Product Overview

The gas strut, OEM number 99151255100, is the rear engine lid lift support fitted to the Porsche 911 (991), Coupe and Cabriolet, model years 2012-2016, without spoiler package. This part is typically sold and installed as a pair, and given how many 911 owners keep these cars in long-term service, it's a steady part to stock for anyone servicing Porsche 911s of this generation.

Worn or failing units typically show up as an engine lid that won't stay open on its own, feels heavy or sags, or drops unexpectedly during inspection or maintenance access. GSK Auto manufactures this gas strut to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

99151255101, 991512551, PM3404

(Confirm against your VIN or chassis code before ordering - this strut is for 991 models without the spoiler package, and is typically sold and installed as a pair, so it's worth confirming spoiler equipment and quantity needs before shipping.)

What Is a Gas Strut?

Function: The gas strut, also called a lift support, holds the rear engine lid open once raised, allowing safe hands-free access for inspection and maintenance without the lid falling shut.

Working Principle: A pressurized gas cylinder inside the strut extends under internal gas pressure, pushing the piston rod outward to support the weight of the engine lid as it's raised, and controlling the rate of closing when the lid is pushed back down.

Importance: Failing struts lose internal gas pressure over time, so an engine lid that used to stay open easily starts feeling heavy, sagging, or dropping unexpectedly, which is both inconvenient and a safety concern during service work.

Common Failures & Signs: Internal gas pressure loss reducing lifting force over time. Engine lid that won't stay open on its own and sags or drops. Lid that feels noticeably heavier to lift than when new. Lid that closes suddenly instead of with controlled resistance.

Key Features

OEM-standard fitment - matches factory strut length and 130N extension force for the 99151255100 application.

Precision manufacturing - reinforced steel cylinder construction for consistent lifting force.

Long service life - built to handle repeated opening and closing cycles.

Excellent fitment - direct bolt-in replacement, no modification required.

Corrosion resistance - seal design prevents leakage for consistent performance.

Reliable performance - consistent lifting force matching factory calibration.

Benefits

Importers - steady demand from a well-established sports car platform kept in long-term service.

Wholesalers - reliable repeat-order item, typically sold and installed as a pair.

Repair Shops - OEM-spec fitment reduces comeback risk on strut replacement jobs.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored safe, hands-free engine lid access.

Packaging & Shipping

Standard export packaging, sized for a gas strut component. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This gas strut is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing rear engine lid struts for the Porsche 911 (991)? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.