Mercedes W166 Vented Brake Disc Front Left Right N/O/S A1664211500 Set Pair

Mercedes W166 Vented Brake Disc Front Left Right N/O/S Set Pair is an original set of braking system components designed for the front axle, covering both the left and right sides. The use of a ventilated design ensures stable heat dissipation, which translates into consistent braking performance under typical road conditions. This is a solution for drivers who want to maintain factory brake operating parameters in their Mercedes.

Specifications and technical data

• SKU: A1664211500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664211500
• Substitutable numbers: A1664211500, A 166 421 15 00
• Location on the vehicle: Front, Left, Right
• Part type: Brake Disc Rotor
• Category: Brake Disc Rotors

Purpose and vehicle compatibility

The set of front, ventilated brake discs has been designed specifically for the Mercedes W166 family models. The components are prepared for installation on the front axle, on both the left and right sides, which allows for the simultaneous replacement of both discs and ensures uniform system operation. Thanks to the use of the manufacturer's original design, the correct dimensional tolerances, geometry, and thermal characteristics are maintained, which facilitates installation and compatibility with factory calipers and brake pads.

Construction and operating characteristics

The ventilated design of the discs promotes effective cooling during more intensive braking, reducing the risk of overheating and loss of performance. The properly designed working surface ensures stable contact with the pad, which translates into a predictable brake pedal feel. The choice of material and manufacturing technology in original Mercedes discs allows for an optimal compromise between durability, comfort (reduction of vibrations and noise), and safety. This is particularly important in heavier SUV segment vehicles, where the braking system is under greater load.

Condition of components and practical application

The offered set of brake discs is in used condition, which allows for an economical repair of the braking system while maintaining the manufacturer's original specifications. This is a solution for users who are looking for a reasonable balance between cost and quality of parts, avoiding random replacements of uncertain origin. Replacing both discs on the front axle in a single service process helps maintain even pad wear, vehicle stability during braking, and proper cooperation with safety systems such as ABS or ESP.

Benefits of choosing original used discs

Using original, used braking system components is often a conscious service decision – especially in the case of several-year-old vehicles, where both safety and repair costs matter. It is worth paying attention to the selection of other system elements, such as calipers or pads. You can find more practical tips in the article: how to reduce brake repair costs by choosing proven recycled parts. If you are planning long-term use of the car or are thinking about its future resale, the following material may also be helpful: original used parts vs. car value at resale, which shows how the selection of the right components affects the perceived quality of the vehicle.

Braking system completion and further purchases

During comprehensive brake maintenance, it is worth considering simultaneous inspection of other elements – lines, calipers, and pads – to fully utilize the potential of the discs. If you need other components from this group, check our category Brake discs, where you will find a wide selection of original parts matched to various Mercedes models.