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Safety regulations for handling pyrotechnic belt tensioners — AUDI

Safety regulations for handling pyrotechnic belt tensioners on Audi: factory workshop procedure. Full factory text, tools and checks.

Workshop procedure for AUDI — the factory write-up, straight from real workshop data.

factory workshop text

📋 Procedure

Safety regulations for handling pyrotechnic belt tensioners
Testing, fitting and repair work is only to be performed by qualified personnel.
Never use test lamp, voltmeter or ohmmeter for checking.
Belt tensioner units are only to be checked in situ using suitable vehicle diagnostic, testing and information systems (e.g.
vehicle diagnostic, testing and information system
VAS 5051B
) .
Before handling belt tensioner units (e.g. to unplug connector), the person concerned must
“discharge static”
, for example by briefly grasping hold of door striker plate.
Always disconnect power supply when working on belt tensioners.
“Conventional ignition lock:”
Heed measures to be taken when disconnecting battery
Electrical system
Rep. Gr.
27.
“Electronic ignition lock (e.g. A6 as of Model Year 2005; A8 as of Model Year 2003):”
Contrary to the procedure described for
“Disconnecting and connecting battery”
(
Electrical system
Rep. Gr.
27
), the battery must be disconnected with the ignition on when removing the belt tensioner unit.
Disconnect battery earth strap/cable and cover negative terminal. No waiting time is necessary after disconnecting the battery.
There must not be anyone in the vehicle when connecting the battery.
Heed measures to be taken after connecting battery
Electrical system
Rep. Gr.
27
Battery
.
When connecting belt tensioner unit, all mechanical parts (including those of the three-point seat belt) must be properly anchored.
Other than the person performing the work, there should be no-one in the vehicle.
Belt tensioner components are neither to be opened nor repaired; always use new parts.
Belt tensioner units which have been dropped onto a hard surface or reveal signs of damage are no longer to be fitted.
Always replace mechanically damaged (dented, cracked) belt tensioner units.
Belt tensioner units must be installed immediately following removal from their transportation containers.
Return belt tensioner unit to transportation container if work has to be interrupted.
Never point open end of belt tensioner at another person.
Always wash hands after handling ignited belt tensioners.
Storage and transportation are governed by the relevant local legislation.
Belt tensioner units are never to be left unattended.
Belt tensioner units are not to be treated with grease, cleaning agents or the like.
Belt tensioner units are not to be exposed to temperatures in excess of 100° C even for brief periods.

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Workshop data on this page last updated 20 Sep 2026.