Parts for your 2013 Lexus Is-Fuel pump

2013 Lexus IS fuel pump — what it does and how to look after it

Yes, a fuel pump is absolutely relevant on a 2013 Lexus IS. Factory Lexus repair manuals for the 2013 IS250/IS350 and IS F describe an in‑tank electric low‑pressure fuel pump that feeds a cam‑driven high‑pressure fuel pump as part of Toyota’s D‑4S fuel system. The Toyota Electronic Parts Catalogue also lists the “Fuel Suction Tube with Pump and Gauge Assembly” for these models, and Lexus safety recall campaigns relating to Denso low‑pressure pumps included certain 2013 IS variants. All of that confirms the car is fitted with fuel pumps from the factory.

On this model, the in‑tank pump lifts petrol from the tank and sends it forward at low pressure, while the engine‑mounted high‑pressure pump (HPFP) ramps pressure for the direct injectors. Together they keep fuel delivery stable across hot starts, long hill climbs, and quick overtakes — exactly what an IS owner expects. When either pump is tired, the car can feel flat, stumble under load, or take longer to crank. Left too long, it can strand the driver.

There’s no scheduled replacement interval for the fuel pump on a 2013 IS, it’s a “replace on condition” item. During regular servicing, a shop should listen for an abnormally loud in‑tank pump prime, check live fuel trims and pressure (low‑side and, if equipped and safe to test, high‑side), and scan for related fault codes. Because the in‑tank assembly integrates the strainer, most repairs involve replacing the complete module rather than just a filter.

• Good practice during service:
  • Use quality 95/98 RON petrol to minimise deposits in the HPFP and injectors.
  • Keep the tank above a quarter to help cool the in‑tank pump.
  • Inspect wiring, connectors and the pump control circuit if there’s intermittency.

When replacement is needed, a competent technician will safely depressurise the system, disconnect the battery, and take care with the tank seal and locking ring. Genuine or high‑quality OEM pumps tend to be quieter and last longer, and new sealing gaskets are a must to avoid fumes. After refit, priming the system, clearing codes, and a hot road test under load helps verify proper operation. For IS F and the FSE V6 models, remember there are two pumps in the system — if drivability issues persist after an in‑tank swap, testing the HPFP and its control should be next on the list.

• Does the 2013 Lexus IS have one or two fuel pumps?
  Most ANZ petrol variants (IS250, IS350, IS F) use two: an electric in‑tank low‑pressure pump and a cam‑driven high‑pressure pump for the D‑4S injection. Both must be healthy for smooth performance and easy starts.
• What are common signs the fuel pump is failing?
  Longer cranking, hesitation under load, loud humming from the tank, surging at steady cruise, or fault codes for lean operation or fuel pressure. If it feels fuel‑starved climbing a hill, get the pumps tested.
• Is the fuel filter serviceable on its own?
  On most 2013 IS petrol models the primary filter/strainer is part of the in‑tank pump module. It’s typically replaced with the assembly. The HPFP and injectors have fine screens that aren’t routine service items.