718 - rear light condensation

[Tony B2]

Is it really acceptable to have significant condensation inside the rear lights, after driving 120 miles on a dry, sunny, warm day?

And the previous 2 days were dry too!

[Discombobulate]

Tony B2 said:

Is it really acceptable to have significant condensation inside the rear lights, after driving 120 miles on a dry, sunny, warm day?

And the previous 2 days were dry too!

You had a warm day? It was minus 5C here (Glos) last night and only briefly hit 10C during the day. Car is already iced up again.

[Tony B2]

Discombobulate said:

Tony B2 said:

Is it really acceptable to have significant condensation inside the rear lights, after driving 120 miles on a dry, sunny, warm day?

And the previous 2 days were dry too!

You had a warm day? It was minus 5C here (Glos) last night and only briefly hit 10C during the day. Car is already iced up again.

Definitely warm during the day - felt like low teens at least (that is warm after the grimness of the last few months!)

There was a light frost overnight - maybe -1C

[LemonTart]

I had this don't worry, it comes and goes.

[Boy0]

On my last two CGTS 4.0's I had condensation droplets inside the rear nearside light clusters lenses. The droplets were ever present whatever the weather conditions. Both light units were replaced by my OPC under warranty.

[paddy1970]

No, significant condensation inside rear lights after driving in dry, sunny conditions for multiple days isn't normal or acceptable, especially on a modern vehicle.

Significant or persistent condensation indicates a problem with the seals or ventilation of the light unit.

I'd recommend having it addressed promptly rather than hoping it will dry out on its own, as the problem is likely to worsen over time, especially with changing weather conditions.

[scrounger73]

I have the technical bulletin regarding condensation in head and tail lights but have no idea how to post a PDF on here

[M11rph]

[Tony B2]

Many thanks for sharing this service bulletin.

My Spyder's lights are probably around L2 but the difference between this and L1 is difficult to define based on these pictures.

Looks like another trip to the dealer is required.

More M27 hassle...I hate the M27!

[Techno9000]

My reading of the TSB is that L1 affects areas of the light covers that the light doesn't pass through, in essence the edges, L2 affects areas of the light covers that the light passes through.
Check out the example photos for L1 and L2 with that in mind...

[Tony B2]

Here was my car, after 50 miles or so driving on a warm, completely dry day (last Friday).

I think that is pretty close to L2.

Edited by Tony B2 on Thursday 6th March 23:45

[Gt4user]

More to do with storage and external weather temps that change dramatically in a short period.

Have had this on multiple porkers, 997.2 was the worst.

Come to think of it, had this on an vantage as well.

Edited by Gt4user on Friday 7th March 08:42

[OPOGTS]

Tony B2 said:

Here was my car, after 50 miles or so driving on a warm, completely dry day (last Friday).

I think that is pretty close to L2.

Edited by Tony B2 on Thursday 6th March 23:45

Mine are nearly always like this (the car is 4 years old this week), I've never really thought about it to be honest but maybe I need to get it sorted! Bit annoying as the car was with Porsche last week for its big service!

Keep us updated

[Techno9000]

Tony B2 said:

Here was my car, after 50 miles or so driving on a warm, completely dry day (last Friday).

I think that is pretty close to L2.

Edited by Tony B2 on Thursday 6th March 23:45

As the upper brake light components are obscured by the mist it looks like L2 at least.
The lower picture seems to me to show some heavier droplets in the mist ( might be compression artefacts in the photo though...), so possibly tending towards L3.

Edited by Techno9000 on Monday 17th March 09:15