Why do Prius taillights and brake lights fail frequently, and how can this be fixed?

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Why do Prius taillights and brake lights fail frequently, and how can this be fixed?

Some Prius models, especially imported ones, suffer from frequent taillight and brake light failures.
Could this be caused by moisture leakage, wiring faults, o r LED circuit board failure?
What are the best replacement taillights available in the Pakistani market?

Sirat Ul Jinan asked on 15 Feb 2025 12:09:49 pm

1 Answer

19 views |

Car Mechanic Expert - on 15 Feb 2025 12:16:22 pm

Causes of Taillight & Brake Light Failures:

Moisture Leakage: Faulty seals o r cracks in the taillight housing can allow moisture to enter, which can short-circuit the bulbs o r cause corrosion.
Wiring Faults: Poor wiring connections o r damaged circuits can prevent the lights from working properly.
LED Circuit Board Failure: Some Prius models with LED taillights may suffer from circuit board failure, especially in humid o r extreme conditions.

Solution:

Seal the Housing: If moisture is the issue, replace the seals around the taillight housing o r use a silicone sealant to prevent water from entering.
Inspect Wiring: Check the wiring connections for corrosion o r loose connections and repair as needed.
Replace LED Circuit Board: If the issue is with the circuit board, you may need to replace the entire taillight assembly o r have the circuit board repaired.