Parts for your 2008 Lexus Is-Gas struts

2008 Lexus IS gas struts — what they do and when to replace them

For the 2008 Lexus IS (XE20 series), gas struts are relevant and factory-fitted on the boot lid. Lexus/Toyota Electronic Parts Catalogue listings for the IS250/IS350/IS F show two boot lid lift supports (often labelled as trunk lid stay/damper assemblies), while the bonnet uses a manual prop rod from factory. The Lexus IS Repair Manual (Body – Trunk Lid section) covers removal/installation of the boot lid damper, and major aftermarket application guides (e.g., Stabilus, Monroe/StrongArm) list direct-fit boot struts for this model. So, gas struts are part of the 2008 IS—just not on the bonnet from OEM.

On the IS, the boot gas struts make everyday use easier and safer. They help lift the boot smoothly and hold it open without fuss, so there’s no wrestling with shopping or luggage. Being nitrogen‑charged dampers, they deliver controlled movement both up and down, protecting hinges and panels from slamming, even in windy conditions.

There isn’t much day‑to‑day maintenance for gas struts, but they should be inspected as part of regular servicing. Look for oily weeping around the shaft seals, listen for a faint hiss during movement, and check for slow opening, uneven lift, or a boot that won’t stay up—especially in colder weather, which can expose weak struts. If any of these show up, it’s time for replacement.

Replacement is straightforward and best done in pairs so the lift and hold forces stay balanced. Always support the boot securely (a helper or a prop) before removing a strut. Pop the spring clips at each end with a small flat screwdriver, ease the old strut off its ball studs, then click the new one into place with the shaft pointing down during storage/fitment. Don’t grease the chrome shaft—lubricants attract grit and damage the seals. Just keep it clean and free of nicks.

Quality matters. Choose OE or OE‑equivalent units with the correct force rating for the 2008 IS sedan. Cheap, over‑gassed struts can slam the lid open, under‑gassed ones won’t hold properly. Most owners can expect 5–10 years of service life, though harsh sun and heat can shorten that. The job typically takes 10–20 minutes and makes a big difference to daily usability and safety.

• Common signs they’re due: boot won’t stay up, slow or jerky opening, visible oil on the shaft, or needing a hand to lift.

While the bonnet uses a prop rod from factory, bonnet gas‑strut conversion kits are available aftermarket if hands‑free lifting is wanted.

FAQs

Does the 2008 Lexus IS bonnet have gas struts?
Factory cars use a prop rod for the bonnet. Owners who prefer hands‑free lifting can fit an aftermarket bonnet strut kit designed for the XE20 IS.

How long do the boot gas struts last on a 2008 Lexus IS?
Typically 5–10 years. Heat, UV, and frequent use can shorten that. If the boot sags or won’t stay up, replace them.

Can only one boot strut be replaced?
It’s possible, but not recommended. Replacing in pairs keeps the boot balanced and ensures consistent opening and holding force.