Catalog

VOLVO 21545138 FUEL PUMP

VOLVO 21545138 FUEL PUMP

Product Specifications

Product quality
OEM Equivalent Grade
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On request
bolt MOQ (Minimal order)
1 pcs
local_shipping Production time
30-45 days
package_2 Shipping Weight: —
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VOLVO 21545138
VOLVO 21608511
Overview & Operating Principle
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The FUEL PUMP is an electrically driven positive-displacement pump submerged in the fuel tank that draws fuel from the tank and delivers it to the fuel rail at regulated pressure — typically 3.0–6.5 bar depending on system design. The pump consists of a DC electric motor driving an impeller or roller-cell pumping element, a check valve to maintain residual line pressure after shutdown, and a pressure relief valve to protect the fuel system from overpressure. On returnless fuel systems the pump operates at variable speed controlled by the ECU; on return-type systems it runs at fixed speed with excess fuel returned to the tank via a pressure regulator.

This unit — VOLVO 21545138 — is manufactured to OEM-equivalent specifications: flow rate (L/h), operating pressure, current draw, inlet and outlet port dimensions, and connector pinout are matched to the original part. Supplied as a direct drop-in replacement requiring no fuel system modification for standard fitment. Available wholesale from 0.18 USD, MOQ 1 pcs, production lead time 30-45 days.

Fuel pumps wear gradually through impeller erosion, brush wear in the motor, and contamination from tank sediment. Running the tank repeatedly below one quarter causes the pump to run hot — the fuel itself provides cooling and lubrication. Before condemning the pump, verify fuel pressure at the rail with a gauge and check the pump relay and fuse, as electrical faults account for a significant proportion of apparent pump failures.

Symptoms & Diagnostics
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Hard start or extended cranking before the engine fires — residual fuel pressure has bled down due to a failed check valve or the pump is slow to prime on startup.
Engine stalling or cutting out under load or at high speed — the pump cannot maintain adequate flow rate at high demand; fault codes P0087 (fuel rail pressure too low) or P0190 may be present.
Loss of power, hesitation, or flat spots during acceleration — intermittent pressure drop caused by a partially failed pump or clogged fuel filter starving the pump.
Whining, humming, or grinding noise from the fuel tank area — worn pump motor bearings or impeller damage; noise typically increases with engine load.
Engine runs normally at idle but misfires or cuts out at high RPM — the pump can maintain low-demand pressure but fails to deliver adequate volume under full load.
No-start condition with no fuel pressure at the rail — confirm by checking the pump relay, fuse, and wiring before replacement; a failed relay is the most common cause of zero fuel pressure.
Logistics & Customs
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International HS Code
8413.30
EAEU Customs Code (TN VED)
8413 30 200 0
Typical Net Weight
Country of Manufacture
China
Standard MOQ
1 pcs
Production Lead Time
30-45 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
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  1. Depressurise the fuel system before opening any fuel line. Locate and remove the fuel pump fuse or relay, crank the engine until it stalls, then crank again to bleed residual pressure. Disconnect the negative battery terminal before proceeding.
  2. Access the fuel pump via the inspection hatch under the rear seat or boot floor where fitted, or by dropping the fuel tank. Clean the area around the pump flange with a damp cloth before removal to prevent debris entering the tank.
  3. Remove the pump locking ring using a fuel pump spanner (typically 6- or 8-tab) turned counter-clockwise. Note the orientation of the pump and sender unit before extraction — the arrow or notch on the flange must align with the mark on the tank on reinstallation.
  4. Extract the pump assembly carefully to avoid bending the float arm. Drain residual fuel from the pump module into a suitable container. Inspect the tank interior for sediment or debris — heavy contamination requires tank cleaning before fitting the new pump.
  5. Transfer the fuel sender float arm to the new pump module if the replacement is supplied as a pump element only. Fit a new O-ring or gasket to the pump flange — never reuse the old seal.
  6. Install the new FUEL PUMP (VOLVO 21545138), align the orientation mark, torque the locking ring to specification (typically 60–90 Nm), reconnect the fuel lines and electrical connector, reinstall the fuse or relay, and start the engine. Check for fuel leaks at the flange and all disturbed connections before returning the vehicle to service.
Tools: fuel pump spanner set, fuel pressure gauge, suitable fuel container, new flange O-ring, torque wrench, battery disconnect tool.
Frequently Asked Questions
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Should the fuel filter be replaced at the same time as the fuel pump?
Yes, always. A clogged fuel filter is a leading cause of premature pump failure — it forces the pump to work against excessive resistance, accelerating wear. On vehicles with an in-tank filter integrated into the pump module, the filter is replaced as part of the assembly. On vehicles with an external inline filter, replace it simultaneously. ok.parts supplies fuel pump assemblies and filter elements at wholesale MOQ from 0.18 USD per unit.
Is ECU adaptation or fuel system priming required after replacing the fuel pump?
No ECU coding is required. After installation, cycle the ignition key to the ON position (without cranking) 3–5 times for 5 seconds each cycle to allow the pump to prime the fuel lines before starting. On vehicles with returnless fuel systems and variable-speed pump control, the ECU will automatically calibrate pump speed during the first drive cycle.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
PartReason for Combined Replacement
Fuel Filter
OEM ref. varies by application		A restricted fuel filter is the most common cause of premature pump failure. Always replace the filter when fitting a new pump — installing a new pump behind a clogged filter will shorten the life of the replacement significantly.
Fuel Pump Relay
OEM ref. varies by vehicle		A failing relay causes intermittent pump operation and is frequently misdiagnosed as pump failure. Replace the relay as a matter of course when the pump is changed — it is a low-cost item that eliminates a common source of repeat faults.
Fuel Tank Flange O-Ring / Gasket
Application-specific		The pump flange seal is compressed and heat-cycled during its service life and will not seal reliably if reused. Always fit a new O-ring or gasket when the pump is removed — a fuel leak at the tank flange is a serious fire hazard.