# WeatherTech 81921IM Dark Tint Rear Side Window Deflector for 2018-2024 BMW X3

### Performance Overview

The WeatherTech Side Window Deflector is precision-machined for a perfect fit with your vehicle's window channel. They are made from the highest quality acrylic material available and is designed to ensure maximum performance with captivating style. The Side Window Deflector allows for fresh air to move into the vehicle while dissipating interior heat and keeping the rain out. The low-profile design ensures a near OEM look making this accessory perfect for a subtle boost in style. Installation is a breeze, no drilling necessary.

### Key Features

-   The WeatherTech Side Window Deflector is precision-machined for a perfect fit with your vehicle's window channel.
-   They are made from the highest quality acrylic material available and is designed to ensure maximum performance with captivating style.
-   The Side Window Deflector allows for fresh air to move into the vehicle while dissipating interior heat and keeping the rain out.
-   The low-profile design ensures a near OEM look making this accessory perfect for a subtle boost in style.
-   WeatherTech part number 81921IM.

### Vehicle Fitment

-   2018 BMW X3 — Position: Rear Side Windows; Fitment Precision: M40I, XDRIVE30I
-   2019 BMW X3 — Position: Rear Side Windows; Fitment Precision: M40I, SDRIVE30I, XDRIVE30I
-   2020 BMW X3 — Position: Rear Side Windows; Fitment Precision: M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30E, XDRIVE30I
-   2021 BMW X3 — Position: Rear Side Windows; Fitment Precision: M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30E, XDRIVE30I
-   2022 BMW X3 — Position: Rear Side Windows; Fitment Precision: M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30I
-   2023 BMW X3 — Position: Rear Side Windows; Fitment Precision: M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30I
-   2024 BMW X3 — Position: Rear Side Windows; Fitment Precision: M, M40I, SDRIVE30I, XDRIVE30I

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is 81921IM.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   Side Window Deflector for BMW X3
-   81921IM fitment
-   WeatherTech Side Window Deflector
-   Rear Side Windows Side Window Deflector
-   2018 BMW X3 Side Window Deflector

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2018

BMW

X3

Rear Side Windows

M40I, XDRIVE30I

2019

BMW

X3

Rear Side Windows

M40I, SDRIVE30I, XDRIVE30I

2020

BMW

X3

Rear Side Windows

M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30E, XDRIVE30I

2021

BMW

X3

Rear Side Windows

M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30E, XDRIVE30I

2022

BMW

X3

Rear Side Windows

M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30I

2023

BMW

X3

Rear Side Windows

M, M COMPETITION, M40I, SDRIVE30I, XDRIVE30I

2024

BMW

X3

Rear Side Windows

M, M40I, SDRIVE30I, XDRIVE30I

## Details

- **Price:** 70.4 CAD
- **Vendor:** WeatherTech
- **Type:** Side Window Deflector
- **Tags:** 2018 BMW X3, 2019 BMW X3, 2020 BMW X3, 2021 BMW X3, 2022 BMW X3, 2023 BMW X3, 2024 BMW X3, 81921IM, Automotive, Automotive Performance, Direct Replacement, M, M COMPETITION, M40I, Rear Side Windows, SDRIVE30I, Side Window Deflector, Vehicle Specific, WeatherTech, XDRIVE30E, XDRIVE30I

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 70.40 CAD | In stock |

## Images

- WeatherTech 81921IM Dark Tint Rear Side Window Deflector for 2018-2024 BMW X3

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> Source: [Standard Auto Part](www.standardautopart.com/products/weathertech-bmw-x3-side-window-deflector-81921im)
> Updated: 2026-06-17