Air filter illustration – not the actual part
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Air filter illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Caterpillar3400 SeriesAir Filters

DS-1421403 Air Filter Element For Caterpillar C9 And 3406 Diesel Engines

Inner

OEM #: 1421403SKU: DS1421403

Ships in 1-2 days

$117.11

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

The DS-142-1403 air filter element can be used for the following Caterpillar engine models:

  • 345B, 345B II, 345C, 345C MHPU, 345D
  • 735, 740, 770, 772
  • 3406C
  • C9
  • TK1051
  • W345C
SKU DS1421403
OEM Number 1421403
Part Type Filters, Air
OEM Brand CATERPILLAR

Aftermarket warranty

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  • Orders are processed the same or next business day
  • Expedited shipping options available at Checkout
  • If same-day shipping is critical, please call to confirm availability

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Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.