Cummins ISX Air Brake Compressor — 3687343 / 4318220
Cummins ISX Air Brake Compressor — 3687343 / 4318220
SKU: WIHMCCK-ebay-AH003
Confirm your fit before ordering.
Match the original OE number, engine configuration, mounting points and connections.
U.S. shipping & delivery
Free standard shipping from our U.S. warehouse to the contiguous 48 states, with no minimum order. Estimated transit: 2–7 business days after carrier pickup. Business-day orders receive tracking the same business day; the first carrier scan may appear later.
Alaska, Hawaii, Washington, D.C., territories and military addresses are excluded. For expedited options, contact us before ordering. Full shipping policy
30-day returns & one-year warranty
Request a change-of-mind return within 30 days after delivery. Items must be unused, uninstalled and complete; customers pay return shipping for non-quality returns. Contact us for authorization and the designated U.S. return address before sending an item.
A one-year warranty covers defects in materials or workmanship under normal use. Installed products with a suspected defect should be submitted as warranty claims. Read all return and warranty terms
WIHMCCK air brake compressor assembly for Cummins ISX / QSX; matching 3687343 compressor configuration.
Part identification and fitment
| Store SKU | AH003 |
|---|---|
| Brand | WIHMCCK |
| Product type | Air brake compressor assembly |
| OE / cross-reference numbers | 3687343 / 4318220 / 9111530190 |
| Engine / application | Cummins ISX / QSX; matching 3687343 compressor configuration |
| Year / configuration check | Match by engine serial number |
| Condition | New aftermarket replacement |
| Package contents | 1x Air Brake Compressor Assembly |
Important configuration details
Match the 3687343 / 4318220 compressor family, flange, gear and ports. Other Cummins ISX-family compressors can use different configurations.
Fitment questions
Which part number should I match?
Start with 3687343 / 4318220 / 9111530190. These numbers identify the intended reference family; they do not establish compatibility with every engine or truck carrying the same model name.
What should I check before ordering?
Compare the installed part number, engine serial number (ESN) or VIN, mounting points, ports and physical design with the photos and details above. For service kits, also compare the contents and the parent assembly. Contact WIHMCCK for fitment help before ordering if any detail differs.
Vehicle and OE brand names identify the intended application. This is an aftermarket replacement; it is not represented as a genuine part from the vehicle or OE manufacturer.