OBD Guide
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B1635

Rear Airbag Sensor Left Circuit Malfunction

B1635 is an OBD-II diagnostic trouble code meaning: Rear Airbag Sensor Left Circuit Malfunction. Common causes: open or short circuit in wiring harness, left rear airbag sensor malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • The SRS system may not work in an emergency situation
  • Possible errors in other security systems

Causes

  • Open or short circuit in wiring harness
  • Left rear airbag sensor malfunction
  • Poor contact in connectors
  • Damage to the SRS control unit

How to Fix

  1. Check wiring harness for damage
  2. Check the contacts in the sensor and control unit connectors
  3. Replace the faulty sensor if necessary
  4. Reset the error and check the system

Related codes

B1630B1636B1640

FAQ

What does the B1635 code mean?

B1635 is an OBD-II diagnostic trouble code that indicates: Rear Airbag Sensor Left Circuit Malfunction

What causes a B1635 error code?

The most common causes of B1635 include: Open or short circuit in wiring harness; Left rear airbag sensor malfunction; Poor contact in connectors; Damage to the SRS control unit.

How do I fix a B1635 diagnostic trouble code?

To fix B1635: Check wiring harness for damage. Check the contacts in the sensor and control unit connectors. Replace the faulty sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1635?

Do not drive — repair immediately

How much does it cost to fix B1635?

The estimated repair cost for B1635 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat