Electronic Damper Control

Adaptive Suspension Hose.

Fits:
Porsche 991.2 Carrera MKII 2017>>2019
Cars With Option Codes:
474 - Front-Axle Lift Function

Porsche 991 Turbo / GT2 RS MKII 2016>>2020
Cars With Option Codes:
D97 - 6-Cylinder Turbo 3.8L 515 KW GT2-RS
474 - Front-Axle Lift Function

Diagram Ref No 15

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9P1411813

The product you are viewing cross references to these numbers

Electronic damping (PASM) delete kit.

Fits
Porsche 991.1 - all models
Porsche 991.2 - all models

Front suspension headlamp levelling sensor.
This Headlight Level Sensor is a replacement electronic sensor engineered to replicate the original Porsche ride height/level sensing component used in the headlight levelling system. It is designed for direct installation in compatible Porsche 911 (991), Boxster (982) and Cayman (982) models to work with automatic headlight levelling systems.

Fits:
Porsche 718 Boxster - 2017 Onwards 
Porsche 718 Cayman - 2017 Onwards 
Porsche 991.1 / 991.2 - 2012 to 2019
Porsche 991 turbo - 2017 to 2020

Diagram ref no 17

The headlight level sensor detects changes in the vehicle’s suspension height and sends accurate position data to the headlight control module. This enables the automatic headlight levelling function, allowing the headlights to adjust their beam angle based on load and vehicle pitch - helping maintain optimal illumination and preventing glare to other road users.

Mounted to the front suspension/ride height linkage, the sensor reads positional changes and converts them into electronic signals. The control module uses this data to raise or lower the headlight beam dynamically, ensuring consistent light alignment regardless of load, acceleration, or inclination. It supports safer night driving by keeping beams properly aligned.

A faulty headlight level sensor can lead to inconsistent beam aim, poor night visibility, dashboard warnings, or disabled levelling functions. Replacing a worn or failed sensor restores correct feedback to the headlight control system, maintaining proper beam alignment and ensuring safe, predictable nighttime lighting performance.

When to replace:
• Headlights won’t auto-adjust when load changes
• Levelling warning or fault codes on the instrument cluster
• Beam angle appears too high or low under load
• After suspension work / sensor linkage removal
• As preventive maintenance when replacing related sensors or heads

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99134302101

The product you are viewing cross references to these numbers

Front suspension headlamp levelling sensor.



Fits:
Porsche 718 Boxster - 2017 Onwards 
Porsche 718 Cayman - 2017 Onwards 

Porsche 991.1 / 991.2 - 2012 to 2019
Porsche 991 turbo - 2017 to 2020

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99134302101

The product you are viewing cross references to these numbers

Rear Axle Level Sensor.
Restore accurate rear suspension position monitoring and correct operation of associated vehicle systems with this Porsche Rear Axle Level Sensor, part number 99133302104. Designed for compatible Porsche applications, the level sensor monitors the position or movement of the rear axle/suspension relative to the vehicle body and supplies this information to the relevant electronic control systems.  

Fits:

• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• 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 Speedster 4.0L (510Bhp) 2019
• 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  

Cars With Option Codes:
029 - Standard Chassis
601 - Xenon Lighting System
603 - Xenon Plus Dynamic Cornering Light
030 - Sports Suspension
031 - Sports Chassis With PASM And PDCC
352 - Electronic Damper Control For PASM And PDCC
475 - "PASM" Electronic Damper Control
477 - PASM W/O Lowering

Diagram Ref No 11

The sensor typically operates through a mechanical linkage connected to the suspension. As suspension height changes due to vehicle load, acceleration, braking or road conditions, the linkage moves the sensor through its operating range. The resulting signal allows applicable control modules to determine the vehicle's rear ride-height position.

Depending on vehicle specification, this information may be used by systems such as automatic headlamp levelling and suspension/ride-height control. Accurate level information allows these systems to compensate for changes in vehicle attitude and load.

Because of its location underneath the vehicle, the sensor and linkage are exposed to water, dirt, road salt, corrosion and physical movement. Over time, the linkage can seize or break, electrical connections can deteriorate, or the sensor itself can develop inaccurate or intermittent readings.

What This Product Does:

• Monitors rear suspension/axle position relative to the vehicle body.
• Detects changes in vehicle ride height.
• Converts suspension movement into an electrical signal.
• Sends position information to applicable vehicle control systems.
• Helps compensate for changes caused by passenger or luggage loads.
• Can support automatic headlamp levelling where equipped.
• Can provide information for applicable suspension control systems.
• Helps the vehicle determine changes in body attitude.
• Works through a mechanical linkage connected to the suspension.
• Supports correct operation of systems dependent on ride-height information.
• Replaces a damaged, seized, inaccurate or failed rear level sensor.
• Restores reliable rear axle position feedback when sensor failure is the cause.  

Symptoms Of Wear Or Failure:

• Suspension-related warning message.
• Headlamp levelling warning or fault.
• Automatic headlamp levelling not operating correctly.
• Headlamps pointing unusually high or low.
• Headlamp aim failing to compensate for vehicle load.
• Suspension or chassis warning light.
• Ride-height system behaving unexpectedly where applicable.
• Incorrect suspension-height information during diagnostics.
• Implausible level-sensor readings.
• Intermittent level-sensor signal.
• Sensor-related diagnostic fault codes.
• Broken or disconnected sensor linkage.
• Seized linkage joints.
• Bent linkage arm.
• Corrosion around the sensor or linkage.
• Damaged electrical connector.
• Damaged wiring near the rear suspension.
• Physical damage caused by road debris or previous suspension work.  

Why Replacement Matters:

• Modern Porsche systems rely on accurate sensor information to make automatic adjustments. If the rear axle level sensor sends an incorrect signal, the relevant control module may receive inaccurate information about the vehicle's suspension position.
• For vehicles equipped with automatic headlamp levelling, this can affect headlamp aim. A heavily loaded rear axle can change the angle of the vehicle body, potentially causing the headlights to point higher than intended. The levelling system uses suspension-position information to compensate for these changes.
• A faulty sensor can therefore contribute to headlights being aimed too high or too low. Incorrectly aimed headlights may reduce useful road illumination or create excessive glare for other road users.
• Where the sensor is also used by suspension or chassis systems, inaccurate ride-height information can interfere with the correct operation or diagnosis of those systems.
• Physical linkage problems are particularly important. A seized or broken linkage can prevent the sensor from following suspension movement even if the sensor electronics remain functional.
• Replacing a faulty Porsche Rear Axle Level Sensor 99133302104 helps restore reliable position feedback and allows associated systems to operate using accurate suspension-height information.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99133302104

The product you are viewing cross references to these numbers

Rear Axle Level Sensor.

Restore accurate rear suspension position monitoring and dependable operation of associated vehicle systems with this OE Match Rear Axle Level Sensor. Designed for compatible Porsche applications, this sensor monitors the position of the rear axle and suspension relative to the vehicle body.

Fits:

• Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
• Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
• Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
• Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
• Porsche 991.1 R 4.0L (500 Bhp) 2016
• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• 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 Speedster 4.0L (510Bhp) 2019
• 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  

Cars With Option Codes:
029 - Standard Chassis
601 - Xenon Lighting System
603 - Xenon Plus Dynamic Cornering Light
030 - Sports Suspension
031 - Sports Chassis With PASM And PDCC
352 - Electronic Damper Control For PASM And PDCC
475 - "PASM" Electronic Damper Control
477 - PASM W/O Lowering

Diagram Ref No 11

The sensor typically operates through a small mechanical linkage attached to the suspension. As the suspension moves or the vehicle's ride height changes due to passengers, luggage, acceleration, braking or road conditions, the linkage moves the sensor through its operating range. The sensor converts this movement into an electrical signal that can be used by the vehicle's relevant control systems.

Depending on vehicle specification, rear axle level information may be used by systems including automatic headlamp levelling and electronically controlled suspension functions. Accurate position information helps these systems respond correctly to changes in vehicle load and body attitude.

Mounted underneath the vehicle, the sensor and linkage are exposed to water, dirt, road salt, corrosion and continual suspension movement. Linkages can seize or break, while the sensor, wiring or electrical connector may eventually develop faults.

This OE Match Rear Axle Level Sensor provides a high-quality replacement for a damaged, seized, inaccurate or failed original sensor.

What This Product Does:

• Monitors rear suspension/axle position relative to the vehicle body.
• Detects changes in vehicle ride height.
• Converts suspension movement into an electrical signal.
• Sends position information to applicable vehicle control systems.
• Helps compensate for changes caused by passenger or luggage loads.
• Can support automatic headlamp levelling where equipped.
• Can provide information for applicable suspension control systems.
• Helps the vehicle determine changes in body attitude.
• Works through a mechanical linkage connected to the suspension.
• Supports correct operation of systems dependent on ride-height information.
• Replaces a damaged, seized, inaccurate or failed rear level sensor.
• Restores reliable rear axle position feedback when sensor failure is the cause.  

Symptoms Of Wear Or Failure:

• Suspension-related warning message.
• Headlamp levelling warning or fault.
• Automatic headlamp levelling not operating correctly.
• Headlamps pointing unusually high or low.
• Headlamp aim failing to compensate for vehicle load.
• Suspension or chassis warning light.
• Ride-height system behaving unexpectedly where applicable.
• Incorrect suspension-height information during diagnostics.
• Implausible level-sensor readings.
• Intermittent level-sensor signal.
• Sensor-related diagnostic fault codes.
• Broken or disconnected sensor linkage.
• Seized linkage joints.
• Bent linkage arm.
• Corrosion around the sensor or linkage.
• Damaged electrical connector.
• Damaged wiring near the rear suspension.
• Physical damage caused by road debris or previous suspension work.  

Why Replacement Matters:

• Modern Porsche systems rely on accurate sensor information to make automatic adjustments. If the rear axle level sensor sends an incorrect signal, the relevant control module may receive inaccurate information about the vehicle's suspension position.
• For vehicles equipped with automatic headlamp levelling, this can affect headlamp aim. A heavily loaded rear axle can change the angle of the vehicle body, potentially causing the headlights to point higher than intended. The levelling system uses suspension-position information to compensate for these changes.
• A faulty sensor can therefore contribute to headlights being aimed too high or too low. Incorrectly aimed headlights may reduce useful road illumination or create excessive glare for other road users.
• Where the sensor is also used by suspension or chassis systems, inaccurate ride-height information can interfere with the correct operation or diagnosis of those systems.
• Physical linkage problems are particularly important. A seized or broken linkage can prevent the sensor from following suspension movement even if the sensor electronics remain functional.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99133302104

The product you are viewing cross references to these numbers

Rear Axle Level Sensor.
The Porsche Rear Axle Level Sensor is a genuine suspension monitoring component designed to measure rear suspension position and vehicle ride height. Engineered to Porsche's exact specifications for accuracy, reliability and durability, this sensor provides critical data to the vehicle's suspension, chassis control and headlamp levelling systems.  

Fits:

• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
• 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 

 
Diagram Ref No 18

Mounted to the rear suspension assembly, the level sensor continuously monitors suspension movement and transmits real-time ride height information to the vehicle's control modules. This data allows systems such as air suspension, adaptive chassis control and automatic headlamp levelling to make precise adjustments, ensuring optimum vehicle balance, handling stability and driving comfort.  

What This Product Does:

• Monitors rear axle ride height and suspension position.
• Provides real-time data to chassis and suspension control systems.
• Supports air suspension and ride height adjustment functions.
• Assists automatic vehicle levelling systems.
• Provides input for automatic headlamp levelling.
• Helps maintain correct vehicle stance and balance.
• Contributes to ride comfort and handling stability.
• Supports the operation of advanced electronic suspension systems.

Symptoms Of Wear Or Failure:

• Suspension warning lights illuminated on the dashboard.
• Air suspension fault messages.
• Uneven vehicle ride height.
• Rear of the vehicle sitting too high or too low.
• Vehicle leaning to one side.
• Incorrect headlamp alignment.
• Suspension failing to adjust ride height correctly.
• Fault codes relating to level sensors or chassis systems.
• Reduced ride comfort and handling performance.
• Physical damage or corrosion of the sensor linkage.

Why Replacement Matters:

• Rear axle level sensors operate in a harsh environment where they are exposed to water, dirt, road salt, vibration and constant suspension movement. Over time, the sensor mechanism, linkage arms and electrical connections can become worn, corroded or damaged, resulting in inaccurate ride height measurements.
• A faulty level sensor can prevent the suspension system from maintaining the correct vehicle height and balance, affecting handling, ride quality and tyre wear. It may also compromise automatic headlamp levelling and place additional strain on air suspension compressors and control components.
• Replacing a worn or defective rear axle level sensor restores accurate ride height monitoring and ensures proper operation of the vehicle's suspension and levelling systems. A genuine Porsche replacement provides precise calibration, factory-correct fitment and long-term reliability, helping preserve the comfort, safety and performance characteristics engineered into your Porsche.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99133303

The product you are viewing cross references to these numbers

Rear Axle Level Sensor.
The OE MATCH Rear Axle Level Sensor is a genuine suspension monitoring component designed to measure rear suspension position and vehicle ride height. This sensor provides critical data to the vehicle's suspension, chassis control and headlamp levelling systems.  

Fits:

• Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
• Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
• 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 

 
Diagram Ref No 18

Mounted to the rear suspension assembly, the level sensor continuously monitors suspension movement and transmits real-time ride height information to the vehicle's control modules. This data allows systems such as air suspension, adaptive chassis control and automatic headlamp levelling to make precise adjustments, ensuring optimum vehicle balance, handling stability and driving comfort.  

What This Product Does:

• Monitors rear axle ride height and suspension position.
• Provides real-time data to chassis and suspension control systems.
• Supports air suspension and ride height adjustment functions.
• Assists automatic vehicle levelling systems.
• Provides input for automatic headlamp levelling.
• Helps maintain correct vehicle stance and balance.
• Contributes to ride comfort and handling stability.
• Supports the operation of advanced electronic suspension systems.

Symptoms Of Wear Or Failure:

• Suspension warning lights illuminated on the dashboard.
• Air suspension fault messages.
• Uneven vehicle ride height.
• Rear of the vehicle sitting too high or too low.
• Vehicle leaning to one side.
• Incorrect headlamp alignment.
• Suspension failing to adjust ride height correctly.
• Fault codes relating to level sensors or chassis systems.
• Reduced ride comfort and handling performance.
• Physical damage or corrosion of the sensor linkage.

Why Replacement Matters:

• Rear axle level sensors operate in a harsh environment where they are exposed to water, dirt, road salt, vibration and constant suspension movement. Over time, the sensor mechanism, linkage arms and electrical connections can become worn, corroded or damaged, resulting in inaccurate ride height measurements.
• A faulty level sensor can prevent the suspension system from maintaining the correct vehicle height and balance, affecting handling, ride quality and tyre wear. It may also compromise automatic headlamp levelling and place additional strain on air suspension compressors and control components.
• Replacing a worn or defective rear axle level sensor restores accurate ride height monitoring and ensures proper operation of the vehicle's suspension and levelling systems.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99133303

The product you are viewing cross references to these numbers

Suspension air compressor. Porsche 991 2014-2021

Fits:
Cars with Air Suspension PR474

• Porsche 991 Carrera C2 3.4L (350Bhp)
• Porsche 991 Carrera C2S 3.8L (400Bhp)
• Porsche 991 Carrera C4 3.4L (350Bhp)
• Porsche 991 Carrera C4S 3.8L (400Bhp)
• Porsche 991 Turbo 3.8L (520bhp)
• Porsche 991 Turbo S 3.8L (560Bhp)
• Porsche 991 GT3 3.8L (475Bhp)
• Porsche 991 GT3 RS 4.0L (500Bhp)
• Porsche 991 Carrera 2 3.0L (370 Bhp)
• Porsche 991 Carrera 2S 3.0L (420 Bhp)
• Porsche 991 Carrera 4 3.0L (370 Bhp)
• Porsche 991 Carrera 4S 3.0L (420 Bhp)
• Porsche 991 Cabriolet 2 3.0L (370 Bhp)
• Porsche 991 Cabriolet 2S 3.0L (420 Bhp)
• Porsche 991 Cabriolet 4 3.0L (370 Bhp)
• Porsche 991 Cabriolet 4S 3.0L (420 Bhp)
• Porsche 991 Targa 4 3.0L (370 Bhp)
• Porsche 991 Targa 4S 3.0L (420 Bhp)
• Porsche 991 Turbo Coupe 3.8L (540 Bhp)
• Porsche 991 Turbo S Coupe 3.8L (580 Bhp)
• Porsche 991 Turbo Cabriolet 3.8L (540 Bhp)
• Porsche 991 Turbo S Cabriolet 3.8L (580 Bhp)
• Porsche 991 R 4.0L (500 Bhp)
• Porsche 991 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp)
• Porsche 991 GT2 RS 3.8L PDK (700 bhp)
• Porsche 991 Speedster

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99134126399

The product you are viewing cross references to these numbers

WABCO OES air suspension compressor.

Fits:
Cars with Air Suspension
Porsche 991.1 GT3 / GT3 RS
Porsche 991.1 R 
Porsche 991.2 GT3 / GT3 RS
Porsche 991.2 Speedster

Arnott has teamed up directly with WABCO to supply you with the same OE part at a fraction of the dealer cost. These compressors are made by the same supplier used by the OE. Arnott now has the one-stop solution for those who prefer the original equipment. This same compressor assembly will cost you a small fortune at your local dealership!

This is just the compressor and dryer assembly. You may have to reuse some of your OEM hardware during the installation. Available Detailed Installation Manual walks you through the installation step-by-step.

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Related, superseded, cross reference or alternative numbers for comparison.

99134126399

The product you are viewing cross references to these numbers