Menu
Search
888.687.0539

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Search by Part Number Close
Shopping cart Close

You have no items in your shopping cart.

Menu Close

Parts for Cummins ISX and QSX Engines

Cummins ISX and QSX Parts

We carry a wide selection of parts including alternators and thermostats for Cummins ISX and QSX diesel engines.

If you need any help finding a part, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will promptly assist you.

2892289

BENCH CALIBRATION HARNESS - ISB6.7 / ISX15

Genuine Cummins Part

$283.74

3084879
Hassle-Free Return Item

THERMOSTAT SEAL - ISX / QSX

Genuine Cummins Part

$36.18

3162993

FRONT CRANKSHAFT SEAL REMOVER TOOL - ISX

Genuine Cummins Part

$1,199.28

3691476

BREATHER ELEMENT - ISX1 / QSX11.9 / QSX15 / QSZ13 / ISZ13 (CRANKCASE)

Genuine Cummins Part

$182.05

4318947

THERMOSTAT - ISX / QSX (180degF / 82degC)

Genuine Cummins Part

$120.77

4918413

BANJO CONNECTOR SCREW - ISX

Genuine Cummins Part

$50.69

4919546

FUEL SYSTEM LEAK TESTER - ISX15

Genuine Cummins Part

$219.26

5299721

FUEL PUMP TEST KIT - ISX15 / QSX15

Genuine Cummins Part

$1,043.38

5414049

FUEL INJECTION PUMP GASKET - ISX / QSX

Genuine Cummins Part

$43.27

5496316

REMANUFACTURED TURBOCHARGER - ISX / QSX (4955425D)

Genuine Cummins Part

$12,995.12

DS-3032787

O-RING SEAL - ISX15 / QSX11.9 / QSX15

$1.37

DS-3033740

CHECK VALVE - ISM / QSM / ISX / QSX (ELB FUEL PUM)

$15.52

DS-3067979

CLAMP - ISB / ISX / QSX / ISC / QSC

$40.09

DS-3104230
Hassle-Free Return Item

EGR VALVE GASKET - ISX / QSX

$19.77

DS-3680201

IDLER GEAR BUSHING - ISX / QSX

$20.54

DS-3687058

PISTON COOLING NOZZLE - ISX / QSX

$19.01

DS-3896337

V-BAND CLAMP - L10

$55.03

DS-3922794
Hassle-Free Return Item

O-RING - ISC / QSM / M11 / KTA38/QSK38

$0.60

DS-4101884

VIBRATION DAMPER - ISX / QSX / ISB / QSB / B SERIES

$731.98

DS-4318947
Restocking Fee Applies

THERMOSTAT - ISX / QSX (180degF / 82degC)

$48.75

DS-4935092

FUEL TRANSFER PUMP - ISX / QSX

$405.75

DS-4935094

FUEL TRANSFER PUMP - ISX15 / ISZ13 / QSX11.9 / QSX15

$356.88

DS-4965698

HEXAGON FLANGE HEAD CAP SCREW - QSM11 / ISM / L10 / ISX

$7.68

DS-70624
Hassle-Free Return Item

O-RING - KTA19 / VT903

$1.01

R-3798514

REMANUFACTURED TURBOCHARGER - ISX / QSX (HE451VE)

Additional refundable core charge: $818.40 (See Details)

$9,482.19

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
company information
Resources
Returns

Payment options

Complete your payment with a Visa card Complete your payment with a Master card Complete your payment with an American Express card Complete your payment using PayPal
Diesel Parts Direct BBB Business Review

Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

Copyright © 2026 Diesel Parts Direct. All rights reserved.
CID: 2