A few weeks ago I wrapped up a post about the Model YL map light being replaced free under warranty, and I closed it with a line I now regret: “no recurrence so far.”
Four days. That is how long the light stayed quiet after Tesla swapped the whole unit.
Then, driving home one evening, I glanced in the rear-view mirror and there it was again — that little glow above the third row.
This post covers round two: the recurrence, the remote diagnosis, the second estimate, the re-repair booking.
The Model YL Map Light Came Back On After Only Four Days
I spotted it four days after the repair, late in the afternoon.
I was driving, looked up at the mirror, and the third-row ceiling had a light on. My honest reaction was somewhere between disbelief and a groan.
The red circle marks the light. Nobody in the car had touched it.
If it is bright enough to notice in daylight, it will be back in my mirror all night long, exactly like before.
Here is how the whole saga looks on a timeline:
- May 23, 2026 — Model YL delivered
- Shortly after delivery — third-row map light starts switching itself on
- July 12, 2026 — light unit replaced under warranty at the Kyoto Shijo Service Center (¥0)
- July 16, 2026 — fault recurs, four days after the replacement
- July 17, 2026 — service estimate issued. Remote diagnosis flags the fault again
- July 18, 2026 — estimate (¥0) approved, re-repair booked
Filing a Second Service Request From the App
Same routine as last time: a service request through the Tesla app.
I wrote something like “the third-row lighting issue you fixed the other day has come back. Nobody is operating it by hand, so could you take a look remotely?”
This time I already knew remote diagnosis was an option, so I asked for it up front.
The screen (in Japanese) reads: “Request service — Other / Interior. Customer statement: the third-row ceiling light was fixed during my 1-month inspection, but it appears to have recurred. I have not switched it on manually, so could you check the situation remotely?” A note at the top warns that adding an issue may affect the appointment time.
I attached a photo of the symptom this round, which the app lets you do right inside the request.
Remote Diagnosis Pointed at the Touch Sensor Again
The day after I sent the request, the service center called.
The remote diagnosis said the touch sensor was registering activations again. On top of that, the vehicle logs were returning a verdict of “replace the light.”
So I asked the question that had been bugging me: could it be the wiring picking up noise rather than the sensor itself?
The answer over the phone was that the wiring had been diagnosed as fine.
The car’s self-diagnosis apparently drills down that far. I was genuinely impressed that a vehicle can isolate a fault to that level from a distance.
That said, it left me uneasy.
The light unit — sensor included — had already been replaced, the fault returned in four days, yet the verdict was once again “replace the light.” That felt like circular logic.
My amateur hunch was that the contacts on the connector were the real culprit rather than the unit itself.
The Estimate Came Back at ¥0 Again
After the call, an estimate landed in the app.
The screen (in Japanese) reads: “Estimate — Customer statement: Other / Interior… ¥0. Tax ¥0. Cost estimate ¥0.” The note explains that repairs covered under warranty are free of charge, that the final cost appears on the invoice Tesla issues after the repair, plus a button to approve the estimate.
The estimate listed two line items.
The line items (in Japanese) read: “1. Remote Diagnosis — price 6,600, adjustment (6,600), subtotal 0.00. Billing category: Goodwill-Internal. 2. Bezel – Map Light – Rear – LH (Model YL) – Remove plus Replace — price 1,320, adjustment (1,320), subtotal 0.00.”
- Remote Diagnosis: ¥6,600 (approx. $44) → adjusted to ¥0
- Bezel – Map Light – Rear – LH (Model YL) – Remove plus Replace: ¥1,320 (approx. $9) → ¥0
The remote diagnosis had cost ¥6,600 on paper last time. This round it was zeroed out under a billing category labelled “Goodwill-Internal,” presumably because it was a repeat visit.
The Parts Line: The Exact Same Unit Again
The part is identical to the first repair: 3R ROW DOME LIGHT (1774351-10-D). The same light, going into the same hole, a second time.
The breakdown (in Japanese) reads: “3R ROW DOME LIGHT (1774351-10-D), qty 1, unit price 3,830, adjustment (3,830), subtotal 0.00, tax rate 10%. Billing category: warranty. Parts total 0.00, labour total 0.00, discount 0.00, consumption tax (10%) 0.00, total (JPY) 0.00.”
The ¥3,830 (approx. $26) part was billed under “warranty” at ¥0. Grand total: ¥0 once again.
I approved the estimate, then booked the re-repair slot.
What Round Two Taught Me
A fault returning four days after a replacement is a letdown. It is not all bad news though.
Because this falls under the new vehicle warranty, Tesla will keep fixing it at no cost until it is actually fixed. If you want the fine print, Tesla publishes its vehicle warranty terms online.
File a request in the app, remote diagnosis runs, an estimate appears, you tap approve. The whole loop was just as painless the second time around.
What I am less sure about is whether swapping in the very same part will actually solve anything. If the contacts really are the problem, it could light up again within days.
Then again, if that happens, I will simply book it in a third time.
At least I know the drill now. The plan is to spend the repair window in the shopping mall across the road — the location around the Kyoto Shijo Service Center makes the wait painless.
I will report back on the re-repair either way, whether it holds or fails again.
Update: the second replacement is done, and this time a technician gave me an actual cause — interior fabric pinched under the light cover, not the wiring I had suspected.
This article is also available in Japanese.
