OBD Guide
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B1129

Front Right Side Air Bag Module Open

B1129 is an OBD-II diagnostic trouble code meaning: Front Right Side Air Bag Module Open. Common causes: broken or damaged wiring harness (harness), malfunction of the squib module. 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
  • Disabling the restraint system
  • Lack of airbag response in an accident

Causes

  • Broken or damaged wiring harness (harness)
  • Malfunction of the squib module
  • Corrosion or oxidation of contacts
  • Damage to the airbag module

How to Fix

  1. Check the resistance of the module circuit with a multimeter
  2. Inspect the wiring harness for damage
  3. Check contacts for corrosion
  4. Replace the faulty module or wiring harness
  5. Reset the error with a scanner after repair

Related codes

B1128B1130B1000

FAQ

What does the B1129 code mean?

B1129 is an OBD-II diagnostic trouble code that indicates: Front Right Side Air Bag Module Open

What causes a B1129 error code?

The most common causes of B1129 include: Broken or damaged wiring harness (harness); Malfunction of the squib module; Corrosion or oxidation of contacts; Damage to the airbag module.

How do I fix a B1129 diagnostic trouble code?

To fix B1129: Check the resistance of the module circuit with a multimeter. Inspect the wiring harness for damage. Check contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1129?

Do not drive — repair immediately

How much does it cost to fix B1129?

The estimated repair cost for B1129 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat