Thermostat Adaptor for BMW E46 Aluminum, Silver, Diesel Engines, Fits 1, 3, 5, 6, 7 Series and X3 X5 X6

Upgrade your BMW with this CNC-machined aluminum thermostat adaptor designed for diesel engines across the E46, 1/3/5/7 series and X models. Crafted from a single aluminum billet and finished in a pristine silver, it’s built to endure under boost while helping your engine maintain optimal airflow. By reducing inlet air temperatures, this adaptor can contribute to a touch more power and improved throttle response, while also helping prevent inlet and turbo clogging for smoother performance over time.

Benefits & Tips

• Enhanced airflow efficiency: Lower inlet air temperatures can translate to more consistent power delivery and improved response during acceleration.
• Proactive protection: Helps reduce the risk of turbo and inlet fouling by keeping the airflow cleaner under demanding conditions.
• Designed for diesel BMWs: Compatible with a broad range of diesel engine codes and models listed in the fitment details; verify engine code on the Cam Belt Cover sticker or in the boot before installation.

Product specifications

• Model Number: BOP40
• Material: Aluminum (CNC machined from a single billet)
• Color: Silver
• Fitment: Adaptor for BMW E46; suitable for BMW 1 Series E87; 3 Series E90/E91/E92/E93; 5 Series E60/E60N/E61; 7 Series E65/E66; X5 E70; X3 E83/E83N; X6 E71
• Adaptor applications: BMW E46 318d, 320d, 330d, 330xd, 320cd, 318td, 320td
• Engine codes (fits the listed diesel variants): M47, M47N, M57, M47N2, M67, M47R
• Engine code examples covered: 3 Series E46 318d (2001–2005), 318td (2002–2004), 320d (1997–2005), 320cd (2003–2006), 320td (2000–2004), 330d (1998–2003), 330xd (2000–2003); 5 Series E39 520d (1999–2003), 525d (1999–2003), 530d (1997–2003); X5 E53 3.0d (2000–2003); X3 E83 2.0d (2003–2006); E38 7 Series 730d (1997–2001), 740d (1998–2001); E65 7 Series 740d (2001–2005).
• Diesel engines only; not petrol.
• DIY installation only—no installation instructions are included. Professional installation is highly recommended; we do not provide installation guidance.

Package includes:

• 1 x Aluminum Thermostat Adaptor (Model BOP40) for BMW diesel engines

Warnings/Reminders

• Diesel engines only; not petrol.
• No installation instructions included. Professional installation is highly recommended; no installation guidance provided.
• Please confirm compatibility with your engine code before purchasing.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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