Parts for your 2012 Mitsubishi Lancer-Oil pump

2012 Mitsubishi Lancer Oil Pump — Purpose, Servicing and Replacement

Yes, the 2012 Mitsubishi Lancer is fitted with an engine oil pump. Technical sources including the Mitsubishi Lancer factory service manual (Engine: Lubrication section), the Mitsubishi ASA/parts catalogue (which lists an Oil Pump Assembly for the 4B11 2.0L and 4B12 2.4L engines), and mainstream workshop guides such as the Haynes Mitsubishi Lancer 2007–2017 manual all confirm a crankshaft-driven, internal oil pump located behind the front (timing) cover.

On this Lancer, the oil pump’s job is simple but critical: it pressurises and circulates engine oil through galleries to the crankshaft, camshafts, balance of the valve gear, and timing components. It’s a compact trochoid/gerotor-style pump spun directly by the crank, so oil pressure builds as revs rise. Without it, bearings starve, metal rubs metal, and the engine will quickly cry enough.

There’s no scheduled replacement for the oil pump, but keeping it happy is part of smart servicing. Stick to quality oil and filters, follow the service intervals, and use the grade recommended in the owner’s handbook (often 5W-30 or 0W-20 depending on engine and climate). Clean oil protects the pump’s tight internal clearances and helps maintain stable pressure, especially on hot summer days across Aus or NZ.

• Watch for the red oil pressure warning lamp, rattly starts, or ticking from the top end.
• If the sump has been off, make sure the pickup screen is spotless and O-rings are fresh.
• A mechanical gauge test is the proper way to confirm oil pressure if there’s any doubt.

Replacing the pump is a bigger job because it lives behind the front cover. Expect to remove the drive belt and crank pulley, support the engine, take off the timing cover, and handle the timing chain correctly. A competent tech will prime the new pump with clean oil, renew seals, apply the correct RTV to the front case, and torque everything to spec from the service manual. It’s a good moment to inspect the timing chain guides, crank seal, and oil control valve screens as well.

Note: Variants like the Lancer Evolution X (4B11T) and CVT-equipped models still use an engine oil pump, the transmission’s separate pump doesn’t change the need for proper engine oil pressure and maintenance practices.

Popular questions about 2012 Mitsubishi Lancer oil pumps

Does the 2012 Lancer have an oil pump I need to service?
Yes. It’s an internal, crank-driven pump. There’s no fixed replacement interval, but regular oil and filter changes, plus checking any oil pressure warnings promptly, is the way to look after it. If pressure is low or the pump is noisy, testing and possible replacement are on the cards.

What are the signs the oil pump might be failing?
Common clues include the red oil light flickering at hot idle, lifter/cam ticking, or brief rattle on start-up that doesn’t improve with the right oil. A pressure test with a gauge confirms the diagnosis before diving in.

Can a home mechanic replace the oil pump on a Lancer?
It’s doable for experienced DIYers with the right tools, but it’s not a quick driveway job. You’ll need to pull the front cover, manage the timing chain, re-seal the case, and prime the pump. Many owners prefer a professional to avoid leaks or timing issues.