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Schrader 21230 / DBL4 tool

952 views 0 replies 1 participant last post by  htsmi  
#1 ·
So I purchased a used one of these tools on ebay to program the Schrader 33500 aftermarket TPMS sensors I have in my current set of wheels. I was tired of spending a fortune on TPMS issues that shops can't seem to fix reliably.

Problem is, the tool tells me it needs a firmware update in order to be able to program the sensor. Schrader's website has an "update your programming tool" link that sends me in circles. From what I can tell they only actually give access to registered shops. Any ideas or suggestions?