# Genius KG-100166 Disc Brake Rotor for 1991-2005 BMW Z4, BMW 320i and More - Front

### Performance Overview

Genius has been the undisputed leader in coated rotor manufacturing for the last 15 years thanks to it's groundbreaking lab engineered G-Cast™ iron cast and G-Coat™ dipped conative. Genius in-house engineered managed to develop the best combination of iron cast and coating to produce unmatched protection that adhere and stay durable for the lifetime of the rotor, without compromising on the rotor braking performan...

### Key Features

-   Engineered with with Carbon-Enhanced G-Cast™ (G11H18/G3000) iron castings to achieve an optimal braking performance (strength, stability, durability)
-   Exclusive G-Coat™ double-layer (8µm) protective coating provides rust protection on 100% of the non-braking surface
-   100% Precision Spin and Mill-Balanced for smoother stopping and zero vibration at any speed
-   Cross-Hatched smooth surface to improve the pad's ability to grip the rotor surface, especially during initial brake applications or in wet conditions
-   Double disc ground finish eliminates lateral run-out and DTV (disk thickness variation) issues on the rotor and improves pad-rotor bed-in
-   Tested for maximum tolerance to voluminous amount of constant thermal cycles

### Package include:

-   2x Disc Brake Rotor

### Vehicle Fitment

**Fitment Summary:** 1991-2005 BMW Z4, BMW 320i, BMW Z3, BMW 323Ci, BMW 323i, BMW 318ti

**Position:** Front

-   2003-2005 BMW Z4 — Position: Front | Fitment Precision: 2.5L
-   2001-2005 BMW 320i — Position: Front | Note: With 286mm Diameter Front Rotor
-   2001-2002 BMW Z3 — Position: Front | Fitment Precision: 2.5L
-   2000 BMW 323Ci — Position: Front | Fitment Precision: Coupe
-   2000 BMW 323i — Position: Front | Fitment Precision: Sedan
-   2000 BMW Z3 — Position: Front | Fitment Precision: Coupe/Roadster
-   1999 BMW 323i — Position: Front | Fitment Precision: Convertible
-   1999 BMW Z3 — Position: Front | Fitment Precision: 2.5L/2.8L
-   1998-1999 BMW 318ti — Position: Front
-   1998 BMW 323i — Position: Front | Fitment Precision: Sedan

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. This listing includes fitment data for 1991-2005 BMW Z4, BMW 320i, BMW Z3, BMW 323Ci, BMW 323i, BMW 318ti.

**What part number is this?**  
The listed part number is KG-100166.

**Is this product designed for direct replacement?**  
Yes. This Disc Brake Rotor 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

-   Disc Brake Rotor for BMW Z4
-   KG-100166 fitment
-   Genius Disc Brake Rotor
-   Front Disc Brake Rotor
-   1991-2005 BMW Z4 Disc Brake Rotor

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2003

BMW

Z4

Front

2.5L

2004

BMW

Z4

Front

2.5L

2005

BMW

Z4

Front

2.5L

2001

BMW

320i

Front

With 286mm Diameter Front Rotor

2002

BMW

320i

Front

With 286mm Diameter Front Rotor

2003

BMW

320i

Front

With 286mm Diameter Front Rotor

2004

BMW

320i

Front

With 286mm Diameter Front Rotor

2005

BMW

320i

Front

With 286mm Diameter Front Rotor

2001

BMW

Z3

Front

2.5L

2002

BMW

Z3

Front

2.5L

2000

BMW

323Ci

Front

Coupe

2000

BMW

323i

Front

Sedan

2000

BMW

Z3

Front

Coupe/Roadster

1999

BMW

323i

Front

Convertible

1999

BMW

Z3

Front

2.5L/2.8L

1998

BMW

318ti

Front

1999

BMW

318ti

Front

1998

BMW

323i

Front

Sedan

1998

BMW

323is

Front

1999

BMW

323is

Front

1998

BMW

328i

Front

Convertible

1999

BMW

328i

Front

Convertible

1997

BMW

Z3

Front

2.8L

1998

BMW

Z3

Front

2.8L

1996

BMW

328i

Front

1997

BMW

328i

Front

## Details

- **Price:** 92.86 CAD
- **Vendor:** Genius
- **Type:** Disc Brake Rotor
- **Tags:** 1991-2005 BMW Z4, Automotive Parts, BMW Z4, Brake Parts, Disc Brake Rotor, Front, Genius, KG-100166, Replacement Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 92.86 CAD | In stock |

## Images

- Genius KG-100166 Disc Brake Rotor for 1991-2005 BMW Z4, BMW 320i and More - Front

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> Source: [Standard Auto Part](www.standardautopart.com/products/genius-kg-100166-disc-brake-rotor-1991-2005-bmw-z4)
> Updated: 2026-06-10