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Zexel 109341-1040 is the Bosch VP44 type radial piston distributor pump with the drive gear fitted: alloy body with the electronic control unit and its plug, four high pressure outlets, fuel inlet and return fittings and the timing gear on the drive shaft. It is used on Isuzu 4JH1-TC engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Zexel 0470504045 and Isuzu 8-97377520-2.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Injection Pump |
| Replaces | Bosch 0470504045 |
| Engine | Isuzu 4JH1, 4JH1-TC 3.0 L |
| Vehicle | Isuzu D-Max, TFR, TFS |
| Type | Radial piston distributor pump (Bosch VP44) |
| Cross references | Zexel 109341-1040, Isuzu 8-97377520-2 |
| Fits | Isuzu 4JH1 and 4JH1-TC 3.0 L diesel engines in the Isuzu D-Max, TFR and TFS |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Bosch Part No.(SPM Part No.) | Fits |
|---|---|
| 0470504045(SPM-HEP-5144) | Isuzu 4JH1 and 4JH1-TC 3.0 L diesel engines in the Isuzu D-Max, TFR and TFS |
| 109341-1040(SPM-HEP-5144) | Isuzu 4JH1 and 4JH1-TC 3.0 L diesel engines in the Isuzu D-Max, TFR and TFS |
| 8-97377520-2(SPM-HEP-5144) | Isuzu 4JH1 and 4JH1-TC 3.0 L diesel engines in the Isuzu D-Max, TFR and TFS |
Hard starting and low power
A worn injection pump delivers less fuel at lower pressure: long cranking and weak power under load.
Smoke and uneven running
Uneven delivery between cylinders shows as smoke and rough running.
Fuel leaks
Leaks from the pump body or shaft seal mean it is time to replace it.
Fitting tips
Set the pump timing to the engine maker's figure, bleed the fuel system, and use clean fuel and new filters.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 1,121.16 | 2 Nov 2026 |
| eBay, aftermarket seller | USD 1,309.91 | 2 Nov 2026 |
| YEM Parts | USD 1,406.90 | 2 Nov 2026 |
| Spare Part Mart | USD 671.36 | Today |
Our price of USD 671.36 is 40% to 52% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Isuzu 4JH1, and 3 more listed under compatible equipment. Check the old fuel injection pump is marked 109341-1040 or one of the cross references, because makers change parts between serial ranges.
On the Isuzu 4JH1, often 5,000 to 10,000 hours with clean fluid, much less with dirt or air in the system. It is usually changed on condition, not by hours.
Leaks from the seal or weep hole, noise or whining, overheating, or falling pressure or flow under load.
Clean them right back to metal and fit the new gasket or O-ring dry, unless the engine manual calls for sealant.
Yes. Fill the pump and its suction line with clean fluid before the first start. Running it dry, even for a few seconds, can score it.
No. It is an aftermarket fuel injection pump made to replace the Zexel 109341-1040. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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