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SKU: CB-E46-S5XOILCOOL | UPC: 810156698903
Chase Bays 99-06 BMW 3-Series E46 (w/M5X/S5X) Oil Cooler Kit
Chase Bays Oil Cooler Kit provides critical engine oil cooling for 1999-2006 BMW 3-Series E46 chassis equipped with M5X (M54) or S5X (S54) engine swaps. This bolt-on system reduces oil temperatures by 30-50°F during track sessions or aggressive street driving to maintain viscosity, protect bearings, and sustain power. Premium components ensure direct fit and dependable operation in any high-performance E46 build, including M3 conversions.
Key Features
- 10-Row Stacked Plate Oil Cooler: 11" wide x 7.75" tall x 1.75" thick core with 5/8-18 O-ring ports delivers massive cooling capacity to drop oil temps 30-50°F under heavy load for sustained engine performance.
- Thermostatic Sandwich Plate: 180°F bypass plate with -10AN ports maintains optimal oil temperature on cold starts before directing flow to the cooler for consistent protection and flow.
- 25ft -10AN Stainless Braided PTFE Hose: Abrasion-resistant lines offer flexible routing from engine to cooler with unrestricted full flow and zero leaks for long-term reliability.
- Billet 6061 Aluminum Fittings: Three -10AN 90° swivels and one straight swivel in black anodized finish resist corrosion and allow precise installation adjustments without tools.
- Custom E46 Mounting Bracket: Laser-cut 1/8" steel powdercoated bracket mounts cooler to OEM radiator support holes ahead of radiator for maximum airflow and compatibility with AC condenser or intercoolers.
Product Notes
- Kit includes all fittings, hardware, and zip ties for complete installation on M5X or S5X swapped E46 chassis.
- Requires 1-2 quarts additional oil capacity. check levels after installation and initial runs.
- Special order item with 3-7 business day lead time direct from Chase Bays.
Installation Notes
- Professional installation recommended.
- Remove stock oil cooler lines at filter housing. sandwich plate installs between housing and filter with provided O-rings.
- Mounts to OEM radiator support holes. clears AC condenser, intercooler setups, and common E46 modifications.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1999-2006 | BMW | 3 Series | E46 (w/M5X/S5X) |
| 1999-2003 | BMW | 323i | E46 Chassis w/M5X/S5X |
| 1999-2003 | BMW | 325i | E46 Chassis w/M5X/S5X |
| 1999-2003 | BMW | 328i | E46 Chassis w/M5X/S5X |
| 2001-2006 | BMW | 330i | E46 Chassis w/M5X/S5X |
| 2001-2006 | BMW | M3 | E46 Chassis w/S5X |
Why Choose Chase Bays?
- USA-made components proven in grassroots racing and daily street E46 builds.
- CNC-machined billet aluminum and stainless steel construction for enduring strength.
- Engineered for bolt-on fit on BMW M54 and S54 swaps without cutting or fabrication.
Frequently Asked Questions
-
Q: Will this fit a stock E46 M3 with S54 engine?
A: Yes, bolts directly to any 1999-2006 E46 chassis with S54 or M54 engine including stock M3 or swaps. perfect for high-horsepower setups needing reliable cooling. -
Q: What materials are used in the kit?
A: 6061-T6 billet aluminum fittings and sandwich plate, 304 stainless braided hose over PTFE core, and powdercoated steel mounting bracket. -
Q: What is the warranty and install time?
A: Lifetime warranty on fittings against leaks. Expect 4-6 hours for DIY with basic tools or 2 hours in a professional shop.
Shipping & Handling
- Method: UPS Ground
- Availability: Special order - ships 3-7 business days
- Packaging: Foam-protected box 24in L x 14in W x 8in H
- Weight: 9.8 lbs
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