B0076 code meaning
Third Row Left Seat Belt Pretensioner Deployment Control
What B0076 means
B0076 belongs to the pretensioner at the left seat of the third row, a position found only in vehicles with a third seat row. No carmaker publishes B0076 with this meaning. Mercedes shows how third-row units are logged in practice: its LI54.21-P-070658 names open-circuit faults of the emergency tensioning retractors at the left and right of the third seat row as B00E7 and B00E6, the C-stage slots, so a B0076 is not to be expected on those models. The circuit itself is a pyrotechnic squib that the airbag module checks for opens, shorts and resistance drift, as with the front retractor and buckle units GM and NHTSA describe. If B0076 is stored, the airbag lamp is on and the third-row left occupant may not get any pretensioning.
B0076 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0076
- Airbag warning lamp on
- Third-row left occupant without pretensioning in a crash
- Safety note: pyrotechnic belt component; disconnect the battery and wait before touching it, repair at a specialist workshop
Common causes of B0076
- Most likelyPlug at the third-row left belt disturbed by folding or removing the seat
- PossibleHarness damaged by luggage or trim work in the cargo area
- Less likelyAirbag module coded for a third-row pretensioner that is not fitted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Third row left pretensionerSquib circuitSRS control module
What each part of B0076 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 76 | The exact fault in that area. |
What to do next
- Note B0076 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0076
What does B0076 mean?
B0076 means "Third Row Left Seat Belt Pretensioner Deployment Control". B0076 belongs to the pretensioner at the left seat of the third row, a position found only in vehicles with a third seat row. It is a generic code, so it means the same on every make.
Is it safe to drive with B0076?
B0076 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0076 fail an emissions test?
B0076 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0076 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B0076 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.