MEYLE Diaphragm Diaphragm Brake Cylinder (034 042 0003) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Diameter [inch]: 30" Inch, Material: 44 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 000 423 12 86, 016.247-00, 016.247-00A, 02.130.7117.060 and 20 more. Matching these numbers confirms a like-for-like replacement with no loss of function. MEYLE is a recognised supplier of automotive braking components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.

MEYLE, founded in 1958 in Hamburg, Germany, is an independent aftermarket specialist known for engineering improved replacement parts. MEYLE offers over 24,000 parts across steering, suspension, braking, drivetrain, cooling, and filtration systems. Their MEYLE-HD line features redesigned parts that address known OE weaknesses, often outperforming the original. With ISO 9001 and IATF 16949 certifications and a commitment to solving recurring vehicle problems, MEYLE is the preferred choice for workshops seeking parts that last longer than the originals.