This ATE brake master cylinder reservoir cap (PN 390425) seals the brake fluid reservoir to keep moisture and debris out on the Porsche applications listed below. ATE, a division of Continental AG, has been engineering hydraulic brake systems in Germany fo
This ATE brake master cylinder reservoir cap (PN 390425) seals the brake fluid reservoir to keep moisture and debris out on the Porsche applications listed 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.
Use the fitment table below to confirm year and model (356/914/924/928). Always verify reservoir style and level-sensor configuration where applicable.
If youre sorting out reservoir parts, grommets, or master cylinder plumbing, send us your VIN and a quick description of whats on the car now. Weve been doing Porsche brake work for over 20 years, and we can help you avoid ordering the wrong reservoir hardware.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1956 | Porsche | 356A | ||
| 1957 | Porsche | 356A | ||
| 1958 | Porsche | 356A | ||
| 1959 | Porsche | 356A | ||
| 1960 | Porsche | 356B | ||
| 1961 | Porsche | 356B | ||
| 1962 | Porsche | 356B | ||
| 1963 | Porsche | 356B | ||
| 1964 | Porsche | 356C | ||
| 1965 | Porsche | 356C | ||
| 1964 | Porsche | 356SC | ||
| 1965 | Porsche | 356SC | ||
| 1970 | Porsche | 914 | ||
| 1971 | Porsche | 914 | ||
| 1972 | Porsche | 914 | ||
| 1973 | Porsche | 914 | ||
| 1974 | Porsche | 914 | ||
| 1975 | Porsche | 914 | ||
| 1976 | Porsche | 914 | ||
| 1977 | Porsche | 924 | ||
| 1978 | Porsche | 924 | ||
| 1979 | Porsche | 924 | ||
| 1980 | Porsche | 924 | ||
| 1981 | Porsche | 924 | ||
| 1982 | Porsche | 924 | ||
| 1978 | Porsche | 928 | ||
| 1979 | Porsche | 928 | ||
| 1980 | Porsche | 928 | ||
| 1981 | Porsche | 928 | ||
| 1982 | Porsche | 928 | ||
| 1983 | Porsche | 928 | ||
| 1984 | Porsche | 928 | ||
| 1985 | Porsche | 928 | ||
| 1986 | Porsche | 928 | ||
| 1987 | Porsche | 928 |
