Hey guys, I have a 2009 GS350 AWD with about 111k miles that I bought back in December 2020. Love the car but it has an odd issue, when parked with the engine off, the exterior lights flash occasionally but VERY briefly. Every few minutes you'll see the exterior LED lights (mirror turn signals, tail lights) flash for a fraction of a second. Whenever the lights blink I hear a click, like a relay. The battery has never died on me so far and there are no other electronic quirks; everything works fine. I have never noticed this happening with the engine running either.

I have no clue where to begin to look. I noticed that ALL interior lights are LED; did the car have those from the factory? I'm wondering if the previous owner replaced bulbs with some cheap LEDs and therefore causing this funky issue.

 

The interior lights are not super bright, so if yours are then more likely they have been replaced.

 

Gotcha, but were the factory interior lights LEDs?

 

I doubt they are replaceable. All interior lights are LEDs from the factory