Independent parts atlas sources attached
Porsche 993 · 900 123 011 20
This guide joins the factory catalogue reference to the exact products documented below. It does not certify interchangeability or provide manufacturing dimensions.
Each specification below names the exact product it describes. Alternative-part values are not measurements of the Genuine Porsche part. Missing properties are not estimated.
Not published by the cited source
Applies to: Elring 128.503 · aftermarket alternative
Read the specification source · checked
Elring's current first-party standard-parts table publishes the dimensions and material code for Elring 128.503. It does not publish a piece weight.
The cited manufacturer table does not publish a piece weight; no retailer shipping weight is substituted.
inner diameter: 22 mm · outer diameter: 27 mm · thickness: 1.5 mm
Applies to: Elring 128.503 · aftermarket alternative
Read the specification source · checked
Elring's current first-party standard-parts table publishes the dimensions and material code for Elring 128.503. It does not publish a piece weight.
Copper (CU)
Applies to: Elring 128.503 · aftermarket alternative
Read the specification source · checked
Elring's current first-party standard-parts table publishes the dimensions and material code for Elring 128.503. It does not publish a piece weight.
Check the VIN, variant, quantity and installation requirements before ordering. Availability is a dated observation, not a delivery guarantee.
900 123 011 20 · genuine
in stock · reviewed
Page reached: HTTP 200
The live Porsche-specific direct product page identifies exact reference 900 123 011 20 with manufacturer Genuine, current pricing, Ship Tomorrow availability and Add to cart.
128.503 · aftermarket alternative
in stock · reviewed
Page reached: HTTP 200
The live direct product page publishes exact Porsche comparison reference 90012301120, Elring supplier code 128.503, A22x27x1.5 copper dimensions, three units available and Add to cart.
No historical original-equipment manufacturer has been verified for this reference. A replacement brand alone does not establish who supplied Porsche production.
Porsche uses this 22 x 27 mm sealing-ring reference in several catalogue positions. Confirm the PET position and sealing material for the specific service operation rather than relying on a retailer's drain-plug title alone.
Illustration 198-00 · catalogue page 121 · position 1.
The reference is transcribed from the catalogue. A listing alone does not establish every vehicle variant or installation condition.
Porsche Classic Genuine Parts Catalogue — 911 993, 1994–1998