Rennlist

Odd behaviour from my Xenons last night.

Add to repair workspace

New repair projectOpen repair workspace

Original source

7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHOdd behaviour from my Xenons last night.

Leading reported evidence

Repair car

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Dealer repaired my car under warranty.
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Read full discussion summary

Leading evidence: 'Repair car' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair car' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 7 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Replace headlight switch and everything is ok

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Had the same problem a couple of months ago...Replaced the headlight switch and everything is ok!
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Replace switch

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Mine was behaving similarly before the dealer replaced the switch under CPO.
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Repair car

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Dealer repaired my car under warranty.
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Replace headlight switch and everything is ok

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Had the same problem a couple of months ago...Replaced the headlight switch and everything is ok!
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Replace switch

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed
Mine was behaving similarly before the dealer replaced the switch under CPO.
Original post Read captured discussion
Odd behaviour from my Xenons last night.

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

turned on the headlight switch. City lights come on, no ignition. After about 5 seconds, they pop on. Odd. Is this the bulb going? Ballast? I have the original bulbs since '03. What is their approximate lifespan (obviously based on the strikes the bulb makes). Figure 5x/week for 6 years.

POST 2Original post

I've had 4 cars with HID lights now, and they don't seem to have a consistent life. Both Porsches still have their original bulbs, and are still going strong. My Saab 9-5 had the bulbs go out after only about 3 years. Before they went out, they tended to dim a little, and to turn more of a purple hue. They would also flicker occasionally. The issue you are describing sounds a little different...

POST 3 / ORIGINAL POSTEROriginal post

I thought it was a connection issue but with both lamps doing this in sync, I'm wondering what it is. Maybe a fluke.

POST 4Original post

Sounds like it's the headlight switch

POST 5Original post

My guess would be headlight switch too. Mine was behaving similarly before the dealer replaced the switch under CPO.

POST 6Original post

Had the same problem a couple of months ago...Replaced the headlight switch and everything is ok! Quite straight forward DIY. Nikos.

POST 7Original post

It sounds like the igniter on you headlights may be failing. This happened to the lights on my 996 and if it is the same problem I experienced the length of time they take to light up will get progressively worse. Dealer repaired my car under warranty.

This is a source reference. Confirm exact model applicability in the original material.