Parts for your 2007 Mitsubishi Lancer-Power steering hose

2007 Mitsubishi Lancer power‑steering hose: do you actually have one?

Short answer: it depends on which 2007 Lancer you’ve got. Technical references used by workshops – the Mitsubishi ASA/CAPS parts catalogue and factory service manuals – show that the CH-series Lancer (sold in AU/NZ up to around mid‑2007, with 4G9x/4G69 engines) uses a conventional hydraulic power steering system with a high‑pressure hose and a low‑pressure return hose. The later CJ-series Lancer (launched late 2007 in AU/NZ, 4B11 engine) switched to electric power steering (EPS), which doesn’t use hydraulic hoses at all. That’s why some 2007 cars have hoses and others don’t. If your build plate/VIN tags it as CH, you’ve got hoses, if it’s a CJ, you don’t.

For CJ owners: an electric motor on the steering column provides assist, so there’s no pump, fluid, reservoir or hoses to leak. EPS trims weight and maintenance, and improves efficiency. If there’s a steering concern on a CJ, techs look at the EPS column, sensors, wiring and ECU rather than any hydraulic plumbing.

If your 2007 Lancer is the CH (hydraulic assist), the power‑steering hoses are doing plenty of heavy lifting. The high‑pressure hose takes fluid from the engine‑driven pump to the steering rack, while the return hose sends it back to the reservoir. Together they deliver the assist that makes parking light and cornering steady, with the right feel through the wheel.

Over time, heat, vibration and exposure can harden rubber sections, weep at crimps, or fatigue metal lines. Common signs of hose trouble include a light oil mist or drips under the front left, a whining pump on lock, heavier steering at low speeds, or a burnt‑ATF smell after a drive. Left alone, leaks can drop fluid level, aerate the system and wear out the pump and rack.

On servicing, it’s smart to inspect the hoses every service interval – look for damp spots, swelling, cracks and chafe points. If replacing, go for an OEM‑quality hose, renew copper sealing washers/O‑rings at banjo fittings, and don’t reuse crushed washers. After fitment, refill with the correct Mitsubishi‑approved power steering fluid (check the cap/owner’s manual), bleed the system by turning lock‑to‑lock with the front wheels off the ground, and recheck the level once it’s quiet and bubble‑free. A quick clean of the area before and after helps spot any fresh weeps. Also check the reservoir filter screen, hose clamps on the return line, and belt condition/tension – fluid on a belt can make it squeal and slip.

There’s no fixed replacement interval for a CH hose – condition dictates timing – but once a hose starts sweating or the outer cover cracks, it’s cheaper to sort it before it takes out a pump. A proper job includes torqueing fittings to spec from the workshop manual and a road‑test to ensure steering feel is consistent with no assist lag or noise.

• How can I tell if my 2007 Lancer is CH (hydraulic) or CJ (electric)?
• What fluid should be used after replacing a CH Lancer power‑steering hose?
• Is it safe to drive a CH Lancer with a slight power‑steering hose leak?

How can I tell if my 2007 Lancer is CH (hydraulic) or CJ (electric)?
Check the build plate and model code: CH cars commonly ran up to mid‑2007, CJ launched late 2007. Pop the bonnet – CH has a belt‑driven pump, reservoir and hoses going to the rack. CJ has no pump or reservoir and features an electric column assist unit inside the cabin. Your rego/parts supplier can confirm by VIN.

What fluid should be used after replacing a CH Lancer power‑steering hose?
Use the Mitsubishi‑approved power steering fluid specified on the reservoir cap or in the owner’s manual. Don’t mix fluid types. After refilling, bleed the system properly and recheck the level once any foaming settles.

Is it safe to drive a CH Lancer with a slight power‑steering hose leak?
Not recommended. Small weeps tend to worsen, and low fluid can quickly damage the pump and rack. If you must move it, monitor the level closely and avoid long drives or full‑lock manoeuvres, then get the hose repaired or replaced promptly.