B13D3 on Mazda vehicles

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Mazda filed with NHTSA whose summary names B13D3. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• MT-004-19 Service bulletin
  2019-11-20 · Engine And Engine Cooling
• Some customers may complain about:  Intermittent engine no start  Instrument cluster red security indicator light ON  Engine Start/Start Button Amber indicator light flashing  Battery discharge  Electrical relay buzzing noise  DTC B13D3:94 (Communication error with remote transmitter) stored.This may be caused by:  A key in a purse near a cell phone. The cell phone radio waves
• SA-048-20 Service bulletin
  2020-04-28 · Engine And Engine Cooling
• Some customers may expierience an engine no start condition where the engine will only start by holding the key transmitter over the Start/Stop button and DTC B13D3:97 (Remote transmitter registration work not completed) is stored. This may be caused by an accidental activation of the keyless pacemaker function.
• SA-048-20a Service bulletin
  2020-09-21 · Equipment
• Some customers may experience an engine no start condition where the engine will only start by holding the key transmitter over the Start/Stop button. This may be caused by an accidental activation of the keyless pacemaker function. NOTE:  DTC B13D3:97 (Remote transmitter registration work not completed) is stored if key programming is performed when keyless pacemaker function is activated. 
• SA-004-25a Service bulletin
  2025-02-08 · Electrical System
• Key Transmitter Power Saving Function: When the key transmitter Power Saving Function is turned ON, transmitter battery power consumption is restricted, thereby extending the transmitter battery life and the following will occur: The engine will not start unless the key transmitter is held over the Start Stop button. • Outside door handle lock/unlock touch sensor is inoperative. • Key transmitter

A stored code names the test that failed, never the part that caused it. The record above is what Mazda and its owners have filed about it; the code’s page across every make has the whole file.