Mahle 42299CP Engine Piston Ring Set

Engine piston ring set overview

Mahle 42299CP is a premium engine piston ring set built for standard-bore applications with a 3.5433-inch bore diameter. It is engineered around low-friction ring technology to help control oil consumption and support longer service life in the engine.

Key features

• Standard oversize configuration for the listed applications.
• Top ring material uses stainless steel for durability in the ring pack.
• Second ring uses carbon steel for a balanced sealing design.
• Oil ring assembly uses GNS material and GNS face coating.
• Shallow groove design with 0.0390-inch top and second ring thickness.
• Mahle 42299CP is a premium-grade piston ring set.

Fitment details

• Fits 2015-2017 Toyota Avalon, N/A.
• Fits 2015-2017 Toyota Camry, N/A.
• Fits 2015-2017 Toyota RAV4, N/A.
• Fits 2014-2016 Lexus ES300h, N/A.
• Fits 2015-2016 Lexus NX300h, N/A.
• Fits 2015-2016 Scion tC, N/A.

What this part helps address

• Oil consumption caused by worn or tired piston rings.
• Loss of cylinder sealing that can affect compression.
• Excess friction from aging ring components.
• Reduced ring performance in high-mileage engines.

Installation notes and tips

Confirm bore diameter, ring thickness, and shallow-groove compatibility before installation. Clean the cylinder walls thoroughly and inspect the pistons and ring lands for wear or damage. This part cross-references Hastings Piston Rings (e.g., 2C4132) for the same application.

Quality assurance

Mahle develops piston rings to OE requirements and focuses on reducing friction, lowering ring mass, and extending service life. The 42299CP reflects that engineering approach for standard replacement use.