Alcohol interlock*. Alcohol interlock* - functions and operation. Alcohol interlock* - storage. Alcohol interlock* - before starting the engine
The alcohol interlock in the Volvo S80 (2nd generation, 2013–2016) is a preventive safety system that ensures the driver is sober before the engine can be started. This section describes operation, the required breath test and the meaning of the indicators. It also explains the driver's responsibility. Recommendations for storing and caring for the alcohol interlock unit help ensure reliable function.
Alcohol interlock*
The alcohol interlock is designed to prevent the vehicle from being driven by a drunk driver. Before the engine can be started, the driver must pass a breath test confirming that they are not under the influence of alcohol. The alcohol interlock is calibrated to the alcohol limit applicable in each market.
WARNINGThe alcohol interlock is an aid that does not relieve the driver of responsibility in road traffic. It is always the driver's responsibility to be sober and to drive the vehicle safely.
Related information
- Alcohol interlock* - functions and operation
- Alcohol interlock* - storage
- Alcohol interlock* - before starting the engine
- Alcohol interlock* - notes
- Alcohol interlock* - symbols and text messages
Alcohol interlock* - functions and operation
Functions

- Mouthpiece for breath test.
- Switch.
- Transmit button.
- Battery status lamp.
- Breath test result lamp.
- Lamp indicates readiness for breath test.
Handling - battery
The alcohol interlock indicator lamp (4) shows the battery status:

Always keep the alcohol interlock unit in its holder. This ensures that the built-in battery remains fully charged and that the alcohol interlock is automatically activated when the vehicle is unlocked.
Related information
- Alcohol interlock*
- Alcohol interlock* - storage
- Alcohol interlock* - before starting the engine
- Alcohol interlock* - notes
- Alcohol interlock* - symbols and text messages
Alcohol interlock* - storage
Always keep the alcohol interlock unit in its holder. To release the handheld unit, press it lightly into the holder and then let go. It will spring out and can be removed from the holder.

Storage and charging station for the handheld unit.
- Return the handheld unit to the holder. Push the unit in until it clicks.
- Keep the handheld unit in the holder. This is where it is best protected and the batteries stay fully charged.
Related information
- Alcohol interlock*
- Alcohol interlock* - functions and operation
- Alcohol interlock* - before starting the engine
- Alcohol interlock* - notes
- Alcohol interlock* - symbols and text messages
Alcohol interlock* - before starting the engine
The alcohol interlock is automatically activated when the vehicle is unlocked and is prepared for use.

1. When indicator lamp (6) lights up green, the alcohol interlock is ready for use.
2. Pull the alcohol interlock out of its holder. If the alcohol interlock is outside the vehicle when it is unlocked, it must first be activated with switch (2).
3. Fold out the mouthpiece (1), breathe in deeply and blow steadily into it until a click is heard after approx. 5 seconds. The result is displayed as one of the options listed in the following table, Breath test results.
4. If no message is displayed, the transmission to the vehicle may have failed. In this case, press button (3) to send the result manually to the vehicle.
5. Fold down the mouthpiece and place the alcohol interlock back in its holder.
6. After passing the breath test, start the engine within 5 minutes. Otherwise, the breath test must be repeated.
Breath test results

A The limit value varies by country; check the value applicable in your market. See Alcohol interlock.
CAUTIONAfter the trip ends, the engine can be restarted within 30 minutes without a new breath test.
Related information
- Alcohol interlock*
- Alcohol interlock* - functions and operation
- Alcohol interlock* - storage
- Alcohol interlock* - notes
- Alcohol interlock* - symbols and text messages
The alcohol interlock of the Volvo S80 (2nd gen) is an important safety feature that prevents the engine from starting without a passed breath test. It helps reduce the risk of alcohol-related driving and supports the driver in acting responsibly.
Thanks to simple operation, clear indicators and regular maintenance, the system remains reliable. Nevertheless, it remains the driver's responsibility to always be fit to drive.
Volvo combines technology and responsibility for greater safety on the road.
Test yourself
A quick Volvo S80 quiz: every answer comes with an explanation and a link to the manual page.