Why two converters with similar codes have different prices
Codes that differ by one character, reused part numbers, aftermarket copies and variants: why near-identical catalytic converters can be worth very different amounts.
· Catalytic Price
- One character in a code can mean a different engine, market or year – and a different metal load.
- Aftermarket replacement units often copy the original code but hold a fraction of the metal.
- The same reference can exist in several sizes; the price follows the weight of the substrate.
- Compare photos, full code and condition before you rely on a price.
One character makes a different unit
Car makers issue a new part number whenever the catalyst is changed: a different engine size, a stricter emissions standard, another market, or a cheaper coating later in the model’s life. Codes such as 0H030 and 0H031 are different references with different assays. Always read and type the full code.
Original versus replacement
Replacement (aftermarket) converters sold for repairs must only pass the test, not last fifteen years, so they carry a fraction of the precious metal of the original. Some are stamped with the original code or with no code at all. Tell-tale signs: a thinner shell, a different weld pattern, a smaller or lighter substrate, and a general look that does not match our photos of the reference.
Sizes and variants
The same code can cover a short and a long version of the substrate, or a unit with one or two bricks inside. Our catalogue lists these as separate references where the assays differ; the price follows the weight and content of each.
Condition
A unit that lost part of its honeycomb, was flooded, overheated until the ceramic melted, or was cut and emptied holds less metal than the reference. Our prices assume a complete, original, unopened unit; anything else is re-priced at inspection.
How to be sure
- Type the whole code, including letters that look like digits (O and 0, I and 1).
- Open the converter page and compare the shape, length and pipe layout with our photos.
- Check the Fitted to list: if your car is not there, the code may be reused.
- If still unsure, send photos and we will identify it.
Questions & answers
My code is in the catalogue but the photo looks different. Which price applies?
The one for the reference that matches your unit. If the photos differ, send us your own photos and we will identify it before you travel.
Are converters without any code worth less?
Not necessarily – some originals never had a readable code – but they must be identified by photo and confirmed at inspection.