Audi B16DF52
Specific Equipment Audi e-tron quattro 2019 000001 – 025632 Not Applicable Condition Customer states: A warning message pertaining to a failure of the taillight is displayed in t
Quick answer
For a 2019 US Audi e-tron, DTC B16DF52 is documented in Audi TSB 91 20 42 as occurring with a trunk-lid taillight that does not work or flickers. The supplied evidence does not establish driving or charging safety status.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does B16DF52 mean?
For a 2019 US Audi e-tron, DTC B16DF52 is documented in Audi TSB 91 20 42 as occurring with a trunk-lid taillight that does not work or flickers. The supplied evidence does not establish driving or charging safety status.
2. Technical explanation
NHTSA-hosted Audi manufacturer communication 10172756 (Audi TSB 91 20 42 2058647/1, dated March 2, 2020) identifies B16DF52 among DTCs stored in comfort module 91 for a trunk-lid taillight concern. The communication title states: “Trunk lid taillight does not work or flickers.”
3. What system is affected?
Trunk-lid taillight / comfort module 91.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A taillight-failure warning message may be displayed in the instrument cluster.
- The left or right LED strip may not work or may flicker, as indicated by the supplied TSB summary.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange diagnosis by an Audi service provider, particularly if a taillight warning, inoperative LED strip, or flickering is present.
- Check that exterior lighting is functioning before operating the vehicle, consistent with applicable local road-use requirements.
10. Step-by-step troubleshooting
- Have a qualified technician check for DTC B16DF52 in comfort module 91.
- Have the technician review Audi TSB 91 20 42 2058647/1 / NHTSA communication MC-10172756-0001 for the applicable 2019 Audi e-tron condition.
11. When to contact service
Contact an Audi service provider for diagnosis and provide DTC B16DF52 and the taillight symptom, if present.
12. What the service center may check
- Confirm the customer-reported taillight warning message, if present.
- Inspect for left or right trunk-lid LED-strip inoperation or flickering.
- Scan comfort module 91 for B16DF52 and the other DTCs identified in the bulletin.
- Review applicability of Audi TSB 91 20 42 2058647/1.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Audi e-tron · 2019 · US
15. Related TSBs / service bulletins
- Audi TSB 91 20 42 2058647/1, dated March 2, 2020; NHTSA manufacturer communication MC-10172756-0001. It applies in the supplied evidence to 2019 Audi e-tron quattro vehicles with VIN range 000001–025632 and addresses trunk-lid taillights that do not work or flicker, with DTC B16DF52 among listed comfort-module faults.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
NHTSA Manufacturer Communication PDF 10172756: https://static.nhtsa.gov/odi/tsbs/2020/MC-10172756-0001.pdf
19. Frequently asked questions
What does B16DF52 relate to on a 2019 Audi e-tron?
Verified evidence links it to a trunk-lid taillight concern and identifies it as a DTC stored in comfort module 91.
Can B16DF52 cause a warning message?
The supplied TSB states that a warning message pertaining to taillight failure may be displayed in the instrument cluster.
Is B16DF52 covered by a recall?
Not yet established by verified evidence.
Is it safe to drive or charge with B16DF52?
Not yet established by verified evidence.