Performance Chip – 1994-1995 BMW 325i / 525i 2.5L (VANOS) – Non‑EWS ECM/DME

Upgrade the drivability of your 1994-1995 BMW 325i or 525i 2.5L (VANOS) with a drop‑in performance chip designed for vehicles that use the non‑EWS ECM/DME. This chip is tuned to improve throttle response, smooth out power delivery, and optimize engine behavior without major hardware changes.

Benefits

• Improved throttle response and reduced turbo lag feel (naturally aspirated models benefit from crisper response)
• Smoother mid‑range power and better drivability in everyday conditions
• Potential for more linear torque delivery for easier passing and acceleration
• Optimized fueling and timing for more consistent performance

Features

• Engine‑matched tuning for 2.5L VANOS engines (1994-1995)
• For non‑EWS ECM/DME units only
• Plug‑in or socket‑replace chip format (depending on your ECM/DME version)
• Designed to work with stock fueling and hardware – no major modifications required

Fitment / Compatibility

• 1994-1995 BMW 325i 2.5L (VANOS) – non‑EWS ECM/DME
• 1994-1995 BMW 525i 2.5L (VANOS) – non‑EWS ECM/DME

Before ordering, verify your vehicle has a non‑EWS ECM/DME. If your car uses BMW’s EWS immobilizer system, this chip will not be compatible without additional modification.

Installation

• Typical installation is straightforward: the chip replaces the factory EPROM or plugs into the ECM/DME socket.
• Some vehicles may require the ECM/DME to be removed to access the chip socket.
• Professional installation or experienced DIY is recommended if you are unfamiliar with engine control modules.
• After installation, check for proper engine start and operation. Clear any stored fault codes if necessary.

What’s included

• Performance chip programmed for 1994-1995 BMW 325i / 525i 2.5L VANOS (non‑EWS ECM/DME)
• Basic installation instructions

Important notes

• This chip is intended for use on non‑EWS ECM/DME units only. Do not install on EWS‑protected ECUs without the proper bypass or reprogramming.
• Results vary depending on vehicle condition, maintenance, and supporting hardware.
• If your vehicle has significant modifications (forced induction, major head/cam work, etc.), consult a tuner for a custom solution.

Support and warranty

• Basic installation and compatibility support available.
• Warranty details vary by seller – check the product listing or contact support for warranty and return policies.

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