Parts for your 2017 Toyota Mark x-Oil pump

2017 Toyota Mark X oil pump — what it does and how to look after it

Technical sources confirm the 2017 Toyota Mark X definitely uses an engine oil pump. Toyota’s Repair Manual for the GRX130 series (Engine Mechanical and Lubrication sections), the New Car Features (NCF) document for the 4GR‑FSE/2GR‑FSE V6, and the Toyota Electronic Parts Catalogue all show a crankshaft‑driven trochoid (gerotor) oil pump integrated with the front timing chain cover, complete with a pressure relief valve and pickup to the sump.

On the Mark X’s GR‑series V6, the oil pump’s job is to pull oil from the sump, pressurise it, and feed the main galleries, bearings, timing chain, and VVT‑i cam phasers. Without steady pressure and flow, the engine would wear fast, the chain could get noisy, and variable valve timing would play up. Because the pump is driven directly off the crank, output closely tracks engine speed, and the built‑in relief valve keeps pressure in check.

In normal servicing, the oil pump isn’t a routine replacement item. What matters most is fresh, correct‑grade engine oil and quality filters at the factory interval. The GR V6 typically specifies low‑viscosity ILSAC oil (often 0W‑20, some owners in hotter Aussie/Kiwi climates use 5W‑30 if allowed by the handbook). Sticking to the schedule, using reputable filters, and keeping the sump pickup clean will do more for pump life than anything else.

Replacement is usually only considered when there’s verified low oil pressure or pump wear. Because the pump is part of the front cover, it’s a decent job: front accessories off, timing cover off, and careful reassembly with new seals, O‑rings, and form‑in‑place gasket. The pump should be primed with clean oil, clearances checked against the Repair Manual, and the engine filled with the correct oil before first start. On a Mark X, this is typically doable with the engine in the car, but labour time is significant.

Owners and techs keep an eye out for:

• Oil pressure warning light or verified low pressure on a mechanical gauge
• Cold‑start chain rattle, noisy valvetrain, or VVT‑i faults (e.g., P0520, P001x)
• Sludge or a hardened pickup O‑ring causing aeration

Good habits—gentle warm‑ups, quality oil, fixing leaks promptly, and a clean PCV system—help the pump and the whole GR V6 go the distance.

Popular questions

What oil grade best protects the oil pump on a 2017 Mark X?
For most cars, 0W‑20 meeting the correct ILSAC/API spec is the factory pick. In hotter parts of Australia or New Zealand, some workshops use 5W‑30 where the owner’s manual permits. The key is sticking to the service interval with a good filter—pressure stability matters more than chasing thicker oil.

How can someone tell if the oil pump needs replacing?
Don’t guess—test. If the oil light flickers or there’s top‑end noise, a technician will verify pressure with a mechanical gauge, check for fault codes, and inspect for sludge or a leaking pickup O‑ring. Only when pressure is low with the right oil and a sound pickup does a pump replacement make sense.

Can the oil pump be changed without removing the engine?
On the Mark X V6, yes in most cases—but it’s a front‑of‑engine teardown. Radiator and ancillaries come off, timing cover is removed, then the pump is serviced. It’s a sizeable job best left to a workshop with the Toyota Repair Manual on hand.