10 Coil Spring car suspension

Specification: 15.4*410*6.25
Material: 55SiCrA oil-quenched wires

Prado 4000 rear spring-48231-6A180 has a steel wire diameter of φ15.4 mm, a height of 410 mm, an effective number of coils of 6.25, and progressive stiffness of 28 to 42 N/mm. It is applied to right rear coil springs, and designed to replace original leaf springs, achieving the triple balance of weight reduction, height increase, and heavy load capacity.

48231-6A180 is the OEM part number for the right rear coil spring (rear coil spring) of Toyota Land Cruiser 120 / Prado 150 / Fortuner series. It is applicable to multiple Middle East/Asian-spec models launched since 2002, including the Prado 4000, which is the common name for the model in the Chinese market.

Prado 4000 is the Chinese common name for the Toyota Land Cruiser Prado 4.0L gasoline version, which is positioned as a rugged luxury SUV. The 2023 Middle East version adopts a body-on-frame construction + rear solid axle with leaf springs, and the OEM part number of the rear spring is 48210-6A5V0 (a 4-5-leaf parabolic leaf spring). The spring has the advantages such as impact resistance, overload resistance, and low cost, but also has drawbacks including excessive stiffness when unloaded and large lateral jump. Modifying with reinforced leaf springs or coil springs can improve load capacity and comfortableness. The application of the 48231-6A180 coil spring well addresses these drawbacks.

The Prado 4000 rear spring-48231-6A180 has the following key characteristics:
1) single-piece product design: it weighs 4 kg per unit, replaces the original 4-5-leaf leaf spring, achieving a weight reduction of approximately 8 kg.
2) double-layer rust resistance: black epoxy spraying + PVC transparent sheath, which can effectively prevent corrosion and rust.
3) used in pairs with the left rear spring 48230-6A180.