Isuzu FXR
IsuzuClass 7–8

Isuzu FXR

The heavy-hauling Class 8 cabover at the top of Isuzu's Low Cab Forward range.

The FXR was the largest Low Cab Forward Isuzu ever sold in North America (2005–2009) — buildable as a Class 7 single-axle (33,000 lb GVWR) or Class 8 tandem (up to ~56,000 lb GVW) in 4x2 or 6x4 on the 6HK1 7.8L diesel, with a rare run of VINs even carrying GM's gasoline Vortec 5.3L V8.

Maker
Isuzu Motors
Years
2005–2009
Body
Cabover
Rating
Up to 56,000 lb GVWR
Power
250–300 hp
Applications
Heavy vocational, Dump, Regional, Tractor
Engines
Isuzu 6HK1 7.8L dieselGM Vortec 5.3L gas

Trouble with your FXR?

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Common replacement parts

Real products from the PartsNow catalog. Confirm fitment with Mike before ordering.

3030HNTRX - 3030 SPEC LONG SHAFT HNTRX BRAKE CHAMBER

3030HNTRX

3030HNTRX - 3030 SPEC LONG SHAFT HNTRX BRAKE CHAMBER

OTR10143 - AUTO SLACK ADJUSTER, 11/2-10DRIVE 5.5,6.5

OTR10143

OTR10143 - AUTO SLACK ADJUSTER, 11/2-10DRIVE 5.5,6.5

5-808330 - BRAKE KIT FOR 4709DEN SHOES

5-808330

5-808330 - BRAKE KIT FOR 4709DEN SHOES

370036A - OIL BATH SEAL

370036A

370036A - OIL BATH SEAL

348-4195 - HUB CAP (SENTINAL LARGE DIAM)

348-4195

348-4195 - HUB CAP (SENTINAL LARGE DIAM)

5008414PGBXW - AIR DRYER CARTRIDGE, PURAGUARD

5008414PGBXW

5008414PGBXW - AIR DRYER CARTRIDGE, PURAGUARD

11444 - GLADHAND BRACKET MOUNT

11444

11444 - GLADHAND BRACKET MOUNT

15W40 OIL - 15W40 OIL (ROTELLA) GAL JUG

15W40 OIL

15W40 OIL - 15W40 OIL (ROTELLA) GAL JUG

Brakes & Wheel EndAir SystemFiltrationElectrical & LightingSuspension & SteeringCooling SystemDrivetrainBody & CabExhaust
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Guides from the shop

All guides →
Electrical & Lighting

Trailer ABS Light Won't Go Off? Sensor & Wiring Guide

Trailer ABS light staying on? Step-by-step diagnosis for wheel speed sensors, harness corrosion, and ECU faults before you swap parts.
Aftertreatment & Emissions

DEF Lines Freezing? Winter Prevention & Fixes for Fleets

Stop DEF freezing from parking your trucks. Learn heated-line checks, tank insulation, and SCR fault codes before derates hit.
Trailer & Coupling

Fifth Wheel Not Locking? Diagnosis & Fix Before It Fails

Fifth wheel not locking or slipping under load? Step-by-step diagnosis, lube checks, jaw inspection, and rebuild-vs-replace guidance.

More Isuzu models

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N-Series (NPR / NQR / NRR)

America's best-selling low-cab-forward truck.

F-Series (FTR / FVR)

Cabover medium-duty with a commanding view.

N-Series EV (NRR EV)

Isuzu's first all-electric Low Cab Forward — zero tailpipe, all workhorse.

H-Series (HTR / HVR / HXR)

Isuzu's only conventional cab — a Class 6-to-8 workhorse with a big-truck nose.

Reach

The walk-in delivery van engineered to put more cargo on less fuel.