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Air Mass/Flow Sensors
By OE Match
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
This OE Match vacuum hose / brake booster line is a replacement engine bay vacuum hose for Porsche 928 models from 1987 to 1995. It is associated with the LH-Jetronic intake hose system and is designed to match the original-style fitment and function within the brake booster vacuum circuit.
Fits:
Porsche 928 S4 1987 – 1991
Porsche 928 GT 1989 – 1991
Porsche 928 GTS 1992 – 1995
Diagram ref no 12
The hose carries vacuum from the engine intake system to the brake booster vacuum circuit. It connects the left intake side cover area to the brake venturi “Y” / brake booster vacuum line arrangement, helping maintain the vacuum supply required for brake servo assistance and correct vacuum system operation.
Functions
• Connects the left intake side cover area to the brake venturi “Y” / brake booster vacuum circuit
• Carries engine vacuum through the engine bay vacuum system
• Supports brake booster / brake servo vacuum supply
• Helps maintain correct vacuum pressure in the brake assist circuit
• Supports reliable brake pedal assistance
• Replaces cracked, split, hardened, or leaking original vacuum hoses
• OE Match replacement for Porsche 928 vacuum and brake booster system repair.
Why Replace This Part?
Vacuum hoses can become hard, brittle, cracked, loose, or split due to heat, age, engine bay conditions, and long-term vacuum load. A damaged brake booster vacuum hose can cause vacuum leaks, poor brake servo assistance, rough idle, running issues, or faults in connected vacuum-controlled systems. Replacing the hose helps restore proper sealing, reliable vacuum supply, and safe brake assist function.
When to Replace This Part
• The vacuum hose is cracked, split, brittle, or perished
• The hose is loose or no longer seals correctly
• Vacuum leaks are suspected in the engine bay
• Brake pedal assistance feels reduced or inconsistent
• The brake booster / servo vacuum circuit is being repaired
• The LH-Jetronic intake hose system is being serviced
• The vehicle is undergoing Porsche 928 engine bay or braking system restoration.
Where it fits on the car
This hose fits in the engine bay vacuum system of the Porsche 928. It is associated with the LH-Jetronic intake hose system and connects the left intake side cover area to the brake venturi “Y” / brake booster vacuum circuit.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92811022001
The product you are viewing cross references to these numbers
OEMatch Air Mass/Flow Sensors — Fit, Function, Confidence
Air mass and airflow sensors measure the volume and density of intake air and provide the engine control unit with data to set fuel delivery. OEMatch supplies replacement air mass/flow sensors for Porsche models, chosen for model compatibility to help restore accurate air measurement and reliable running.
Available Types
- Hot-wire mass air flow sensors
- Integrated air mass sensors with intake air temperature sensing
- Replacement modules compatible with common Porsche ECU connectors
Understanding OEMatch Air Mass/Flow Sensors
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original air mass/flow sensors. OE (Original Equipment) refers to parts matching original specifications for the air mass/flow sensors and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM air mass/flow sensors engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. Air mass sensors detect incoming airflow and density and send this information to the ECU so it can calculate the correct air–fuel mixture; accurate measurement supports smooth running across load and temperature ranges.
Benefits Include
- Restored throttle response and smoother acceleration
- Improved fuel metering for more consistent running
- Reduced risk of drivability issues linked to incorrect air readings
Why Air Mass/Flow Sensors Wear and Fail
- Contamination from dirt, oil vapour or filter residue coating sensing elements
- Electrical faults, corrosion or damaged wiring and connectors
- Heat-related degradation of sensor electronics over time
- Air leaks downstream of the sensor causing incorrect readings
The Importance of Replacing with OEMatch Air Mass/Flow Sensors
Replacing a faulty air mass sensor restores accurate airflow measurement, which helps maintain proper fuel delivery and engine response. Timely replacement can prevent secondary faults and reduce the risk of prolonged poor running that may affect other engine systems. Select parts that match connector type and mounting to ensure straightforward fitting.
Advantages
- Direct-fit replacements made to original-spec dimensions and tolerances
- Electrical and connector compatibility for common Porsche models
- A practical supply option to support maintenance and repairs
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If you are unsure about wiring or sensor calibration, seek professional installation.
