Diagsheet

Symptom explainer · every vehicle on the site

Tail lights or brake lights fail

Most reported: 2015 GMC Yukon with 247 reports. Across the 92 model years on this site with at least five, owners filed 1,778.

  • 1,778owner reports
  • 92model years affected
  • 55,000median miles
  • 10involved a crash
  • 9involved a fire

These owners find a tail light or brake light dead, and then learn the fix is a whole lamp assembly rather than a bulb. Water inside the lens comes up again and again.

Which cars report it most · By model · When it happens · What it is and what to do

The 25 vehicles with the most reports

Each row is one model year. The bar is its count of tail light failure reports; the share is how much of that car's complaint file this problem takes up. Bigger sellers draw more reports, so read the share alongside the count. Red dots mark crashes and fires in these reports; amber marks a recall on the same system.

  1. 1
    24748% of its complaints60k mi
  2. 2
    15921% of its complaints60k mi
  3. 3
    12240% of its complaints71k mi
  4. 4
    12024% of its complaints50k mi
  5. 5
    9435% of its complaints52k mi
  6. 6
    7839% of its complaints53k mi
  7. 7
    2014 Hyundai Sonata1 crash3 fires
    527% of its complaints75k mi
  8. 8
    4711% of its complaints50k mi
  9. 9
    4622% of its complaints41k mi
  10. 10
    4623% of its complaints54k mi
  11. 11
    3723% of its complaints50k mi
  12. 12
    348% of its complaints35k mi
  13. 13
    3322% of its complaints61k mi
  14. 14
    3013% of its complaints45k mi
  15. 15
    246% of its complaints61k mi
  16. 16
    2417% of its complaintsfew mileages
  17. 17
    202% of its complaints80k mi
  18. 18
    2010% of its complaintsfew mileages
  19. 19
    192% of its complaints5k mi
  20. 20
    171% of its complaints40k mi
  21. 21
    121% of its complaints60k mi
  22. 22
    123% of its complaintsfew mileages
  23. 23
    1210% of its complaintsfew mileages
  24. 24
    1211% of its complaintsfew mileages
  25. 25
    112% of its complaintsfew mileages

Where it dominates the complaint file

Model years with at least 25 reports, ranked by the share of all their complaints that describe tail light failure. That takes most of the sales-volume effect out (small sellers still swing more).

  1. 1
    24748% of its complaints60k mi
  2. 2
    12240% of its complaints71k mi
  3. 3
    7839% of its complaints53k mi
  4. 4
    9435% of its complaints52k mi
  5. 5
    12024% of its complaints50k mi
  6. 6
    4623% of its complaints54k mi
  7. 7
    3723% of its complaints50k mi
  8. 8
    3322% of its complaints61k mi
  9. 9
    4622% of its complaints41k mi
  10. 10
    15921% of its complaints60k mi

By model, every year together

The 12 models with the most reports. Each chip is a model year; the darker chip is its worst year.

When it happens

1,071 of the 1,778 reports state a mileage. The middle half fall between 40,000 and 75,000 miles; the median is 55,000. Each column is a 20,000-mile band.

Tail Light and Brake Light Failure reports by mileage at failure: 0: 69, 20k: 190, 40k: 325, 60k: 263, 80k: 141, 100k: 44, 120k: 26, 140k: 9, 160k: 1, 180k: 2, 200k+: 169019020k32540k26360k14180k44100k26120k9140k1160k2180k1200k+

Reports by model year

Every report of tail light failure, grouped by the model year of the car. 10 involved a crash and 9 a fire. 5 people were hurt.

Tail Light and Brake Light Failure reports by model year: 2014: 309, 2015: 655, 2016: 331, 2017: 233, 2018: 88, 2019: 57, 2020: 5, 2021: 38, 2022: 23, 2023: 39309'14655'15331'16233'1788'1857'195'2038'2123'2239'23

What owners describe

Share of the 1,778 reports that use each phrase. One report can use several.

it happens with LED lights specifically43%
water or condensation inside the lens42%
one side went out first40%
the whole assembly needed replacing23%
it comes and goes intermittently11%
other drivers cannot tell I am braking8%

What got replaced

Reports that name the part, across every vehicle.

the LED module714
the tail light assembly369
the bulb209
the wiring or socket65

What it is and what to do

It's a small group, close to 1,800 complaints across the vehicles on this site, and heavily weighted toward a few models. The 2015 GMC Yukon and Yukon XL and the 2014 Dodge Durango account for close to a third of it between them. Water, moisture or fogging comes up in about 42 percent of reports. Owners mention an assembly or housing about twice as often as a bulb. The median mileage given is about 54,000.

Moisture is the thread running through the recalls in the data. Acura's 19V-256 and 25V-259 dealt with water getting into the tailgate lid lights and wiring on some MDX models, which could kill the tail lights. Tesla's 22V-844 used a software update to fix tail lights that could fail to light at random.

An older case shows how these disputes can end. In NHTSA's 2004 investigation EA04-021, GM said some brake and tail lamp sockets were failing early and set up a 6-year, 72,000-mile special coverage policy on almost a million vehicles, then recalled the ones that policy hadn't already fixed. So ask the dealer whether any special coverage or service bulletin applies to your lamp. NHTSA also posts the bulletins manufacturers send it, searchable by year, make and model.

Checking is simple. Have someone stand behind the car while you press the brake pedal and switch on the lights. Firestone notes that on some vehicles a dead brake lamp also turns on the brake warning light on the dash, so that light can be the first clue.

Don't leave it. The recall language is direct: tail lights and brake lights that don't light reduce your visibility to other drivers and raise the risk of a crash. Until it's fixed, avoid driving at night if a tail light is out.

Tell the shop which lamp, whether it's constant or comes and goes, and whether you've seen water in it after rain or a car wash. Run the VIN through NHTSA's recall lookup first. For anything else, get the failure on a repair order during the warranty; the FTC says a defect reported in that period must be fixed even if the warranty ends before the repair.

Counts are unique NHTSA complaints on the 1,040 vehicle model years that have a page here, grouped by the word patterns described on the method page. A vehicle needs five matching reports to be counted in this ranking. Checked Sep 27, 2026. All problem explainers.