CARFIX

RDA Brakes Standard Disc Brake Rotor Vented 330mm

RDA Brakes — RDA Brakes Standard Disc Brake Rotor Vented 330mm — part number RDA7925

RDA Brakes · Part number RDA7925 · NZ$154.00 incl. GST

RDA Brakes Standard Disc Brake Rotor Vented 330mm by RDA Brakes, part number RDA7925.

Price

NZ$154.00 including GST. Part number RDA7925.

Fits these vehicles

Description

Disc Brake Rotor Replacement Guide — Featuring RDA
> Disc brake rotors are those metal discs doing the rounds with your wheels, giving your brake pads something to squeeze against. Over time, all that heat and friction from stopping wears them down – they get thin, warp, or even develop grooves. That means your braking won't be as sharp, especially in a heavier SUV like the Mercedes-Benz M-Class or GL-Class, which needs to stop on a dime.
Symptoms That Led You Here
• Feeling a bit of a shimmy through the brake pedal or steering wheel when you hit the brakes?
• Hearing squeals, grinding, or scraping noises when slowing down?
• Taking longer to pull up than usual?
• Seeing scoring, grooves, or discolouration on the rotor surface?
• Brake pedal feeling a bit soft or spongy?
Will it pass WOF?
No way, mate. Dodgy brake rotors are a serious safety risk and will get you failed at WOF time here in NZ. Good brakes are a no-brainer for staying safe on the roads.
DIY or Workshop?
Difficulty: 6/10 (Moderate)
Estimated Time: 1-2 hours per axle (if you know your way around a toolbox)
Tools Required: Jack and jack stands, wheel nut wrench, brake caliper compression tool, socket set, torque wrench, brake cleaner, wire brush, maybe an impact wrench if things are stuck.
🛠️ Bob's "Get It Done Right" Companion Checklist
Before you get cracking, safety first! We don't want any mishaps in the driveway. So, grab yourself some safety glasses to keep the dust and debris out of your peepers, and a pair of nitrile gloves to keep those hands clean from all that brake dust. Nasty stuff, that. While you're at it, a can of brake cleaner is gold for blasting away any carbon buildup. And don't forget a bit of anti-seize caliper grease on the caliper bolts to keep them sweet for next time. Trust me, future you will thank you for it. Never get under a car supported only by a jack!
Expert Recommendation
Here at CARFIX, I always reckon you should swap out brake rotors in pairs (per axle) to keep things balanced and wear even. For your Mercedes-Benz R-Class or GL-Class, the RDA RDA7925 rotor is a top choice – good performance and built to last. Keeping your brakes in top nick is crucial, especially with these high-performance European machines.
Bob @ CARFIX is always on hand to help you work out exactly what part you need for your Mercedes-Benz. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
This rotor's made for the front of different Mercedes-Benz R-Class, M-Class, and GL-Class models, including the ML 350 BlueTEC, GL 450 CDI, and R 350 CGI. Always double-check the specs and dimensions against your VIN to be absolutely sure it's the right fit. There can be variations, even within the same model range.

---

🛠️ Bob's Pro Tip: Do the Job Right!
> GDB1642)](/parts/GDB1642) to ensure a perfect bed-in and get the job done properly first time!

🧰 What Else You'll Need:
• Safety First: Never work under a vehicle supported only by a jack. Always secure it on heavy-duty safety jack stands.
• Brake Dust Protection: Keep a pack of Nitrile Gloves handy to protect your hands from grease and dust.
• Clean and Prep: Use Brake Cleaner to clean the anti-corrosion shipping oil off the new rotors before mounting the calipers.
• Lubrication: Apply caliper grease to caliper slide pins and pad contact points to prevent squealing.