Parts for your 2006 Toyota Highlander-Manifold gasket

2006 Toyota Highlander (Kluger) manifold gasket — purpose, servicing tips, and when to replace

Yes, a manifold gasket is fitted to the 2006 Toyota Highlander (Kluger). Toyota’s Factory Service Manual (TIS) for both engines offered that year—the 2.4L 2AZ-FE and 3.3L 3MZ-FE—details intake and exhaust manifold gaskets, including removal, installation and torque specs. The Toyota Electronic Parts Catalog (EPC) also lists the intake manifold gasket (and upper plenum gaskets on the V6) plus the exhaust manifold gasket as serviceable parts for this model. So it’s very much a relevant item on this vehicle.

On this Highlander/Kluger, the manifold gasket’s job is simple but critical. On the intake side, it seals the manifold to the cylinder head (and on the V6, the upper plenum to the lower manifold), keeping unmetered air out so the engine runs smoothly and fuel trims stay happy. On the exhaust side, it keeps hot gases sealed in the manifold, protecting nearby components, preventing that annoying ticking on cold start, and ensuring the oxygen sensors get clean, accurate readings.

When it’s time for servicing, manifold gaskets don’t have a fixed replacement interval, they’re replaced when disturbed or when symptoms show. Common red flags include:

• Rough idle, hiss under the bonnet, or lean codes (like P0171) — intake leak
• Ticking/raspy note on cold start, soot marks at the flange, exhaust smell — exhaust leak
• Poor fuel economy or a whiff of fumes in the cabin

Practical advice for this model: if the V6 3MZ-FE’s upper intake plenum is coming off for rear spark plugs, fit new plenum gaskets at the same time. On the 2AZ-FE, replacing the intake gasket when the manifold is removed for EGR or throttle body work is cheap insurance. For the exhaust side, any time the manifold is off, use a quality OEM-style multi-layer or graphite gasket and check the studs and nuts for corrosion.

• Always clean mating faces without gouging the alloy, no extra sealant unless the manual specifies it.
• Follow the factory tightening sequence and torque values to avoid warping.
• After intake work, reset fuel trims by clearing codes or disconnecting the battery, then check for vacuum leaks.
• After exhaust work, recheck fasteners once heat-cycled and listen for a cold-start tick.

Done right, fresh manifold gaskets help the 2006 Highlander/Kluger run quieter, cleaner and more efficiently for many more kilometres.

Does the 2006 Toyota Highlander/Kluger have intake and exhaust manifold gaskets?

Yes. Both the 2.4L 2AZ-FE and 3.3L 3MZ-FE engines use intake manifold gaskets (and plenum gaskets on the V6) plus exhaust manifold gaskets. This is documented in Toyota’s service manual and parts catalog for the 2006 model.

How often should manifold gaskets be replaced on this model?

There’s no set interval. Replace them when the manifold is removed, or if there are symptoms like rough idle, lean codes, or an exhaust tick. Many owners fit new plenum gaskets on the V6 when doing rear bank spark plugs as good practice.

What does manifold gasket replacement typically cost?

Parts are usually affordable: intake/plenum gasket sets often range from modest pricing, while exhaust gaskets are similarly priced. Labour varies with engine and job scope—an intake/plenum reseal can be around 1–3 hours on the 4‑cyl and 2–4 hours on the V6, exhaust manifold work can run longer if studs are seized. Local rates and vehicle condition will determine the final figure.