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Vacuum Unit
By OE Match
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
This a high-quality replacement reservoir stores vacuum created by the engine or vacuum pump, providing a steady supply of vacuum to systems such as brake boosters, emissions control, and actuators even under engine load or varying vacuum conditions. It’s moulded from durable plastic with designed internal volume, mounting bosses, and port locations matching the original Porsche part (replaces 99311014002 / 99311014003 / 0PB129093).
Fits:
Porsche 993 Carrera 1994-98 (Engine: 6405 / 6406 / 6407 / 6408)
Porsche 993 Turbo 3.6L 1994-98 (Engine: 6460)
Porsche 996 Carrera 1998-05 (Engine: 9601 / 9602 / 9604 / 9603)
Porsche 996 Turbo 2001-05
Porsche 996 GT3 / GT3 RS 1999-05 (Engine: 9676 / 9679)
Porsche 986 Boxster 2.5L 1997-99 (Engine: 9620)
Porsche 986 Boxster 2.7L / S 3.2L 2000-02 (Engine: 9621 / 9622 / 9623 / 9624)
Porsche 991 GT3 2014-21
Diagram ref no 6
Engineered to OE standards, this unit replicates the original shape, mounting points, port alignment, and internal volume. Its material resists heat, oil vapor, and pressure cycling to provide reliable vacuum buffering over long-term use.
Over time, the vacuum reservoir can crack, leak, or lose internal sealing, leading to:
• Reduced braking assistance
• Malfunction of intake or exhaust actuators
• Check-engine lights caused by vacuum faults
• Rough idling or loss of power under load
Replacing the vacuum reservoir restores full vacuum stability and ensures proper operation of all connected systems. This is especially important when diagnosing brake booster failures, emissions issues, or vacuum leak codes.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0PB129093
The product you are viewing cross references to these numbers
OEMatch Vacuum Unit — Fit, Function, Confidence
Vacuum units control intake flaps and actuators to regulate airflow and support smooth idling, efficient combustion and responsive throttle behaviour in Porsche models. OEMatch provides a wide selection of replacement vacuum unit parts and cross-references prepared for Porsche applications to help retain correct intake control and overall driveability.
Available Types
- Replacement housings and mounting gaskets
- Diaphragms, seals and valve assemblies
- Actuator assemblies and linkage components
Understanding OEMatch Vacuum Unit
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original vacuum unit.
OE (Original Equipment) refers to parts matching original specifications for the vacuum unit and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM vacuum unit replacements engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
In-service, these assemblies manage vacuum pressure to move intake flaps, modulate actuator positions and support emissions control; faults commonly present as erratic flap movement, rough idle or diagnostic fault codes.
Benefits Include
- Restored intake flap control and improved throttle response
- More consistent idle and low-speed torque
- Improved emissions regulation and smoother transitions under load
Why Vacuum Unit Wear and Fail
- Vacuum leaks from cracked housings, brittle hoses or failed seals
- Internal diaphragm wear reducing vacuum control efficiency
- Heat damage or deformation from prolonged engine temperatures
- Contamination or corrosion affecting valves and ports
The Importance of Replacing with OEMatch Vacuum Unit
A faulty vacuum unit can upset the air–fuel balance, trigger engine management faults and reduce driveability. Replacing worn or damaged units restores reliable vacuum regulation for intake actuators, helps prevent fault codes and supports consistent engine response across operating conditions, preserving performance and drivability for Porsche models.
Advantages
- Made to original-spec dimensions and tolerances for fit and clearance
- Broad cross-referencing to match common Porsche part numbers and applications
- Selected for Porsche models as a practical alternative when originals are unavailable
