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Need more info as this question has many answers.

1. If your low beam headlights don't work, possibly bad dimmer switch, or both low beams are burned out (one burned out without noticing before the other one burned out. Replace the bulbs is all.

2. Your hi beam indicator is inoperative but you have high beams and low beams (replace dash bulb).

3. If equipped, the high beam and low beam relay is bad. Replace the relay.

4. Possibly a wiring problem, last resort

If it is a lamp/bulb, see sources and related links below for lamp/bulb info.

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Q: What could be the cause for the dimmer beam not working on a 2009 Jetta. Do you need new light or can you just replace the bulb?
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