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Dryalite Moisture-Fix Kit | BMW X5 F15 (2013-18) 305239308 Dust Cap (Pair)

Dryalite absorbs humidity from the air inside your headlight. Choose your vehicle to find the right kit.

Kit: £50.00 - Available.

Dryalite Moisture-Fix Kit | BMW X5 F15 (2013-18) 305239308 Dust Cap (Pair)

Fitment and specification

Dryalite Headlight Moisture-Fix Kit (Pair)
Fits: BMW X5 F15 with removable twist-off dust caps
✓ Helps reduce internal headlight condensation over time
✓ Quick DIY install (typically under 2 minutes)
✓ Reusable desiccant if moisture returns
✓ Helps protect expensive headlights (often £700+ each to replace)
Compatibility
This kit is for BMW X5 F15 headlights that use a removable twist-off dust cap.
Dust cap part number (moulded on the cap): 305 239 308
(May also appear without spaces as 1305239308 depending on how it's written.)
Fitment (Please Read)
BMW X5 F15 uses more than one dust cap type. This listing fits caps labelled 305 239 308 only.
If your original cap is labelled 305 219 150 please check my other listing.
Photo note: the fitted example image is of a BMW M4, the cap design is shared across models when the part number matches. This part has been confirmed to fit on the BMW F15 X5 (using the same part number)
Unsure? Send me a clear photo of your dust cap (number + overall shape) and I'll confirm fitment.
Not compatible
  • Headlights with non-removable / sealed rear covers (no twist-off access cap)
  • Caps with a different part number (see Compatibility section)
What's Included
  • 2 × Dryalite Moisture-Fix Caps (left + right)
  • 2 × 50g silica gel desiccant packs
Installation (no tools)
  1. Open the bonnet and locate the access dust cap on the top of the headlight.
  2. Twist the original cap off by hand.
  3. Fit the Dryalite cap in its place.
  4. The desiccant will absorb moisture over time.
Notes (Please Read)
  • This kit is intended for condensation / humidity issues. If there is standing water, a cracked lens, or damaged seals, the underlying leak should be repaired first.
Re-activating the Desiccant
Microwave: 3–5 minutes at 700W.
Oven: 30–60 minutes at 100–120°C.
30-day money-back guarantee

How does Dryalite reduce condensation?

Dryalite holds moisture-absorbing silica gel inside vehicle-specific headlight caps. It absorbs water vapour from the air inside the headlight, leaving less moisture available to condense on the lens.

Twist-off cap kits need no cutting or drilling. The sealed-cap F10 kit uses a different fitting method explained in its product details.

Recurring misting, not active leaks. If the headlight is cracked or has pools of water inside, Dryalite will not fix it. Repair the fault first.

Green means recharge.

Remove the silica packets, dry them until the beads turn orange, let them cool, then put them back.

30-day full-refund guarantee

If it does not help, return your kit within 30 days for a full refund.

Questions before ordering.

Will Dryalite fix every condensation problem?

No. Dryalite absorbs humidity from the air inside the headlight. It cannot repair a cracked headlight or deal with pools of water inside it.

Is the silica gel loose inside the headlight?

No. The silica packets sit securely inside the Dryalite cap, away from the bulb and reflector.

How quickly should I see a difference?

Some buyers see an improvement within hours. Allow a few days, as every headlight starts with a different amount of moisture.

How do I choose the right kit?

Choose your model above and compare the product photos with your headlight cap. Contact us if you want help checking.

Can the silica gel be reused?

Yes. Orange means ready and green means saturated. When the beads turn green, remove and dry the silica packets, let them cool fully, then refit them. Never heat the caps or seals.

Do I need to permanently modify my headlights?

Twist-off cap kits require no permanent modification. The sealed-cap F10 kit uses a different fitting method, so check its product details before ordering.

How often will the silica need recharging?

It depends on the weather and your headlight. Check the indicator beads and recharge only when they turn green.

What if Dryalite does not help?

Return the kit within 30 days for a full refund.