DBA DBA43030S 4000 Series T3 Slotted Front Brake Rotor

The DBA DBA43030S is a 4000 Series T3 slotted performance brake rotor engineered as a direct-fit front replacement for Mercedes-Benz ML, GL, GLE, and GLS models on the W166 and X166 platforms. Designed and manufactured by Disc Brakes Australia (DBA), this rotor delivers a meaningful upgrade over standard OEM equipment with no mechanical modifications required.

T3 Tri-Symmetrical Slot Design:

The T3 slot pattern features precise CNC-machined tri-symmetrical slots that increase the number of exit points for brake pad friction dust and gases. This promotes a quieter, more responsive, and smoother brake pedal feel while improving braking consistency and effectiveness on every stop. The bi-directional slot design also makes this rotor universally suitable for left or right fitment.

Key Features:

• XG-150 High Carbon Alloyed Iron — Cast from a premium high-carbon alloy that minimizes warping and cracking while improving thermal capacity and service life
• Thermal Stability Profiling (TSP) — DBA's proprietary heat treatment process subjects castings to prolonged, controlled heat cycles to relieve internal stress and maximize thermal stability under heavy braking
• Kangaroo Paw Ventilation — 144 diamond and teardrop patterned pillars deliver up to 30% increased surface area and up to 20% improved cooling efficiency compared to traditional straight-vane designs
• Thermo-Graphic Heat Paint (TGHP) — Color-coded paint markings on the rotor face change color at specific temperature thresholds, allowing drivers to monitor peak braking temperatures and select appropriate brake pads
• CBN Machine-Turned Finish — Cubic Boron Nitride machining minimizes disc thickness variation, reducing the risk of pad knock and premature wear
• Rust-Resistant Coating — Non-friction areas are painted to prevent corrosion and maintain appearance
• Slotted Friction Surface — Slots combat brake pad glazing and out-gassing, maintaining consistent pad bite and reducing brake fade under hard use
• Direct OEM Replacement — Bolts on without mechanical changes; sold individually

The DBA43030S is well-suited for Mercedes-Benz SUV owners seeking a durable, high-performance front rotor upgrade for spirited street driving or demanding real-world conditions.