Home Peterbilt 378 Parts & Accessories

Peterbilt 378 Parts & Accessories

Filters

In stock (105)
Out of stock (60)

$ From

$ To

Blue Bird_Commercial Bus (33)
Blue Bird_Wanderlodge (42)
Crane Carrier_Drill Rig (39)
Crane Carrier_Equipment Carrier (33)
Crane Carrier_Low Entry (56)
Ford_A9513 (31)
Ford_AT9513 (31)
Ford_AT9522 (29)
Freightliner_Argosy (91)
Freightliner_Cascadia (47)
Freightliner_Century Class (73)
Freightliner_Classic (46)
Freightliner_Classic XL (39)
Freightliner_Columbia (97)
Freightliner_Condor (33)
Freightliner_Coronado (58)
Freightliner_FLC112 (34)
Freightliner_FLD112 (48)
Freightliner_FLD120 (77)
Freightliner_FLD120SD (34)
Freightliner_FLD132 (83)
Freightliner_M2 106 (34)
Freightliner_XC Raised Rail (34)
International_2674 (37)
International_5500i (68)
International_5600i (74)
International_5900i (52)
International_7600 (40)
International_7700 (37)
International_8100 (35)
International_8600 SBA (39)
International_9100i SBA (37)
International_9200i SBA (94)
International_9200 SBA (34)
International_9400 (32)
International_9400i SBA (96)
International_9900i (84)
International_9900i SFA (38)
International_9900ix (71)
International_LoneStar (40)
International_ProStar (56)
Kenworth_C500 (100)
Kenworth_K100E (46)
Kenworth_T300 (33)
Kenworth_T600A (113)
Kenworth_T660 (64)
Kenworth_T800 (118)
Kenworth_T2000 (111)
Kenworth_W900 (117)
Mack_CL (56)
Oshkosh Motor Truck Co._H (47)
Oshkosh Motor Truck Co._Highland (31)
Oshkosh Motor Truck Co._P (35)
Oshkosh Motor Truck Co._S (58)
Peterbilt_320 (88)
Peterbilt_330 (50)
Peterbilt_357 (145)
Peterbilt_362 (66)
Peterbilt_365 (71)
Peterbilt_367 (75)
Peterbilt_375 (34)
Peterbilt_377 (72)
Peterbilt_378 (165)
Peterbilt_379 (151)
Peterbilt_384 (62)
Peterbilt_385 (116)
Peterbilt_386 (81)
Peterbilt_387 (101)
Peterbilt_388 (81)
Peterbilt_389 (58)
Peterbilt_587 (30)
Pierce Mfg. Inc._Arrow XT (47)
Pierce Mfg. Inc._Custom (30)
Pierce Mfg. Inc._Dash (33)
Pierce Mfg. Inc._Enclosed Cab (40)
Pierce Mfg. Inc._Lance (31)
Pierce Mfg. Inc._Quantum (35)
Pierce Mfg. Inc._Velocity (41)
Roadmaster Rail_S-Monocoque (44)
Spartan Motors_Gladiator (31)
Spartan Motors_K2 (40)
Spartan Motors_K3 (31)
Sterling Truck_A9500 (67)
Sterling Truck_AT9500 (58)
Sterling Truck_Condor (37)
Sterling Truck_L9500 (58)
Sterling Truck_LT9500 (61)
Sterling Truck_LT9513 (37)
Sterling Truck_ST9500 (34)
Volvo_VNL (77)
Volvo_VNM (70)
Volvo_VT (34)
Western Star_3800 (34)
Western Star_4800 (37)
Western Star_4900 (36)
Western Star_4900EX (70)
Western Star_4900FA (97)
Western Star_4900SA (94)
Western Star_5800 (33)
Western Star_6900XD (44)

A/C Compressor Connector (1)
A/C Condenser (1)
A/C Refrigerant Pressure Sensor (1)
Accelerator Pedal Sensor (1)
Accessory Drive Belt Tensioner Assembly (1)
Air Brake Pressure Sensor (1)
Air Charge Temperature Sensor (1)
Auto Trans Speed Sensor (1)
Barometric Pressure Sensor (3)
Bumper (1)
Clutch Starter Safety Switch (1)
Dash Board Air Vent (4)
Diesel Injection Control Pressure Sensor (1)
Diesel Oxidation Catalyst (DOC) (5)
Diesel Particulate Filter (8)
Diesel Particulate Filter (DPF) Clamp (3)
Diesel Particulate Filter (DPF) Gasket (3)
Diesel Particulate Filter (DPF) Hardware Kit (1)
Door Check Strap (2)
Door Mirror Control Module (1)
Engine Camshaft Position Sensor (5)
Engine Control Module (ECM) (3)
Engine Coolant Level Sensor (1)
Engine Coolant Temperature Sensor (3)
Engine Coolant Thermostat (4)
Engine Crankshaft Position Sensor (6)
Engine Harmonic Balancer (2)
Engine Oil Dipstick (1)
Engine Oil Drain Plug (5)
Engine Oil Drain Plug Gasket (3)
Engine Oil Filler Cap (2)
Engine Oil Pan (8)
Engine Oil Pan Gasket (1)
Engine Oil Pressure Sensor (5)
Engine Oil Temperature Sensor (3)
Engine Timing Cover (1)
Engine Valve Cover Gasket (1)
Exhaust Brake Actuator (2)
Exhaust Clamp (3)
Exhaust Gas Differential Pressure Sensor (1)
Exhaust Gas Recirculation (EGR) Cooler (2)
Exhaust Gas Recirculation (EGR) Cooler Clamp (1)
Exhaust Gas Recirculation (EGR) Cooler Gasket Kit (1)
Exhaust Gas Recirculation (EGR) Cooler Installation Kit (1)
Exhaust Gas Recirculation (EGR) Gasket Set (1)
Exhaust Gas Recirculation (EGR) Valve (4)
Exhaust Gas Recirculation (EGR) Valve Temperature Sensor (1)
Exhaust Manifold (1)
Exhaust Pipe Bellow (3)
Fuel Injector O-Ring Kit (2)
Fuel Pressure Sensor (1)
Fuel Tank Sending Unit (3)
Fuel Tank Sending Unit-Universal (1)
Fuel Tank Strap (2)
Hood Hinge Spring (2)
Hood Restraint Cable (2)
HVAC Heater Blend Door Actuator (1)
HVAC Heater Control Knob (2)
HVAC Heater Water Shut-Off Valve Actuator (2)
Interior Door Handle (2)
Manifold Absolute Pressure Sensor (4)
Multi-Function Switch (2)
Outside Door Handle (5)
Steering Tie Rod End (1)
Throttle Body Motor (1)
Turbocharger Boost Pressure Valve (1)
Turbocharger Boost Sensor (5)
Turbocharger Outlet Gasket (1)
Turbocharger Speed Sensor (1)
Variable Pressure Output Device (1)
Water In Fuel (WiF) Sensor (1)
Window Crank Handle (1)
Window Motor and Regulator Assembly (2)
Window Regulator (1)
Windshield Washer Nozzle (2)

Agility Autoparts (3)
Dorman-HD Solutions (150)
Dorman-OE Solutions (1)
MotoRad (6)
Replacement (4)
Standard Motor Parts (1)

Sort by

Compare

View as

Compare

HVAC Heater Water Shut-Off Valve Actuator Dorman-HD Solutions 604-5103

Original price $80.91 - Original price $80.91

Original price

$80.91

$80.91 - $80.91

Current price $80.91

| /

HVAC Heater Water Shut-Off Valve Actuator Dorman-HD Solutions 604-5103

Dorman-HD Solutions

in stock

Original price $80.91 - Original price $80.91

Original price

$80.91

$80.91 - $80.91

Current price $80.91

| /

Save 0% Save %

Compare

Engine Oil Pan Dorman-HD Solutions 264-5056

Original price $506.92 - Original price $506.92

Original price

$506.92

$506.92 - $506.92

Current price $506.92

| /

Engine Oil Pan Dorman-HD Solutions 264-5056

Dorman-HD Solutions

in stock

Original price $506.92 - Original price $506.92

Original price

$506.92

$506.92 - $506.92

Current price $506.92

| /

Save 0% Save %

Compare

Fuel Tank Sending Unit-Universal Dorman-HD Solutions 285-5403

Original price $68.10 - Original price $68.10

Original price

$68.10

$68.10 - $68.10

Current price $68.10

| /

Fuel Tank Sending Unit-Universal Dorman-HD Solutions 285-5403

Dorman-HD Solutions

in stock

Original price $68.10 - Original price $68.10

Original price

$68.10

$68.10 - $68.10

Current price $68.10

| /

Save 0% Save %

Compare

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7107

Original price $84.95 - Original price $84.95

Original price

$84.95

$84.95 - $84.95

Current price $84.95

| /

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7107

Dorman-HD Solutions

Out of stock

Original price $84.95 - Original price $84.95

Original price

$84.95

$84.95 - $84.95

Current price $84.95

| /

Sold out

Compare

Engine Oil Pan Dorman-HD Solutions 264-5054

Original price $655.02 - Original price $655.02

Original price

$655.02

$655.02 - $655.02

Current price $655.02

| /

Engine Oil Pan Dorman-HD Solutions 264-5054

Dorman-HD Solutions

in stock

Original price $655.02 - Original price $655.02

Original price

$655.02

$655.02 - $655.02

Current price $655.02

| /

Save 0% Save %

Compare

Engine Camshaft Position Sensor Dorman-HD Solutions 904-7129CD

Original price $58.43 - Original price $58.43

Original price

$58.43

$58.43 - $58.43

Current price $58.43

| /

Engine Camshaft Position Sensor Dorman-HD Solutions 904-7129CD

Dorman-HD Solutions

Out of stock

Original price $58.43 - Original price $58.43

Original price

$58.43

$58.43 - $58.43

Current price $58.43

| /

Sold out

Compare

Exhaust Gas Recirculation (EGR) Cooler Clamp Dorman-HD Solutions 904-5154

Original price $53.61 - Original price $53.61

Original price

$53.61

$53.61 - $53.61

Current price $53.61

| /

Exhaust Gas Recirculation (EGR) Cooler Clamp Dorman-HD Solutions 904-5154

Dorman-HD Solutions

in stock

Original price $53.61 - Original price $53.61

Original price

$53.61

$53.61 - $53.61

Current price $53.61

| /

Save 0% Save %

Compare

Windshield Washer Nozzle Dorman-HD Solutions 924-5403CD

Original price $41.94 - Original price $41.94

Original price

$41.94

$41.94 - $41.94

Current price $41.94

| /

Windshield Washer Nozzle Dorman-HD Solutions 924-5403CD

Dorman-HD Solutions

Out of stock

Original price $41.94 - Original price $41.94

Original price

$41.94

$41.94 - $41.94

Current price $41.94

| /

Sold out

Compare

Outside Door Handle Dorman-HD Solutions 760-5426

Original price $88.43 - Original price $88.43

Original price

$88.43

$88.43 - $88.43

Current price $88.43

| /

Outside Door Handle Dorman-HD Solutions 760-5426

Dorman-HD Solutions

in stock

Original price $88.43 - Original price $88.43

Original price

$88.43

$88.43 - $88.43

Current price $88.43

| /

Save 0% Save %

Compare

Engine Oil Drain Plug Dorman-HD Solutions 090-5004CD

Original price $15.32 - Original price $15.32

Original price

$15.32

$15.32 - $15.32

Current price $15.32

| /

Engine Oil Drain Plug Dorman-HD Solutions 090-5004CD

Dorman-HD Solutions

in stock

Original price $15.32 - Original price $15.32

Original price

$15.32

$15.32 - $15.32

Current price $15.32

| /

Save 0% Save %

Compare

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5002CD

Original price $65.07 - Original price $65.07

Original price

$65.07

$65.07 - $65.07

Current price $65.07

| /

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5002CD

Dorman-HD Solutions

Only 1 left!

Original price $65.07 - Original price $65.07

Original price

$65.07

$65.07 - $65.07

Current price $65.07

| /

Save 0% Save %

Compare

Diesel Particulate Filter (DPF) Gasket Dorman-HD Solutions 674-9067

Original price $49.49 - Original price $49.49

Original price

$49.49

$49.49 - $49.49

Current price $49.49

| /

Diesel Particulate Filter (DPF) Gasket Dorman-HD Solutions 674-9067

Dorman-HD Solutions

Out of stock

Original price $49.49 - Original price $49.49

Original price

$49.49

$49.49 - $49.49

Current price $49.49

| /

Sold out

Compare

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7142

Original price $82.65 - Original price $82.65

Original price

$82.65

$82.65 - $82.65

Current price $82.65

| /

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7142

Dorman-HD Solutions

Out of stock

Original price $82.65 - Original price $82.65

Original price

$82.65

$82.65 - $82.65

Current price $82.65

| /

Sold out

Compare

Fuel Pressure Sensor Dorman-HD Solutions 904-7110

Original price $87.00 - Original price $87.00

Original price

$87.00

$87.00 - $87.00

Current price $87.00

| /

Fuel Pressure Sensor Dorman-HD Solutions 904-7110

Dorman-HD Solutions

in stock

Original price $87.00 - Original price $87.00

Original price

$87.00

$87.00 - $87.00

Current price $87.00

| /

Save 0% Save %

Compare

Turbocharger Boost Sensor Dorman-HD Solutions 904-7130

Original price $72.08 - Original price $72.08

Original price

$72.08

$72.08 - $72.08

Current price $72.08

| /

Turbocharger Boost Sensor Dorman-HD Solutions 904-7130

Dorman-HD Solutions

in stock

Original price $72.08 - Original price $72.08

Original price

$72.08

$72.08 - $72.08

Current price $72.08

| /

Save 0% Save %

Compare

Variable Pressure Output Device Dorman-HD Solutions 904-5202

Original price $442.94 - Original price $442.94

Original price

$442.94

$442.94 - $442.94

Current price $442.94

| /

Variable Pressure Output Device Dorman-HD Solutions 904-5202

Dorman-HD Solutions

Out of stock

Original price $442.94 - Original price $442.94

Original price

$442.94

$442.94 - $442.94

Current price $442.94

| /

Sold out

Compare

Door Mirror Control Module Dorman-HD Solutions 904-5406

Original price $231.56 - Original price $231.56

Original price

$231.56

$231.56 - $231.56

Current price $231.56

| /

Door Mirror Control Module Dorman-HD Solutions 904-5406

Dorman-HD Solutions

in stock

Original price $231.56 - Original price $231.56

Original price

$231.56

$231.56 - $231.56

Current price $231.56

| /

Save 0% Save %

Compare

Exhaust Gas Recirculation (EGR) Cooler Dorman-HD Solutions 904-5035

Original price $1,935.98 - Original price $1,935.98

Original price

$1,935.98

$1,935.98 - $1,935.98

Current price $1,935.98

| /

Exhaust Gas Recirculation (EGR) Cooler Dorman-HD Solutions 904-5035

Dorman-HD Solutions

Out of stock

Original price $1,935.98 - Original price $1,935.98

Original price

$1,935.98

$1,935.98 - $1,935.98

Current price $1,935.98

| /

Sold out

Compare

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5001CD

Original price $77.91 - Original price $77.91

Original price

$77.91

$77.91 - $77.91

Current price $77.91

| /

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5001CD

Dorman-HD Solutions

Only 1 left!

Original price $77.91 - Original price $77.91

Original price

$77.91

$77.91 - $77.91

Current price $77.91

| /

Save 0% Save %

Compare

Barometric Pressure Sensor Dorman-HD Solutions 904-7128

Original price $61.11 - Original price $61.11

Original price

$61.11

$61.11 - $61.11

Current price $61.11

| /

Barometric Pressure Sensor Dorman-HD Solutions 904-7128

Dorman-HD Solutions

Out of stock

Original price $61.11 - Original price $61.11

Original price

$61.11

$61.11 - $61.11

Current price $61.11

| /

Sold out

Compare

Diesel Oxidation Catalyst (DOC) Dorman-HD Solutions 674-3106

Original price $3,004.67 - Original price $3,004.67

Original price

$3,004.67

$3,004.67 - $3,004.67

Current price $3,004.67

| /

Diesel Oxidation Catalyst (DOC) Dorman-HD Solutions 674-3106

Dorman-HD Solutions

Out of stock

Original price $3,004.67 - Original price $3,004.67

Original price

$3,004.67

$3,004.67 - $3,004.67

Current price $3,004.67

| /

Sold out

Compare

Exhaust Brake Actuator Dorman-HD Solutions 904-7108

Original price $169.22 - Original price $169.22

Original price

$169.22

$169.22 - $169.22

Current price $169.22

| /

Exhaust Brake Actuator Dorman-HD Solutions 904-7108

Dorman-HD Solutions

Out of stock

Original price $169.22 - Original price $169.22

Original price

$169.22

$169.22 - $169.22

Current price $169.22

| /

Sold out

Compare

Throttle Body Motor Dorman-HD Solutions 341-5001

Original price $147.76 - Original price $147.76

Original price

$147.76

$147.76 - $147.76

Current price $147.76

| /

Throttle Body Motor Dorman-HD Solutions 341-5001

Dorman-HD Solutions

Out of stock

Original price $147.76 - Original price $147.76

Original price

$147.76

$147.76 - $147.76

Current price $147.76

| /

Sold out

Compare

Hood Hinge Spring Dorman-HD Solutions 938-5407CD

Original price $58.58 - Original price $58.58

Original price

$58.58

$58.58 - $58.58

Current price $58.58

| /

Hood Hinge Spring Dorman-HD Solutions 938-5407CD

Dorman-HD Solutions

Out of stock

Original price $58.58 - Original price $58.58

Original price

$58.58

$58.58 - $58.58

Current price $58.58

| /

Sold out

Sort by

Peterbilt 378 Parts & Accessories

Filters

HVAC Heater Water Shut-Off Valve Actuator Dorman-HD Solutions 604-5103

Engine Oil Pan Dorman-HD Solutions 264-5056

Fuel Tank Sending Unit-Universal Dorman-HD Solutions 285-5403

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7107

Engine Oil Pan Dorman-HD Solutions 264-5054

Engine Camshaft Position Sensor Dorman-HD Solutions 904-7129CD

Exhaust Gas Recirculation (EGR) Cooler Clamp Dorman-HD Solutions 904-5154

Windshield Washer Nozzle Dorman-HD Solutions 924-5403CD

Outside Door Handle Dorman-HD Solutions 760-5426

Engine Oil Drain Plug Dorman-HD Solutions 090-5004CD

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5002CD

Diesel Particulate Filter (DPF) Gasket Dorman-HD Solutions 674-9067

Manifold Absolute Pressure Sensor Dorman-HD Solutions 904-7142

Fuel Pressure Sensor Dorman-HD Solutions 904-7110

Turbocharger Boost Sensor Dorman-HD Solutions 904-7130

Variable Pressure Output Device Dorman-HD Solutions 904-5202

Door Mirror Control Module Dorman-HD Solutions 904-5406

Exhaust Gas Recirculation (EGR) Cooler Dorman-HD Solutions 904-5035

Engine Oil Drain Plug Gasket Dorman-HD Solutions 095-5001CD

Barometric Pressure Sensor Dorman-HD Solutions 904-7128

Diesel Oxidation Catalyst (DOC) Dorman-HD Solutions 674-3106

Exhaust Brake Actuator Dorman-HD Solutions 904-7108

Throttle Body Motor Dorman-HD Solutions 341-5001

Hood Hinge Spring Dorman-HD Solutions 938-5407CD

Added to your cart:

Compare products