Mercedes-Benz W212 W204 E-Class C-Class Brake Master Pump A2124300301 - Used Original Parts
RM 250
Condition: Used (Original)Description
Product Title
Mercedes-Benz W212 W204 E-Class C-Class Brake Master Pump A2124300301 - Used Original Parts
Diagnosis and Common Symptoms
A failing brake master cylinder on the W204 and W212 chassis typically manifests as a "spongy" or sinking brake pedal, where the pedal slowly travels to the floor while maintaining steady pressure at a stoplight. This is often caused by internal seal degradation, allowing high-pressure fluid to bypass the primary or secondary pistons. Technicians may encounter fault codes related to "Brake Pressure Sensor Plausibility" or "Pressure Sensor Signal Improbable" within the ABS/ESP module. Physical symptoms include external fluid leakage at the mounting interface between the master cylinder and the vacuum booster, which, if left unaddressed, will deteriorate the booster's internal diaphragm.
Introduction
At M.S. Motor, we prioritize hydraulic integrity by offering only Genuine Mercedes-Benz brake master pumps salvaged from low-mileage donor vehicles. Each unit undergoes a rigorous pressure-bench test to ensure that internal bypass valves and seals hold under maximum load. Choosing a Genuine used component ensures perfect bore alignment and material compatibility that aftermarket alternatives often fail to replicate.
Product Details
- Brand: Mercedes-Benz
- Model Compatibility: C-Class (W204), E-Class (W212), GLK-Class (X204)
- Part Name: Brake Master Pump / Master Cylinder
- Part Number: A2124300301
- Condition: Genuine Used (Tested Working)
- Notes: Requires professional hydraulic bleeding. Ensure the brake booster is free of residual fluid before installation to prevent future vacuum failure.
Frequently Asked Questions
Q: What symptoms indicate failure? A: The most common sign is the brake pedal "creeping" toward the floor under consistent pressure, even if no external leaks are visible. You may also notice a reduction in initial bite or an intermittent "Brake Fluid Low" warning if the rear seal is leaking into the brake booster.
Q: Does this require coding? A: No. The master cylinder is a mechanical hydraulic component and does not require software programming. However, a comprehensive brake system bleed using a Mercedes-compatible diagnostic tool to cycle the ABS/ESP valves is highly recommended to ensure all air is purged.
Q: Is this original? A: Yes. This is a Genuine Mercedes-Benz factory part. We do not stock third-party or refurbished units, as the casting quality and seal tolerances of Genuine parts are superior for safety-critical components.
Why Choose Us?
- Verified functionality through high-pressure cycle testing
- Actual photos and videos of the specific unit provided upon request
- 30-day exchange warranty for peace of mind
- Technical support from experienced technicians who understand W204/W212 braking systems
Shipping
Location: Kuala Lumpur, Malaysia Shipping: West Malaysia RM50 (Estimate) / East Malaysia RM80 (Estimate) Delivery: 1-2 working days Packaging: Secure anti-static packaging, heavy-duty shock absorption. (We send actual photos/videos of the unit and packaging before shipping)
Warranty and Return Policy
- 30-day exchange warranty from the date of receipt.
- Proof of professional installation by a qualified workshop is required for warranty claims.
- No returns if the item is opened, modified, tampered with, or damaged due to incorrect electrical wiring.
- Exchange only for confirmed internal electronic defects.
How to Order
- WhatsApp us to confirm compatibility with your specific VIN.
- Send your chassis number or a clear photo of your old unit label.
- Confirm order details and stock availability.
- Receive actual product photos and diagnostic test confirmation.
- Make payment via bank transfer.
- Item is shipped immediately with tracking details provided.
Contact Us
William – https://wa.me/60102992988 Lok – https://wa.me/60177720143
Price Notice
Price is estimated only. Actual price depends on current stock levels, specific part number revisions, and unit condition. Please WhatsApp us for a formal quote.
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