Mirror Base for Left Hand Drive (LHD). Porsche 991 / 981 Boxster / 981 Cayman › 9917312

Door Mirror Base – Left Hand Drive (LHD)

Restore secure exterior mirror mounting with this replacement door mirror base for left-hand drive Porsche 991, 981 Boxster and Cayman models.

Fits:

• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• 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 991.2 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
• Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
• Porsche Cayman 2.7L 981 2013-16
• Porsche Cayman S / GTS 3.4L 981 2013-16

For cars with Option Codes
098 - Left Hand Drive
254 - Manually retractable exterior mirrors
255 - Manually retractable exterior mirrors with memory
256 - Manually retractable exterior mirrors with automatic dimming
257 - Manually retractable exterior mirrors with automatic dimming and memory

Diagram Ref No 1 

The mirror base connects the exterior door mirror assembly to the vehicle, providing a stable mounting point while maintaining correct mirror positioning.

Ideal for replacing a damaged, loose or broken original mounting base during mirror repairs or restoration.

What Does It Do?

The mirror base secures the exterior mirror assembly to the door, keeping it correctly positioned for rearward visibility.

It also provides the mounting arrangement that allows the mirror housing to fold manually when required.

Why Is It Important?

A secure mirror base prevents unwanted movement and maintains correct mirror alignment.

A damaged base may cause:

• Loose or vibrating door mirrors
• Incorrect mirror positioning
• Difficulty folding the mirror
• Excessive movement at the door mounting
• Poor alignment with surrounding trim

Why Do Mirror Bases Fail?

Common causes include:

• Accidental impact or collision damage
• Excessive force when folding the mirror
• Wear around mounting points
• Corrosion or deterioration of fixings
• Damage during mirror removal

When Should It Be Replaced?

Replace the mirror base if it is cracked, distorted, loose or unable to support the mirror assembly securely.

Replacement may also be necessary following accident damage or during exterior mirror refurbishment.

Installation Notes

Remove the door mirror assembly and inspect the mounting points before fitting.

Ensure the correct left or right-hand LHD base is selected. Secure the replacement using the appropriate Porsche fixing procedure and check mirror alignment after installation.

Key Features

• Replacement exterior door mirror base
• For selected Porsche 991 and 981 models
• Left-hand drive applications only
• Designed for manually folding mirror assemblies
• Provides secure exterior mirror mounting
• Replaces damaged or broken original bases
• Suitable for door mirror repairs and restoration

Door Mirror Bases

The Porsche 991 Carrera, 981 Boxster and 981 Cayman use dedicated exterior mirror mounting bases to secure the door mirrors and maintain correct positioning.

Left-hand mirror base 99173121908 and right-hand mirror base 99173122008 provide replacement mounting components for compatible left-hand drive vehicles with manually folding exterior mirrors.

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

9917312

The product you are viewing cross references to these numbers