CSF 8032 Two-Pass Oil Cooler & Heat Exchanger for BMW M3 E46 3.2 S54 (2000-2006) | Performance Uprated Bar-and-Plate 8-Row | Direct-Fit Plug & Play Track/Race Oil Cooling Upgrade | OEM Replacement Bolt-On | Drift/Time Attack | CSF Radiators

CSF 8032 Two‑Pass Oil Heat Exchanger for BMW M3 E46 2000–2006

Keep your S54 running cool on fast road and circuit use with the CSF 8032 two‑pass oil cooler. This motorsport‑grade, plug‑and‑play replacement swaps out the restrictive factory single‑pass unit for a high efficiency design that stabilises oil temperatures, improves consistency over long sessions, and adds durability where it matters. If you are searching for an uprated E46 M3 oil cooler, high performance oil heat exchanger, S54 oil cooling upgrade, or track day oil temperature solution, this is the proven choice that delivers.

We run this cooler on our own builds and customer cars. Feedback has been outstanding, with predictable oil temps, strong reliability, and straightforward fitment. Ideal for fast road, track days, drift, sprint, time attack, and endurance use.

Why enthusiasts choose this cooler

• Two‑pass flow path for significantly improved heat rejection versus the stock single‑pass unit
• Larger effective surface area with high density multi‑louvred fins for excellent thermal efficiency
• Heavy duty bar‑and‑plate core with internal turbulation to cope with hard use
• Fully TIG welded extruded end tanks for strength, impact resistance, and long service life
• Bolt‑on replacement using the original hoses and mounting points, no cutting required
• Accurate fit behind the standard bumper and compatible with splitters and undertrays

Technical highlights

• Unique top and bottom two‑pass layout maximises exposure time and cooling area
• Eight‑row core with high density fin design for rapid heat transfer
• Accepts factory oil line connections for a true plug‑and‑play install
• Works with OEM radiator brackets or CSF’s all‑aluminium triple‑pass radiator, part number CSF 7058
• Supersedes the original single‑pass cooler and plastic shroud with a stronger, more efficient package

Vehicle compatibility

BMW M3 E46 3.2 S54 2000–2006 Coupe and Convertible.

What this upgrade does for your S54

Better control of oil temperatures during hard driving, reduced heat soak, improved consistency over long stints, and added protection for bearings and seals. A smart foundation for any E46 M3 cooling package, especially when combined with a performance radiator and proper ducting.

Real‑world use

Used by MJ Modifications on in‑house projects and customer builds. Track tested, road proven, and a favourite for owners who want dependable oil temperature management without complex fabrication.

Fitting and installation

Direct bolt‑on using factory fixings and lines. For professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Compatibility check

We can verify fitment before dispatch. Add your UK registration or the last 7 characters of your VIN at checkout.

Part number

CSF 8032

Manufacturer

CSF Radiators

Warranty

CSF Lifetime Warranty

Search phrases customers use

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Order with confidence for consistent oil temps, strong reliability, and a straightforward install that supports spirited driving and track work.