Hyundai C2703
005-1 for available down level BSD/BCW replacement parts. NOTICE BLIND SPOT DETECTIONS (BSD) OR BLIND-SPOT COLLISION WARNING (BCW) TSB #: 19-BE-011H-1 Page 2 of 11 SUBJECT: Tools R
Quick answer
C2703 is documented by Hyundai’s TSB 19-BE-011H-1 in connection with Blind Spot Detection (BSD) or Blind-Spot Collision Warning (BCW) systems. The supplied evidence does not establish the exact fault definition for C2703.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does C2703 mean?
C2703 is documented by Hyundai’s TSB 19-BE-011H-1 in connection with Blind Spot Detection (BSD) or Blind-Spot Collision Warning (BCW) systems. The supplied evidence does not establish the exact fault definition for C2703.
2. Technical explanation
NHTSA-published Hyundai manufacturer communication 19-BE-011H-1 discusses cases of DTC C2702/C2703 for vehicles equipped with BSD/BCW. It states that if the BSD/BCW sensor is confirmed damaged by external impact or collision, sensor replacement is not covered under warranty. It also states that when C2702/C2703 is present and the bracket is confirmed damaged, only the bracket should be replaced. The bulletin references TSB 18-BE-005-1 for available down-level BSD/BCW replacement parts.
3. What system is affected?
Blind Spot Detection (BSD) or Blind-Spot Collision Warning (BCW).
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A C2703 diagnostic trouble code may be present. No driver-visible symptoms are established by the supplied verified evidence.
6. Possible causes
- Damage to a BSD/BCW sensor from external impact or a collision is discussed by the bulletin in cases involving C2702/C2703.
- A damaged BSD/BCW bracket is discussed by the bulletin in cases involving C2702/C2703.
- The precise cause or fault definition of C2703 is 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 a qualified Hyundai service provider or other qualified repair facility.
- If the vehicle has had an external impact or collision, tell the service provider because the bulletin specifically addresses sensor and bracket damage in C2702/C2703 cases.
- Do not assume a BSD/BCW sensor needs replacement; the bulletin states that only the bracket should be replaced when the bracket is confirmed damaged.
10. Step-by-step troubleshooting
- Confirm whether the vehicle is equipped with BSD/BCW.
- Have the BSD/BCW sensor and its bracket inspected for confirmed external-impact, collision, or bracket damage.
- Use the manufacturer’s applicable BSD/BCW diagnostic and sensor-angle measurement procedure. The bulletin identifies radar sensor angle-measurement tools, but the supplied evidence does not provide a complete user-level procedure.
11. When to contact service
Service inspection is appropriate. The supplied Hyundai bulletin gives repair-direction information for C2702/C2703 when sensor or bracket damage is confirmed, but it does not establish urgency, drivability, or charging status.
12. What the service center may check
- Check for confirmed external-impact or collision damage to BSD/BCW sensor(s).
- Check whether BSD/BCW bracket(s) are confirmed damaged.
- If a bracket is confirmed damaged in a C2702/C2703 case, the bulletin states to replace only the bracket(s).
- Refer to TSB 18-BE-005-1 for available down-level BSD/BCW replacement parts, as directed by TSB 19-BE-011H-1.
- Use required BSD/BCW radar sensor angle-measurement equipment according to the manufacturer procedure.
13. Possible repair or resolution
- If the BSD/BCW bracket is confirmed damaged in a C2702/C2703 case, Hyundai TSB 19-BE-011H-1 states that only the bracket(s) should be replaced.
- If sensor damage is confirmed from external impact or collision, the bulletin states sensor replacement is not covered under warranty.
- The supplied evidence does not establish all repairs that may resolve C2703.
14. Affected vehicles
- Hyundai Kona · 2016–2019 · US
- Hyundai Sonata · 2016–2019 · US
15. Related TSBs / service bulletins
- Hyundai TSB 19-BE-011H-1, published through NHTSA as Manufacturer Communication MC-10169370 on 2019-11-04. It applies to all vehicles equipped with BSD/BCW and addresses C2702/C2703 in relation to confirmed sensor or bracket damage.
- Hyundai TSB 18-BE-005-1 is referenced by TSB 19-BE-011H-1 for available down-level BSD/BCW replacement parts. Its full contents are not supplied here.
16. Recall information
- No recall is established by the supplied verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10169370, Hyundai TSB 19-BE-011H-1: https://static.nhtsa.gov/odi/tsbs/2019/MC-10169370-9999.pdf
19. Frequently asked questions
What system is associated with C2703 in the supplied evidence?
The evidence associates C2703 with Hyundai Blind Spot Detection (BSD) or Blind-Spot Collision Warning (BCW).
Does C2703 prove that the BSD/BCW sensor must be replaced?
No. In C2702/C2703 cases where the bracket is confirmed damaged, Hyundai’s bulletin says to replace only the bracket(s).
Can collision damage affect warranty coverage?
Hyundai’s bulletin states that BSD/BCW sensor replacement is not covered under warranty when the sensor is confirmed damaged by external impact or a collision accident.
Which vehicles are listed in the supplied applicability data?
Hyundai Kona and Sonata, model years 2016 through 2019, US region. The bulletin evidence itself describes applicability as all vehicles equipped with BSD/BCW.