Oil Pressure Switch - Bosch 0.15-0.45 Bar / 021-919-081B / 0-986-344-044

Oil Pressure Switch – 021-919-081B (Bosch 0-986-344-044)

The 021-919-081B is a precision-calibrated Oil Pressure Switch manufactured by Bosch (Part Number 0-986-344-044). This critical sensor monitors the internal oil pressure of your engine and triggers the warning light on your dashboard if the pressure drops below a safe operating threshold. For air-cooled and early water-cooled Volkswagens, this switch is the primary line of defense against catastrophic engine failure caused by oil pump failure, low oil levels, or internal leaks.

Bosch sensors are the industry standard for these vehicles, offering the same reliability and accuracy as the original factory equipment. This specific switch is designed with a M10x1 thread and is calibrated to trigger at a specific bar rating (typically 0.15 to 0.45 bar). Replacing a leaking or faulty switch with a genuine Bosch unit ensures that your warning system remains accurate and prevents messy oil seepage from the sensor body—a common issue with lower-quality aftermarket alternatives.

Detailed Vehicle Compatibility

Audi Fox:

• 1973, 1974, 1975, 1976, 1977, 1978

Porsche 912:

• 1976

Porsche 914:

• 1970, 1971, 1972, 1973, 1974, 1975, 1976

Porsche 924:

• 1977, 1978, 1979, 1980, 1981, 1982

VW 411:

• 1971, 1972

VW 412:

• 1973, 1974

VW Beetle (Standard):

• 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978

VW Bus:

• 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979

VW Dasher:

• 1974, 1975, 1976, 1977, 1978

VW Fastback:

• 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973

VW Karmann Ghia:

• 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974

VW Squareback:

• 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973

VW Super Beetle:

• 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979

VW Thing:

• 1973, 1974

VW Vanagon:

• 1980, 1981, 1982, 1983

Product Highlights & Features

• OEM Reliability: Manufactured by Bosch to meet original Volkswagen specifications for switching accuracy and longevity.

• Accurate Pressure Detection: Specifically calibrated for low-pressure warnings, ensuring you are alerted immediately if oil pressure reaches dangerous levels.

• Leak-Proof Construction: High-quality housing and diaphragm prevent oil from migrating through the sensor and into the electrical connector.

Technical Specifications

• Part Number: 021-919-081B

• Bosch Number: 0-986-344-044

• Thread Size: M10 x 1

• Switching Pressure: 0.15 - 0.45 Bar

Installation & Maintenance Tips

• Tapered Threads: The M10x1 thread is tapered to create a seal. Do not over-tighten the switch, as this can crack the engine case.

• Wire Insulation: Inspect the wire terminal connecting to the switch. Heat and oil often cause the wire insulation to become brittle, which can cause false flickering.

• No Sealant Required: Because of the tapered thread design, you generally do not need Teflon tape. Excessive sealer can prevent the switch from grounding properly to the engine.

0986344044

0-986-344-044

35-158

35158

80254089101

021919081B

021919081D