Stellar Automotive Group 4F27E/FN4A-EL/FNR5 EPC Piston fits Ford/Mazda

Stellar Automotive Group 4F27E/FN4A-EL/FNR5 EPC Piston – Compatible for Ford & Mazda 2000-Up

Fix erratic shifting, harsh or soft changes, slipping, and low line pressure issues with this precision bonded EPC piston from Stellar Automotive Group.

This is the critical Electronic Pressure Control (EPC) piston that regulates main line pressure in the 4F27E, FN4A-EL, and FNR5 transmissions. The factory EPC piston commonly cracks or loses its bond over time, causing internal leakage that leads to inconsistent pressure — resulting in delayed shifts, harsh engagements, or complete slip. This direct-replacement molded piston with permanently bonded rubber seal restores accurate pressure control, delivers smooth and firm shifts, and protects the valve body and solenoids for reliable daily performance.

Perfect fit for popular models including:

• Ford Focus, Escape, Fusion, Transit Connect
• Mazda 3, 5, 6, Tribute

Symptoms of a failing EPC piston:

• Harsh or soft/erratic shifting
• Delayed engagement or slipping
• Low line pressure codes
• Premature solenoid or valve body wear

Don’t let a $40 piston cause major transmission issues — install the Stellar Automotive Group bonded EPC piston and regain consistent, firm shifting.

Note: All parts are distributed, not designed or manufactured, by Stellar Automotive Group.

Add this essential 4F27E/FN4A-EL/FNR5 rebuild part to your cart today and shift smoothly again!