Parts for your 2019 Subaru Impreza-Oil pump

2019 Subaru Impreza Oil Pump — What It Does and How To Look After It

Technical sources confirm the 2019 Subaru Impreza absolutely uses an oil pump. The Subaru Factory Service Manual (FB20 engine, Lubrication section) details a crankshaft-driven, trochoid-type oil pump integrated into the front timing chain cover, and Subaru’s genuine parts catalogue lists an “Oil Pump Assembly” for this model. That makes the oil pump very much relevant to this vehicle.

On the 2019 Impreza, the oil pump’s job is to pull oil from the sump, pressurise it, and push it through the galleries to critical components like the crankshaft and camshafts, and to support the variable valve timing system. Because it’s driven directly by the crank, it reacts instantly to engine speed, maintaining stable pressure across the rev range. Without it, bearings would run dry, cams would scuff, and the engine would quickly cry enough.

This pump isn’t a routine “replace-at-X-kilometres” item, it’s designed to last the life of the engine. The best “maintenance” for the pump is simply sticking to the scheduled services and using the right oil. For Aussie and Kiwi owners, that means regular changes (around every 12,500 km or 12 months per Subaru’s schedule) with quality oil meeting the spec Subaru calls for (commonly 0W-20 meeting API SN or SP) and a good filter. Clean oil protects the pump’s tight internal clearances and keeps the pressure relief valve behaving.

• Watch for red flags: low oil pressure warning, persistent rattles on start-up, VVT-related fault codes, or a verified low reading on a mechanical gauge.
• Check the basics first: correct oil level, condition, and any leaks at the front cover.

If replacement is genuinely needed, it’s a job for a well-equipped workshop. The pump is part of the timing chain cover assembly, so the crank pulley and front cover must come off, sealant surfaces must be cleaned perfectly, and the new pump and cover sealed with the correct FIPG/RTV. The pump should be pre-lubed (“primed”) with fresh oil before reassembly, and torque specs followed to the letter. Because low pressure can also come from worn bearings, a cracked pickup, or a hardened pickup O-ring, a proper diagnosis (including a mechanical oil pressure test) is essential before swapping parts.

Look after the oil, fix leaks promptly, and the 2019 Impreza’s oil pump will usually keep doing its thing quietly in the background for years of hassle-free motoring.

Popular questions

Does the 2019 Subaru Impreza have an oil pump?

Yes. Technical documentation, including the Subaru Factory Service Manual for the FB20 engine (Lubrication section) and Subaru’s parts catalogue, specifies a crank-driven trochoid oil pump integrated with the timing chain cover. It’s a core part of the engine’s lubrication system.

When should the oil pump be replaced on a 2019 Impreza?

It isn’t a scheduled replacement item. Consider replacement only after confirmed low oil pressure and proper diagnosis. Many “low pressure” issues are caused by worn bearings, a leaking pickup O-ring, blocked strainer, incorrect oil grade, or a failing pressure relief valve. A mechanical gauge test and inspection should come first.

What maintenance helps the oil pump last?

Regular services using the correct oil grade and a quality filter, keeping an eye on leaks, and investigating any oil warning light immediately. Clean, correct oil and timely changes are the main things that protect the pump and the rest of the lubrication system.