Bosch 0445120459 Common Rail Injector (0 445 120 459) | OE 13074417 For WEICHAI WP6 – Nozzle DLLA146P2563 / 0433172563

A working diesel doesn't usually fail "all at once." It starts with small combustion irregularities that operators feel before the ECU complains: longer cranking after a hot stop, a rougher idle, smoke under load, or a soft loss of response. On WEICHAI-powered equipment, one of the most searched solutions for these symptoms is the Bosch common rail injector 0445120459 (Bosch No. 0 445 120 459)-often cross-listed by the OEM number 13074417 in online catalogs and parts stores.

Instead of describing 0445120459 as "just a replacement," it's more accurate to call it a combustion reset component. A common rail injector is a precision device that controls how fuel enters the chamber (timing + quantity + atomization). When that precision drifts, everything downstream looks guilty-turbo, EGR, pump-yet the root cause can be one injector no longer delivering repeatable injection events.

Injector number: 0445120459

Bosch number format: 0 445 120 459

OE cross-reference: 13074417 (commonly shown for WEICHAI WP6)

Common application phrasing: "for WEICHAI WP6"

This mapping matters because many buyers don't start with "0445120459"-they start with 13074417, or they search "WP6 injector" and need a clean confirmation path.

 

Multiple supplier listings explicitly position this injector for WEICHAI WP6 engines (often in excavator or industrial equipment contexts).
Some sellers describe it generically as "for Weichai," but WP6 is the recurring, high-intent fitment keyword that buyers use to match quickly.

Fitment best practice: match 0445120459 / 0 445 120 459 and confirm OE 13074417 where your parts list uses OE numbering.

 

To reduce wrong orders, many injector listings publish the related nozzle and valve identifiers used in rebuild channels:

🔧 Nozzle references commonly shown:

DLLA146P2563

0433172563

⚙️ Control valve reference shown in multiple listings:

F 00R J01 692 (F00RJ01692)

These are not "marketing decorations." They help technical buyers confirm they're looking at the correct injector family-especially when the market contains visually similar injectors.

 

 

Common rail systems rely on a closed loop:

ECU target → rail pressure control → injector command → combustion result

When an injector's internal sealing or response time degrades, you can see:

◆ Slower rail stabilization during cranking → longer starts
◆ Return-flow imbalance → rough idle / uneven power
◆ Poor atomization → smoke under load and higher fuel burn

Replacing the correct injector restores repeatable metering, allowing the engine to run the way the calibration expects-especially important on WP6 applications that often work at steady RPM under load.

 

Online listings often publish practical commercial details such as packaging options, origin statements, and warranty periods. For example, supplier pages for this injector family commonly state Made in China / OEM options, and list a 6–12 month warranty depending on seller policy.
Some listings also include typical weight ranges around 600 g net and 650–750 g gross (packaging dependent).

Because seller specs vary, your independent site should present these as supplier-published ranges and encourage confirmation by part number and OE cross-ref.

 

 

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We're here to make your order process worry-free - choose the payment method that works best for you!

 

 

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