High Performance Front-Mount Heat Exchanger BMW G20/G42/Z4 - B48/B58

A direct bolt-on front-mount heat exchanger for the BMW B48 and B58 water-to-air intercooler system, replacing the thin single-row factory unit with a much thicker, multi-row core. It keeps charge-air temperatures stable under sustained boost, preventing the power drop and limp mode tuned cars hit when the OEM exchanger heat-soaks.

Replaces OE Part No. 17118741830

Specifications

• Core size: 524mm (L) × 478mm (H) × 69mm (W)
• All-aluminium, high-efficiency multi-row core with multi-louvered fins
• CNC-machined OEM-style mounting pins and brackets
• Plug-and-play quick-connect coolant fittings
• Includes detachable front rock guard · direct bolt-on, no modification

What it does

• Lowers intake temps, with a thicker multi-row core that rejects far more heat than the factory single-row unit.
• Prevents heat soak, holding temperatures stable across repeated acceleration runs without creep or power fade.
• Helps stop limp mode, since improved thermal stability prevents the ECU power reduction tuned B48/B58 cars suffer.
• Built for tuned cars, recommended for Stage 1, Stage 2, hybrid and upgraded-turbo setups.

Build quality

Full aluminium construction built to handle prolonged high-temperature operation, with CNC-machined mounting points for precise fitment and a detachable rock guard for frontal protection. Direct bolt-on using factory mounting points and coolant connections.

Compatible Models

3 Series: 330i/M340i (G20/G21, 2019-2025)
2 Series: M240i (G42, 2021-2025)
4 Series: 430i/M440i (G22/G23/G26, 2020-2025)
Z4: sDrive30i/M40i (G29, 2019-2025)