B173d Peugeot Work __top__ • Plus & Original

Understanding the B173D fault code in a Peugeot is essential for maintaining vehicle safety and performance. This specific diagnostic trouble code (DTC) typically relates to the vehicle’s airbag or pretensioner system, often pointing toward a "stop lamp switch" or "brake light switch" circuit malfunction that interacts with the safety deployment modules.

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Key or Remote Failure: The internal transponder chip or the hands-free remote battery may be failing. b173d peugeot work

| Repair Type | Parts Cost | Labor (Shop) | Total Estimate (USD/EUR) | | :--- | :--- | :--- | :--- | | Replace pre-heat relay only | $25–$50 | $60–$100 | $85–$150 | | Replace BPGA unit | $250–$400 | $100–$150 | $350–$500 | | Replace battery + BMS coding | $180–$250 | $50 | $230–$300 | | Full diagnosis + BPGA replacement | N/A | $150–$200 | $400–$600 | Understanding the B173D fault code in a Peugeot

Important Safety Warnings

• Always disable the vehicle battery for at least 5–10 minutes before working on any SRS component.
• Never use a multimeter or test light directly on airbag circuit wiring without proper SRS-safe tools – accidental deployment risk.
• After repair, verify passenger airbag status indicator works correctly: ignition ON, switch OFF → "PASS AIRBAG OFF" illuminated; switch ON → light OFF.
• If you are not trained in SRS systems, delegate to a qualified technician – incorrect repair can cause airbag non-deployment in a crash.