This ATE brake master cylinder reservoir grommet is a direct-fit replacement for Porsche applications listed in the fitment table below. ATE, a division of Continental AG, has been engineering hydraulic brake systems in Germany for over a century. An OEM supplier to manufacturers like Porsche AG, Mercedes-Benz, and Volvo, ATE produces factory-level rotors, pads, and hydraulic components built to strict European standards. Known for consistent pedal feel, proper fitment, and long service life, ATE remains a trusted choice for reliable, OE-quality braking performance.

Technical Details

• Manufacturer part number: 390082
• Type: Reservoir grommet / seal at master cylinder
• OE cross reference: 901.355.929.00 (commonly listed)
• Use: Prevents seepage where the reservoir feeds the master cylinder—replace when brittle or leaking

Fitment & Compatibility

Use the fitment table below to confirm year and model details. If you’re unsure on fitment, send us your VIN and we’ll help verify it.

We’ve been doing Porsche brake work for over 20 years, and we still treat fitment questions like they matter—because they do.

Year	Make	Model	Submodel	Notes
1964	Porsche	356C
1965	Porsche	356C
1964	Porsche	356SC
1965	Porsche	356SC
1965	Porsche	911
1966	Porsche	911
1967	Porsche	911
1968	Porsche	911
1969	Porsche	911
1970	Porsche	911
1971	Porsche	911
1972	Porsche	911
1973	Porsche	911
1974	Porsche	911
1975	Porsche	911
1976	Porsche	911
1970	Porsche	914
1971	Porsche	914
1972	Porsche	914
1973	Porsche	914
1974	Porsche	914
1975	Porsche	914
1976	Porsche	914