To change the third brake light on a Renault Laguna, first, open the trunk and locate the access panel or cover at the rear of the vehicle, often found near the rear window. Remove any screws or clips securing the panel and gently pull it away to expose the light assembly. Disconnect the wiring harness from the old brake light, replace it with the new one, and reassemble the access panel by securing it back in place. Finally, test the new brake light to ensure it’s functioning properly.
under the engine beside the paseneger wheel, blue connector
changeing side light bulb
Check the brake light switch.
After a repair has been made on a Renault Laguna the service light will need to be reset. To do this plug the diagnostic tool into the computer and reset the light.
its the tyre pressure sensor
How to remove drivers' side light cover
Behind front off side light in engine bay, in Laguna 11 Hatchback 1.8ltr
Try asking at www.renaultforums.co.uk :-)
Alternator bad or wiring fault to alternator.
To change the high-level brake light on a Renault Espace, first, ensure the vehicle is turned off and the keys are removed. Open the tailgate and locate the access panel or screws that secure the high-level brake light assembly. Remove the panel or screws, disconnect the old light bulb or assembly, and replace it with a new one. Reassemble the access panel or screws, and test the brake light to ensure it’s functioning properly.
did you figure out how to? mine has the same problem
Bring to a shop that has an ABS scanner to determine the problem