Parts for your 2012 Lexus Is-Gas struts

2012 Lexus IS gas struts – are they used on this model?

Based on factory information, gas struts aren’t fitted to the bonnet or boot of the 2012 Lexus IS sedan range (IS 250, IS 350 and IS F). The 2012 Lexus IS Owner’s Manual specifies a bonnet support rod rather than lift struts, and the Lexus service manual/parts catalogue for the XE20 series shows a torsion-bar counterbalance for the boot lid, not gas springs. These are standard Toyota/Lexus design choices for this generation, prioritising packaging, weight, long-term reliability and cost over the added complexity of struts.

What this means for owners is that there’s no “gas strut replacement” needed for the bonnet or boot on these sedans, because those components simply aren’t there. The bonnet is held up by a manual prop rod, and the boot’s opening effort and hold-open function are managed by torsion bars built into the hinge system. If the bonnet feels heavy or the boot doesn’t stay open as it should, the issue is more likely hinge wear, misadjustment, or torsion-bar preload rather than any failed strut.

There is one nuance worth noting: the IS C (convertible) variant uses a complex roof and rear deck mechanism that incorporates assisted lift and control components. These are part of the retractable hard-top system and differ from the typical bonnet/boot gas struts owners might expect to replace. They’re serviceable under roof system procedures rather than treated as simple bolt-on “lift supports”.

For routine servicing on a 2012 Lexus IS sedan, a workshop will typically:

• Inspect the bonnet prop rod, clip and grommet, ensure it locates securely and isn’t bent.
• Check bonnet and boot hinges for play, lubricate hinge pivots and latch/striker with appropriate grease.
• Assess boot torsion-bar tension and hinge alignment if the lid doesn’t hold or pops too aggressively, adjust as per service manual procedure.
• Verify that weather seals aren’t binding and that trim isn’t fouling the boot lid.

Choosing a prop-rod and torsion-bar setup keeps weight down, avoids the ongoing pressure-loss failures seen with ageing gas struts, and reduces cost of ownership. For drivers who prefer hands-free bonnet support, aftermarket conversion kits exist for some models, but any modification should be checked for clearance with the bonnet, guards and wipers, and fitted to existing reinforced mounting points to avoid panel damage.

Technical sources referenced: 2012 Lexus IS Owner’s Manual (bonnet support rod guidance) and Lexus IS (XE20, 2006–2013) service/parts documentation noting boot torsion-bar counterbalance and absence of bonnet/boot gas struts on sedan/IS F models.

FAQs

Does a 2012 Lexus IS have gas struts on the bonnet or boot?
No. The 2012 IS sedan and IS F use a bonnet prop rod and a boot torsion-bar system, not gas struts. If the bonnet or boot feels heavy or won’t stay put, inspection focuses on hinges, latch adjustment and torsion-bar preload rather than replacing lift supports.

What should be serviced if there are no gas struts?
Have the bonnet prop rod, clip and hinges checked and lubricated, plus the boot hinges, latch and torsion-bar setup. Correct lubrication and alignment often restores smooth, safe operation without parts replacement.

Does the IS C (convertible) use gas struts?
The IS C’s retractable hard-top and rear deck use assisted mechanisms that differ from simple bonnet/boot gas struts. Servicing follows roof-system procedures and typically isn’t a DIY swap like common lift supports.