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Porsche > 356 (1950-1965) > Interior & Accessories >

Side Sill Trims

Side Sill Trims

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DISPLAYING 1 to 5 (of 5 products)
Aluminium Door Sill Threshold kit. Porsche 356 Speedster / Roadster 1950 - 1965 - 64455111700, 64455111900, 64455112000 - 644.551.117.00
2
Aluminium Door Sill Threshold kit. Porsche 356 Speedster / Roadster 1950 - 1965
64455111KIT
Product Information
Product Information
Aluminium Door Sill Threshold set.
The kit includes four precision-formed aluminium strips that fit directly into the door sill areas on both sides of your Porsche 356. These threshold trims mount over the carpet at the lower door openings, offering a classic polished look that matches the vehicle’s original styling.

Fits:
Porsche 356 Speedster / Roadster 1950 - 1965

Diagram ref no 53  and 59

This kit includes two wide and two narrow aluminium strips to cover both door entry sills on your vehicle.

Threshold kit includes:
- 2 Wide aluminium strips (OE ref no 64455111700)
- 2 Narrow aluminium strips (OE ref no 64455111900 / 64455112000)

The aluminium door sill threshold strips serve both a protective and aesthetic function. They shield the painted door sill and interior carpet edge from scratches, shoe marks, and general wear during vehicle entry and exit. In addition, the metal finish restores the classic look and feel of a well-preserved or restored Porsche 356, providing a high-quality finishing touch to the cabin threshold.

Function
•  Protects the door sill paint and carpet edges from abrasion.
•  Provides a classic polished trim finish consistent with original Porsche design.
•  Fits flush with the sill area for clean, restoration-ready aesthetics.
•  Durable aluminium construction resists wear and moisture exposure common in classic cars.

Door sill areas on classic Porsche 356 cars receive heavy foot traffic, which can easily wear away paint, rust bare metal, and fray the carpet edge. Without proper threshold protection, dirt and moisture can also lead to corrosion over time. Installing this aluminium sill threshold kit restores classic styling, protects vulnerable surfaces, and preserves interior value - especially important for restorations or classic-car presentations.

Replace your door sill trims if:
•  The existing aluminium strips are worn, dented, or corroded
•  Paint or carpet edges show scratches and abrasion
•  You’re performing an interior restoration or detailing refresh
•  Moisture has caused rust or surface degradation around the sill area

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

64455111KIT
64455111700
64455111900
64455112000

The product you are viewing cross references to these numbers
Door threshold aluminium carpet strip. Porsche 356 A/B/C - 64455111700, 64455111800
2
Door threshold aluminium carpet strip. Porsche 356 A/B/C
Special Order item
64455111700
Product Information
Product Information
Door threshold aluminum carpet strip retainers.

Fits Left or Right side 

porsche

Fits:
Porsche 356 A / 356 B / 356 C

Click 'Zoom in' for large parts diagram.
Diagram ref no 24



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

64455111700
64455111700
64455111800

The product you are viewing cross references to these numbers
Door threshold kit. Porsche 356 1950-65 - 64455111700, 64455111500, 64455111600, 64455111800, 64455112000, 64455111900
2
Door threshold kit. Porsche 356 1950-65
SMC55111700
Product Information
Product Information
This kit for all 356's, Speedsters and Roadsters includes the wide aluminium strip, narrow aluminium strip, threshold rubber and screw set. One kit includes parts needed for both doors.

oematch

Threshold kit includes:
- 2 Wide aluminium strips (64455111700)
- 2 Threshold rubbers (64455111500 / 64455111600)
- 2 Narrow aluminium strips (64455111900 / 64455112000)

Fits:
Porsche 356 Speedster / Roadster 1950-1965

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

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

SMC55111700
64455111700
64455111500
64455111600
64455111800
64455112000
64455111900

The product you are viewing cross references to these numbers
Door threshold side sills protectors black rubber. Porsche 356 A/B/C - 64455111500, 64455111600, 1689804200, 1689804200 - 644.551.115.00, 1689804200
2
Door threshold side sills protectors black rubber. Porsche 356 A/B/C
64455111500/1
Product Information
Product Information
Door threshold side sills protectors black rubber.
Fits Left or Right Side

oematch

Fits:
Porsche 356 A / 356 B / 356 C

Click 'Zoom in' for large parts diagram.
Diagram ref no 27

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

64455111500
64455111500
64455111600
1689804200
1689804200

The product you are viewing cross references to these numbers
Plastic Expansion Rivet for Door Sill Step Plate. Porsche 911 1965-73 / 914 1970-76 - 99959155040, 99959152640
2
Plastic Expansion Rivet for Door Sill Step Plate. Porsche 911 1965-73 / 914 1970-76
Special Order item
99959155040
Product Information
Product Information
Plastic Expansion Rivet for Door Sill Step Plate
This Porsche Genuine OE Expansion Rivet is a factory plastic push-type fastening clip designed for securing the door sill step plate / threshold trim. Commonly referred to as a plastic rivet, expanding rivet, or trim clip, this component is widely used in classic Porsche models for fastening interior and exterior trim panels.
Sold individually, Typically multiple required per vehicle

Fits:
Porsche 911 1965 - 1973
Porsche 914 1970 - 1976

Diagram ref no 29

It replaces earlier reference 99959152640 and is supplied individually.
This is a multi-use trim fastening clip, also used in other interior applications depending on model and configuration.

This expansion rivet is inserted into pre-drilled holes and expands when pushed into place, locking the door sill plate or trim strip securely to the bodywork.

It provides a firm hold while allowing easy installation and removal, making it ideal for trim components that may require periodic servicing or replacement.

Functions & Technical Role
•  Trim fastening: Secures door sill step plates and threshold trims
•  Expansion locking design: Expands inside mounting holes for secure retention
•  Vibration resistance: Prevents movement, rattling, or loosening of trim
•  Non-corrosive material: Plastic construction resists rust and environmental damage
•  OEM precision: Designed to Porsche specifications for correct fit and grip

Fitment / Position on car
•  Fitting position: Interior / body trim
•  Location: Door sill step plates (threshold trims)  / Rocker panel trim strips /  Interior trim panels (various applications)

Trim clips are often overlooked but are critical for maintaining proper fit and finish. Over time, they can:
•  Become brittle or break
•  Lose tension and fail to hold trim securely
•  Be lost during removal or restoration work

A worn or missing rivet can lead to:
•  Loose or rattling sill trims
•  Poor alignment of interior panels
•  Reduced overall finish quality

Replacing with genuine Porsche OE rivets ensures secure trim mounting and preserves the original appearance of the vehicle.

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

99959155040
99959155040
99959152640

The product you are viewing cross references to these numbers
DISPLAYING 1 to 5 (of 5 products)
Also found on these pages
About Side Sill Trims

Porsche Side Sill & Step Trims | Precision Interior & Exterior Finishing Components

Side sill and step trims are the finishing touch that bridge style and protection in your Porsche’s design. These trims protect the lower door openings and sill areas from scuffs, scratches, and dirt while adding a polished, premium appearance to your interior and entryway. Over time, constant use and exposure to the elements can cause damage or fading — making replacement essential for maintaining your Porsche’s visual and structural integrity.

At Design911, we supply high-quality side sill and step trims crafted to meet or exceed original specifications. Manufactured from durable materials such as aluminium, stainless steel, or carbon fibre, our trims ensure perfect fitment, long-term protection, and an elegant aesthetic.

Whether you’re restoring a classic 911 or upgrading a modern Cayenne, our sill trims combine functional protection with refined Porsche styling.

What Do Side Sill / Step Trims Do?

Side sill and step trims serve both protective and aesthetic roles in your Porsche, combining practicality with design excellence.

Core Functions:

  • Protect painted sill areas from scratches, scuffs, and dirt.
  • Provide a clean, finished transition between door and floor areas.
  • Reinforce door sill structure and mounting strength.
  • Enhance interior and exterior design with metal or logo-embossed finishes.
  • Prevent corrosion and wear in high-traffic entry points.

A properly fitted sill trim maintains the sleek, premium appearance Porsche interiors are known for while safeguarding bodywork.

Why Do Side Sill / Step Trims Wear or Fail?

Despite their durability, sill trims are among the most exposed parts of your Porsche’s bodywork and interior.

Common Causes of Damage Include:

  • Repeated foot traffic causing scuffs or wear.
  • Fading or discolouration from UV exposure.
  • Cracks or deformation due to impact or temperature changes.
  • Corrosion or pitting on metal sill plates.
  • Loose or broken clips and mounting points.

Damaged or faded sill trims not only detract from your Porsche’s appearance but can also allow moisture to penetrate, leading to corrosion or further wear.

Why Replace or Upgrade Your Porsche Side Sill Trims?

Replacing worn or damaged sill trims restores your Porsche’s clean, refined appearance while protecting against further wear. Upgrading to premium or branded sill plates can also enhance the look and exclusivity of your interior.

Key Benefits:

  • Restores the polished appearance of door sills and entry points.
  • Protects against scuffs, dirt, and moisture.
  • Available in brushed aluminium, stainless steel, or carbon fibre.
  • Compatible with Porsche 911, Boxster, Cayman, Panamera, Macan, and other models.
  • Easy installation with direct-fit mounting clips.
  • Ideal for restorations, refurbishments, or aesthetic upgrades.

High-quality sill trims add both protection and style — preserving your Porsche’s premium look for years to come.

Highlights

  • Precision-crafted Porsche sill and step trims.
  • Durable, corrosion-resistant materials for long-term performance.
  • Protects lower door openings from wear and damage. Enhances cabin and exterior design aesthetics.
  • Direct-fit replacement for classic and modern Porsche models.
  • Perfect for restorations, detailing, and upgrades.       

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