Parts for your 2013 Toyota Mark x-Fuel pump

2013 Toyota Mark X Fuel Pump — What It Does and How to Look After It

Yes, the 2013 Toyota Mark X absolutely uses a fuel pump. In fact, it runs a two‑stage setup on its D-4S petrol V6s (4GR-FSE 2.5L and 2GR-FSE 3.5L): an in‑tank electric low‑pressure pump and an engine‑mounted high‑pressure pump. This is documented in Toyota’s GRX130 Repair Manual (Fuel – Fuel Pump Control), the New Car Features guide for the D‑4S system (covering the 4GR‑FSE/2GR‑FSE), and the Toyota EPC, which lists the in‑tank fuel pump assembly for this model.

The in‑tank pump lifts petrol from the tank and feeds it at steady low pressure to the engine. The high‑pressure pump, driven off the camshaft, then ramps it up to the serious pressures needed for direct injection, while the system also supplies the port injectors. Together they make sure the Mark X fires up cleanly, pulls hard through the revs, and keeps emissions in check.

There’s no fixed service interval for the pumps, but a bit of care goes a long way. Keep at least a quarter‑tank of fuel to help cool the in‑tank pump, stick to quality fuel (E10 is fine for these engines), and avoid running it dry. If the in‑tank module ever comes out, replace the tank seal/gasket and the strainer, and double‑check all O‑rings on refit. For the high‑pressure pump, use new sealing washers and torque to spec to prevent leaks.

• Common signs it’s time to check the fuel pump(s): hard starting, flat spots on acceleration, louder whine from the tank area, misfires under load, poor fuel economy, or fault codes like P0087 (fuel rail pressure too low) and lean mixture codes.
• Replacement notes: safely depressurise the fuel system, disconnect the battery, and work in a well‑ventilated space. The in‑tank module is accessed under the rear seat, expect roughly 1.5–2.5 hours. The cam‑driven high‑pressure pump swap is quicker but demands care with cleanliness and sealing.
• Good practice: pair a suspect pump with a fresh filter/strainer, inspect the fuel lines, and verify fuel pressure with a scan tool after the job.

Look after the Mark X’s fuel pumps and the V6 will keep its smooth, punchy behaviour for many more kilometres.

Popular questions

Does the 2013 Mark X have one or two fuel pumps?
The D‑4S system uses two: an in‑tank electric low‑pressure pump and a cam‑driven high‑pressure pump on the engine. The pair work together to supply both the port and direct injectors with the right pressure at the right time.

What are the tell‑tale symptoms of a failing fuel pump on a Mark X?
Long cranking, hesitation on hills, a louder humming from the tank, and intermittent stalling are common. Scan results may show lean codes or low rail pressure. Always rule out a clogged strainer or contaminated fuel before condemning the pump.

Is the fuel filter serviceable separately?
On the GRX130, the primary filter/strainer is integrated with the in‑tank pump module. It’s typically replaced with the module or serviced when the module is out. It isn’t listed as a routine service item unless there are drivability issues.