Airbag-Steuergerät
What Triggers Airbags?
What triggers the airbag? The airbag is triggered by the airbag control unit when crash sensors measure a deceleration of at least 3 to 5 g and the calculated change in velocity e…
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Practical know-how on airbag and restraint-system repair — explained clearly.
- Crashsensor
How Does a Crash Sensor in a Car Work?
How does a crash sensor work? A crash sensor is an acceleration sensor that measures the sudden deceleration of the vehicle during an impact. If the measured acceleration exceeds…
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When does the crash sensor trigger?
When does the crash sensor trigger? The crash sensor triggers when the measured vehicle deceleration exceeds a threshold of 3 to 5 g – equivalent to three to five times Earth's gr…
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Crash Sensor Defective: Symptoms, Causes & Repair
How do you identify a faulty crash sensor? A faulty crash sensor is indicated by a continuously illuminated airbag warning light. The complete airbag system (SRS) is deactivated f…
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What is the SRS system in a car?
What is the SRS system in a car? SRS stands for "Supplemental Restraint System" – a supplementary restraint system. It includes all passive safety components in the vehicle that p…
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Mercedes SRS Malfunction: What to Do?
SRS Malfunction in Mercedes: What Does the Message Mean? The message "SRS Restraint System Malfunction – Visit Workshop" in the Mercedes instrument cluster indicates an error in t…
Read more - Wickelfeder
What does the coil spring do in a car?
What does the clock spring do in a car? The clock spring (also called a slip ring or airbag clock spring) establishes the electrical connection between the rotating steering wheel…
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Clear Airbag Error: Guide & Tools
What does clearing an airbag error mean? Clearing an airbag error means resetting stored fault codes in the airbag control unit using a diagnostic device. The fault memory registe…
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Is the SRS Light TÜV-Relevant?
Is the SRS warning light relevant for TÜV inspection? Yes, the SRS control light (airbag warning light) is fully relevant for TÜV inspection during the main inspection (HU). A con…
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At what speed does the airbag deploy?
At what speed does the airbag deploy? The airbag does not deploy at a specific driving speed, but rather at a specific deceleration (braking force). In a frontal collision with a…
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How much does an airbag control module cost?
How much does an airbag control unit cost? A new airbag control unit costs between 400 and 1,500 euros depending on the vehicle brand and model. Installation and programming at a…
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Airbag Control Module Defective: Symptoms, Causes & Repair
How do you recognize a defective airbag control unit? A defective airbag control unit is recognized by the continuously illuminated airbag warning light in the instrument cluster.…
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Where is the coil spring located?
Where is the clock spring located in the car? The clock spring is located between the steering wheel and the steering column on the driver's side. It is housed in a closed casing…
Read more - Sitzbelegungsmatte
How Does a Seat Occupancy Mat Work?
What is a seat occupancy mat? The seat occupancy mat is a sensitive sensor in the passenger seat designed to detect whether the seat is occupied. Unfortunately, this component is…
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Delete Crash Data After Accident: Here's How
Delete Crash Data After an Accident: Here's How It Works After an accident, the airbag control unit stores crash data in EEPROM memory and locks itself. This data cannot be delete…
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Where is the crash sensor located in the car?
Where are the crash sensors located in the car? Crash sensors are installed at multiple locations in the vehicle: at the front in the engine compartment or behind the bumper, on t…
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Disabling Airbags: When and How?
When can the passenger airbag be switched off? The passenger airbag must be switched off when a rear-facing child seat (reboarder) is installed on the passenger seat. This is lega…
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Airbag Control Module: Repair or Replacement?
Repair or replacement – which is better? In over 90% of cases, repairing the airbag control unit is the better choice: it costs only a fraction of a new purchase, is faster, and r…
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What does a crash sensor cost?
How much does a crash sensor cost? A new crash sensor as a replacement part typically costs between 80 and 200 euros. Installation costs range from 50 to 150 euros depending on th…
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Where is the airbag control unit located?
Where is the airbag control unit located in the car? In most vehicles, the airbag control unit is centrally located in the interior under the center console on the transmission tu…
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Broken Coil Spring: Symptoms, Causes & Repair
How do you recognize a defective clock spring? A defective clock spring can be identified by an illuminated airbag warning light, a non-functioning horn, and failed steering wheel…
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When does the seat belt pretensioner activate?
When does the seat belt pretensioner activate? The seat belt pretensioner activates as soon as the airbag control unit detects an impact via the crash sensors that exceeds a certa…
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Can You Reset an Airbag Control Module?
Can an airbag control unit be reset? Yes, an airbag control unit can be reset after an accident – but not with standard diagnostic software. The stored crash data is located in th…
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Clear Airbag Error: Can You Do It Yourself?
Clear Airbag Error: Can You Do It Yourself? Clearing simple airbag error codes is technically possible with specialized OBD-2 diagnostic devices – but standard Bluetooth scanners…
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What is an SRS control unit?
What is an SRS control unit? The SRS control unit (Supplemental Restraint System) is the central control unit of the airbag system in the vehicle. It evaluates the signals from al…
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Airbag Recalls 2026: Current Overview
Airbag Recalls 2026: Current Overview Numerous airbag recall campaigns are ongoing in Germany in 2026 as well – particularly the worldwide Takata recall continues to affect millio…
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Seat Belt Pretensioner Activated: How to Recognize It
Seat belt pretensioner triggered: How to recognize it You can recognize a triggered seat belt pretensioner by the fact that the seat belt can no longer be pulled out or only a few…
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Can you drive without a torsion bar?
Can you drive without a clock spring? Technically, the vehicle is roadworthy with a defective clock spring – but the driver airbag is non-functional and would not deploy in an acc…
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Airbag Light After Battery Change: Causes & Solutions
Airbag Light After Battery Replacement: Causes & Solution If the airbag warning light remains on after a battery replacement or disconnection, it is usually due to a voltage error…
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Can a torsion spring be repaired?
Can a contact spring be repaired? Yes, a defective contact spring can be repaired in many cases. The most common defect is a torn flat ribbon cable inside – this can be replaced b…
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How Does an Airbag Work? Simply Explained
How does an airbag work? An airbag is a gas-filled air cushion that deploys within 30 milliseconds during a collision and cushions the impact for occupants. Crash sensors detect t…
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Airbag Deployed: What to Do?
Airbag deployed – what to do now After an accident with a deployed airbag, the entire restraint system must be inspected and repaired. The airbag control unit stores crash data an…
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Is the coil spring a wear part?
Is the spiral cable a wear part? Yes, the spiral cable (also called slip ring or airbag contact unit) is a wear part. Due to constant mechanical stress with every steering movemen…
Read more - Sitzbelegungsmatte
Seat Occupancy Mat vs. Simulator: Pros and Cons
Seat Occupancy Mat vs. Simulator: Pros and Cons The airbag warning light (SRS) is on, the TÜV inspection is coming up, and the workshop presents a quote for several hundred euros?…
Read more - Sitzbelegungsmatte
Seat Occupancy Mat Defective: Symptoms, Causes & Repair
How do you identify a faulty seat occupancy mat? A faulty seat occupancy mat is indicated by a continuously illuminated airbag warning light and a constantly active seat belt warn…
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Airbag Light On: Causes, Dangers & Solutions
Why is the airbag light on? The airbag light stays on continuously when the control unit detects a fault in the restraint system. This means: The airbag system is deactivated and…
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Can you drive with SRS light on?
Can you drive with the SRS light on? Yes, in principle you are allowed to continue driving with the SRS/airbag warning light illuminated – there is no airbag requirement in German…
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Airbag Warning Light Won't Turn Off: What to Do?
Airbag warning light won't turn off: What to do? If the airbag warning light stays on continuously after starting the engine, there is a malfunction in the SRS system. The restrai…
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Airbag Light Failed TÜV Inspection: What to Do?
Airbag Warning Light at MOT: Why Do You Fail? A continuously illuminated airbag warning light is classified as a major defect during the main inspection (MOT). The inspector refus…
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What does the SRS warning light mean?
What does the SRS warning light mean? The SRS warning light indicates the status of the airbag system. SRS stands for "Supplemental Restraint System." If it remains illuminated af…
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Airbag Control Module Programming: When Is It Necessary?
When does an airbag control unit need to be programmed? An airbag control unit must always be programmed (coded) when it is newly installed or replaced. After a repair or crash da…
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