Does this master cylinder for 1 Series come with the fluid reservoir?

Yes, it is a complete assembly including the reservoir, cap, and grommets.

My brake pedal slowly sinks to the floor; will this master cylinder fix it?

Yes, an internal leak in the master cylinder is a primary cause of a sinking pedal.

Do I need to bench-bleed this master cylinder before installing it in my 1 Series?

Yes, bench bleeding is essential to remove air and ensure a firm brake pedal.

What warranty coverage is provided on this master cylinder?

We offer a one-year warranty covering any manufacturing defects or premature failure of this component.

How quickly can I expect delivery of this master cylinder for my 1 Series?

Orders typically ship within 24 hours and standard delivery takes between 3 to 5 business days.

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Part

Master Cylinder

Compatible with BMW 1 Series

✓ Fits 1 Verified BMW 1 Series Variants

1 Series 118d Sport Line

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Product Description

Maintain full hydraulic pressure to your brakes with this new master cylinder for 1 Series. When you press the brake pedal, this cylinder converts that force into hydraulic pressure for the calipers or wheel cylinders. The smooth bore and high-quality seals ensure a perfect seal and consistent pedal feel. Replace a failing unit in your 1 Series to eliminate a spongy or sinking pedal. Ensure the safety of your 1 Series with this essential braking system component.

Key Features

Precision-machined aluminum or cast-iron body for durability
Bore size matched perfectly to OEM specifications for your 1 Series
Includes a new reservoir and cap with fluid level sensor
Internal surfaces are super-finished for smooth piston travel
100% factory tested for pressure retention and leak-free performance

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