Parts for your 2007 Mitsubishi Lancer-Oil seals

2007 Mitsubishi Lancer oil seals — what they do and when to sort them

Oil seals are absolutely relevant on the 2007 Mitsubishi Lancer. Technical references including the Mitsubishi Lancer Workshop Manual (CH/CJ series: Engine, Manual/Auto Transaxle sections), the Mitsubishi ASA electronic parts catalogue, and the Haynes Repair Manual (Mitsubishi Lancer 2002–2011) all specify multiple oil seals fitted to these cars — notably the crankshaft front and rear main seals, camshaft seals (engine-dependent), and transaxle driveshaft/output seals. So yes, this Lancer runs a host of oil seals to keep fluids in and contaminants out.

On a 2007 Lancer, oil seals do the quiet, messy work. Engine seals keep engine oil from sneaking past the crank and cams, gearbox and transaxle seals stop gear oil or ATF leaking where the driveshafts slide in. Most Aussie and Kiwi 2007 Lancers are front-wheel drive, so expect left and right driveshaft seals at the transmission, AWD variants add differential/transfer seals.

There’s no set replacement interval — seals are changed on condition. Heat, age, kilometres, and crankcase pressure wear them out. A tidy servicing routine helps: check for dampness around the crank pulley, timing cover, bellhousing area (rear main), and where the shafts enter the gearbox. Keep PCV and breathers clear, avoid overfilling oil or ATF, and use the correct spec fluids.

• Common clues it’s time: oil mist on the timing cover, drops under the bellhousing, clutch slip from a rear main leak, or trans fluid weeping at the inner CVs.
• Handy tips during replacement: inspect shaft surfaces for grooves, lightly lube the new seal, drive it square with the right tool, and verify breather/PCV function to prevent repeat leaks.

Job difficulty varies. Front crank and driveshaft seals are mid-level with the right tools, the rear main is a bigger undertaking that usually means gearbox out (manual) or separating the trans (auto). When driveshaft seals leak, it’s smart to replace both sides and refresh the gearbox oil or ATF. Quality matters — genuine or reputable aftermarket seals tend to last longer.

As part of regular servicing in Australia and New Zealand, a quick seal inspection every 10,000–15,000 km keeps small seeps from becoming big repairs. If there’s any doubt, a licensed technician can confirm which seal is weeping before parts and labour stack up.

• Which oil seals most commonly leak on a 2007 Lancer?
• Is it safe to keep driving with a rear main seal leak?
• What does it cost to replace a driveshaft (axle) oil seal on a 2007 Lancer?

Which oil seals most commonly leak on a 2007 Lancer?
Typically the front crank seal, cam seals (on engines that use them), and the transaxle driveshaft/output seals. Age and heat harden the rubber, and a worn PCV can raise crankcase pressure, pushing oil past lips that used to seal fine. A quick look around the crank pulley, timing cover, and the gearbox where the shafts enter will usually spot the culprits.

Is it safe to keep driving with a rear main seal leak?
It might manage short trips, but it’s not ideal. On manuals, oil can contaminate the clutch, causing slip. On autos, significant engine oil loss is the bigger worry. Minor weeps can be monitored, but if there are drips on the driveway or a burnt-oil smell, it’s time to book it in before the leak escalates.

What does it cost to replace a driveshaft (axle) oil seal on a 2007 Lancer?
In Australia/New Zealand, parts are usually $30–$90 per seal, with 1–2 hours labour per side depending on model and corrosion. Ballpark fitted prices land around $200–$500 per side. Many workshops recommend doing both sides and renewing the gearbox oil or ATF at the same time.