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Vacuum Line. Porsche 987 Boxster / Cayman 2005-08 - 98735557503
98735557503
Vehicle Group
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Information
Vacuum Line.
Ensure optimum braking assist performance on your Porsche with this genuine OEM vacuum line. Designed for 987-series vehicles (Boxster/Cayman 2005-08), this line connects the vacuum source to the brake assist or under-body vacuum system, ensuring proper vacuum supply, consistent brake pedal feel, and reliable operation.
Fits:
Diagram Ref No 14
What This Product Does:
Symptoms Of Wear Or When To Replace:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98735557503
The product you are viewing cross references to these numbers
Ensure optimum braking assist performance on your Porsche with this genuine OEM vacuum line. Designed for 987-series vehicles (Boxster/Cayman 2005-08), this line connects the vacuum source to the brake assist or under-body vacuum system, ensuring proper vacuum supply, consistent brake pedal feel, and reliable operation.
Fits:
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Diagram Ref No 14
What This Product Does:
- This vacuum line carries engine or brake-servo vacuum (negative pressure) from the vacuum source (e.g., intake manifold or dedicated vacuum pump) to the brake master cylinder/servo or rear axle vacuum assist components.
- The line ensures that the brake assist system (and possibly other vacuum-dependent systems) receive the correct vacuum pressure so that the driver has proper brake pedal feel, braking power assist, and overall vacuum system integrity.
- A proper vacuum line prevents loss of assist, ensures consistent braking effort, and avoids vacuum leaks that could affect engine operation or brake performance.
Symptoms Of Wear Or When To Replace:
- Reduced brake assist: The brake pedal may feel harder than normal, or the braking response may require more effort — indicating the vacuum feed is compromised.
- Hissing or vacuum leak noise: A damaged or cracked vacuum line may emit a hissing sound under load as vacuum is lost.
- Visible damage, cracking, brittleness, kinks or splits in the hose/line, especially under the vehicle or near mounting points.
- Check engine or brake system warning lights: A vacuum leak may trigger fault codes related to braking or vacuum-supply detection.
- Age-related deterioration: Rubber or plastic vacuum hoses degrade over time (heat, road debris, chemical exposure) and for 987-series vehicles these lines are good candidates for preventive replacement.
- Brake safety & performance: A secure, intact vacuum line is critical to ensuring brake assist works properly — directly impacting stopping distances and driver safety.
- System reliability: A genuine part ensures the correct hose diameter, material and routing — preventing future leaks, vacuum loss and other associated issues.
- Prevents further damage: A failed vacuum line may cause compensatory wear on other brake components (master cylinder, servo) or affect engine vacuum systems — replacing proactively prevents secondary damage.
- OEM fitment: Using the correct Porsche part (#98735557503) keeps the system as engineered and avoids mismatches which could reduce reliability or cause fit/clearance issues.
- Maintains vehicle value & integrity: For Porsche vehicles, even small parts like vacuum lines matter for overall build quality, service history and operational confidence.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98735557503
98735557503
98735557501
98735557502
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Price: €124.31
Orderable
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Vehicle Group
- Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Information
Brake line, Rear.
Fits:
Porsche 991 Turbo 2014-18
Porsche 991 R / GT3 / GTS RS 2014-18
*** NOT for GT2 RS 3.8L 2014-18
*** NOT for cars with Ceramic Brakes
Click 'Zoom in' for large parts diagram.
Diagram ref no
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99135558
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Fits:
Porsche 991 Turbo 2014-18
Porsche 991 R / GT3 / GTS RS 2014-18
*** NOT for GT2 RS 3.8L 2014-18
*** NOT for cars with Ceramic Brakes
Click 'Zoom in' for large parts diagram.
Diagram ref no
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Vehicle Group
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp)
- Porsche Boxster 718 2.0L PDK (300 Bhp)
- Porsche Boxster S 718 2.5L Manual (350 Bhp)
- Porsche Boxster S 718 2.5L PDK (350 Bhp)
- Porsche Boxster T 718 2.0L Manual (300 Bhp)
- Porsche Boxster T 718 2.0L PDK (300 Bhp)
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp)
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp)
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp)
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp)
- Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300Bhp)
- Porsche Cayman 718 2.0L PDK (300Bhp)
- Porsche Cayman S 718 2.5L Manual (350Bhp)
- Porsche Cayman S 718 2.5L PDK (350Bhp)
- Porsche Cayman T 718 2.0L Manual (300Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
Information
Caliper brake line, Front.
Fits:
For cars WITHOUT ceramic brake (PCCB)
Porsche 991.1 C2 / C4 2012 - 2016
Porsche 991.2 C2 / C4 2017 - 2019
Porsche 981 Boxster 2012 - 2016
Porsche 982 (718) Boxster 2017 - 2021
Porsche 981 Cayman 2014 - 2016
Porsche 982 (718) Cayman 2017 - 2021
Diagram ref no 22
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99261177
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Fits:
For cars WITHOUT ceramic brake (PCCB)
Porsche 991.1 C2 / C4 2012 - 2016
Porsche 991.2 C2 / C4 2017 - 2019
Porsche 981 Boxster 2012 - 2016
Porsche 982 (718) Boxster 2017 - 2021
Porsche 981 Cayman 2014 - 2016
Porsche 982 (718) Cayman 2017 - 2021
Diagram ref no 22
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Prices from: €42.26
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Information
Hydra tec lubricant for maintenance work and protection Textar
Available in 75ml Tube or 5ml Sachet
The Advantages of Hydra Tec:
- Facilitates the installation of hydraulic brake components
- Tested compatibility with commercially available braking fluids (DOT3, DOT4, DOT4LV, DOT5.1)
- Free of mineral oils and compatible with EPDM rubber
- In addition, running surfaces are protected against corrosion
Hydra Tec is suitable for lubricating:
- Cylinder running surfaces
- Pistons
- Sealing elements
Application:
Apply a thin layer of Hydra Tec on the marked sections.
Note:
Hydra Tec should be applied thinly and evenly.
Never use mineral oils or greases as substitutes.
Do not apply the product on friction surfaces of brake pads or brake discs.
Find out about Textar product verification here
Prices from: €0.49