I'm not sure about the e46...nor which amp you're looking for (DSP or non DSP)...but the e38/e39/e53 share the same DSP amps...they just need to be coded to the specific model to accommodate the number of speakers and spatial dynamics of each particular models cabin etc.

What happens if you put the 11 digit BMW part number into the part number search feature at the multiple online part databases like:

• BMW Parts Catalog
• BMWfans.info

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