Used 2017-2021 Mazda CX-5 CX-9 Ignition Knock Detonation Sensor P31E18921 OEM ⚡

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Used 2017-2021 Mazda CX-5 CX-9 Ignition Knock Detonation Sensor P31E18921 OEM ⚡

Name: Used 2017-2021 Mazda CX-5 CX-9 Ignition Knock Detonation Sensor P31E18921 OEM ⚡
Brand: Mazda
SKU: 2904
Price: 28.07 USD
Availability: InStock

Fits / from: Mazda CX-5 2018 Stock no.: 2904 Category: Knock Sensor Manufacturer part no. (MPN): P31E18921 , P31E 18921 , P31E-18921 Condition: Used — OEM

$28.07

Free shipping · free local pickup

In stock

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✅ Genuine OEM — removed from a real vehicle in our US yard
✅ The photo is the exact part you receive
✅ Fitment-checked · free 30-day returns
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About this part

Genuine used OEM 2017-2021 Mazda CX-5 CX-9 Ignition Knock Detonation Sensor P31E18921 OEM ⚡. Removed from a Mazda CX-5 2018. Manufacturer part number (MPN): P31E18921 , P31E 18921 , P31E-18921. In stock at our US warehouse, photographed as the actual item you receive, and fitment-checked.

Not sure it fits your car? Send us a quick request — our team confirms fitment, availability and price fast.

Specifications

Category	Knock Sensor
Fits / from	Mazda CX-5 2018
MPN	P31E18921 , P31E 18921 , P31E-18921
Stock number	2904
Condition	Used — OEM, tested
Availability	In stock

Questions & answers

Will this part fit my Mazda CX-5?

It was removed from a Mazda CX-5 2018 and fits that vehicle and compatible Mazda CX-5 variants. Not sure? Send a quick request with your car details — our team confirms fitment before you buy.

Is this a genuine OEM part?

Yes — an original manufacturer (OEM) part removed from a real vehicle in our US yard, not an aftermarket copy.

What condition is it in?

Used and tested. The photos on this page are the exact item you receive — no stock photos.

How do I order — there is no online checkout?

Send a request with your name and phone. Our team confirms availability and price and helps you complete the purchase and shipping. Free 30-day returns.

Do you ship, or can I pick it up?

Free local pickup at our New Jersey yard, and we ship across the USA. Worldwide shipping is available on request.