Quick Answers

- **What is this?** FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor by motisen
- **How much does it cost?** $61.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/273815759-fn11-21-551-fn1121551-917-649-5s4923-transmission-speed-sensor)

## Best For

- motisen enthusiasts

## Why This Product

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

## Key Features

- • **OEM-Grade Durability:** Built with copper, stainless steel & plastic for long-lasting, reliable performance
- • **Trusted Quality Assurance:** Each sensor is tested, calibrated, and backed by a responsive 1-year warranty
- • **Plug-and-Play Installation:** No special tools or programming required—get back on the road faster
- • **Precision Engineered for Mazda:** ±3% measurement accuracy ensures flawless speed data for models 2002-2018
- • **Comprehensive Vehicle Compatibility:** Fits Mazda 2, 3, 5, 6, CX-7, Axela, Atenza & more—one sensor, multiple models

## Overview

The MOTISEN FN11-21-551 Transmission Speed Sensor delivers OEM-level accuracy (±3%) and durability for a wide range of Mazda vehicles (2002-2018). Designed for effortless plug-and-play installation without programming, it ensures reliable speed data to eliminate transmission error codes. Crafted from premium copper, plastic, and stainless steel, this sensor is rigorously tested and backed by a 1-year warranty, making it the go-to upgrade for Mazda owners seeking performance and peace of mind.

## Description

Buy MOTISEN FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor | Fit for Mazda 2 5 6 CX-7 2005-2018,3 AXELA ATENZA TENZA 2002 2003 2004 2005 2006 2007 2008: Transmission Speed - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Mazda 5 p0791 intermediate shaft sensor code only - Mazda 5 and 3s have 1 (2 prong) input speed sensor, and 2 (3 prong) output sensors, one next to the tcm on top of the transmission, and the 3rd that fixed my p0791 was the intermediate shaft output sensor (they are interchangable) is on the backside of the transmission underneath a heat shield. 10mm bolts for the shield, and for the part. Be aware that it will be full of transmission fluid. What I did was made sure the new one was clean and rubbed a little transmission fluid on the oring, loosened, and removed the bolt- then very quickly wiggle the old out with the left hand, and have the new one in your right hand to quickly plug the leak. Make sure you check your fluid level with the car running and top it off with type M or appropriate fluid afterwards. I lost like 200ml at most. Works so far.
Review: Great quality, fast shipping - Very good quality!!

## Features

- Interchange Part Number:917-649 FN11-21-551 723911 ADM57218 5S4923 SU6385 SC154 FN1121551 184200-0030 1842000030 FN12-21-551A FN11-21-551 SU6385 SU9767 5S4923 FN1121551 FN1221551A SC492 5S4923 SC154 0905047 090-5047 SU6385 GT7610-248 SN7139
- Compatible with: MAZDA 2 3 5 6 626 Atenza Mk Axela Cx-7 Tenza Premacy
- Service: One-Year-Warranty;If you meet any problem of quality,compatibility and installation, please not hesitate to contact us. You will get a quick response and solution
- Assurance: Always provide professional, premium and high-quality, brand new vehicle sensor products. all tested and calibration during the manufacturing process for reliability, durability, and performance
- Notice: To avoid mistakes, please carefully check our product pictures,vehicle fitment and part no.to make sure they are compatible with your vehicle
- Quality: Featuring stable performance, durability, and longevity; tested before shipment; packaged in boxes; made of high-quality materials; meeting OEM standards and specifications; utilizing advanced technology; eliminates failure light codes.
- Easy Installation:easy to install without the need for special tools. Enhances performance; designed as direct replacements and no need calibration, programming, or modification.
- Installation Steps: 1. Diagnose the trouble codes to find the faulty sensor position; 2. Remove it from the connector; 3. Plug in the new sensor; 4. Clear the trouble faulty codes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08SHPXSBH |
| Best Sellers Rank | #1,405,044 in Automotive ( See Top 100 in Automotive ) #1,243 in Automotive Replacement Transmission Speed Sensors |
| Brand | MOTISEN |
| Brand Name | MOTISEN |
| Customer Reviews | 4.1 out of 5 stars 59 Reviews |
| Item Highlight | Fit for Mazda 2 5 6 CX-7 2005-2018,3 AXELA ATENZA TENZA 2002 2003 2004 2005 2006 2007 2008 |
| Manufacturer | MOTISEN |
| Material | Copper, Plastic, Stainless Steel |
| Material Type | Copper, Plastic, Stainless Steel |
| Measurement Accuracy | ±3% |
| Model | FN11-21-551 |
| Mounting Type | Flange Mount |
| Number of Items | 1 |
| Output Type | Push-Pull |
| Part Interchange Info | 917-649 FN11-21-551 723911 ADM57218 5S4923 SU6385 SC154 FN1121551 184200-0030 1842000030 FN12-21-551A FN11-21-551 SU6385 SU9767 5S4923 FN1121551 FN1221551A SC492 5S4923 SC154 0905047 090-5047 SU6385 GT7610-248 SN7139 |
| Part Number | MOX066 |
| Sensing Distance | 10 meters |
| Specific Uses For Product | Speed |
| Style | Modern |
| Style Name | Modern |
| UPC | 717186591795 |
| Warranty Description | 1 year warranty |

## Product Details

- **Brand:** MOTISEN
- **Material:** Copper, Plastic, Stainless Steel
- **Measurement Accuracy:** ±3%
- **Mounting Type:** Flange Mount
- **Style:** Modern

## Images

![FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor - Image 1](https://m.media-amazon.com/images/I/51yKUHwKeeL.jpg)
![FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor - Image 2](https://m.media-amazon.com/images/I/51Qqy4kIvuL.jpg)
![FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor - Image 3](https://m.media-amazon.com/images/I/71xYikNmLgL.jpg)
![FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor - Image 4](https://m.media-amazon.com/images/I/71hie0DuS6L.jpg)
![FN11-21-551 FN1121551 917-649 5S4923 Transmission Speed Sensor - Image 5](https://m.media-amazon.com/images/I/717WUngrsPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Mazda 5 p0791 intermediate shaft sensor code only
*by K***Y on November 2, 2021*

Mazda 5 and 3s have 1 (2 prong) input speed sensor, and 2 (3 prong) output sensors, one next to the tcm on top of the transmission, and the 3rd that fixed my p0791 was the intermediate shaft output sensor (they are interchangable) is on the backside of the transmission underneath a heat shield. 10mm bolts for the shield, and for the part. Be aware that it will be full of transmission fluid. What I did was made sure the new one was clean and rubbed a little transmission fluid on the oring, loosened, and removed the bolt- then very quickly wiggle the old out with the left hand, and have the new one in your right hand to quickly plug the leak. Make sure you check your fluid level with the car running and top it off with type M or appropriate fluid afterwards. I lost like 200ml at most. Works so far.

### ⭐⭐⭐⭐⭐ Great quality, fast shipping
*by P***A on August 8, 2025*

Very good quality!!

### ⭐ Sensor
*by Y***A on April 9, 2026*

Mala calidad, mi auto siguio con el mismo problema

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-01*