Original Denso Engine Control Module (ECM) Volvo 8603937 8602863
Original Denso Engine Control Module (ECM) Volvo 8603937 8602863
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Genuine Denso-manufactured ECM for Volvo vehicles. This is a professionally remanufactured unit, tested and ready for Plug and Play installation.
How it works: Ship us your faulty/original module — we handle the core exchange and remanufacturing process for you.
Part Number: 8603937
Superseded Part Number: 8602863
Cross-Reference / OEM Numbers:
- P30650677 / 30650677
- P31286161 / 31286161
- P30729800 / 30729800
- 079700-9132
- 279700-9291
- 279700-9290
- 31312651
- MB279700-9560
Compatible Engines:
- B5244S4
- B5244S5
- B5244S7
Chassis Number Ranges:
- CH — up to 249999
- CH — up to 250052
- CH — up to 269999
- CH — up to 270049
- CH — up to 4952
Vehicle Fitment (5-Cylinder, Non-Turbo):
| Model | Engine | Model Years |
|---|---|---|
| Volvo C30 | 2.4L 5-Cylinder | 2007–2011 |
| Volvo C70 | 2.4L 5-Cylinder | 2006–2007 |
| Volvo S40 | 2.4L 5-Cylinder | 2004–2010 |
| Volvo V50 | 2.4L 5-Cylinder | 2005–2010 |
Please Note: Applies only to non-turbo 5-cylinder engines (B5244S4/S5/S7) — does not fit turbocharged variants.

Remanufactured
We rebuild OEM control modules with upgraded components to prevent common failures. Unlike junkyard parts that may fail within months, our modules are thoroughly tested and backed by a 6-month warranty. If it fails under warranty, reprogramming is free.
How It Works
Ship us your faulty module. We extract your original data (VIN, mileage, key codes, calibrations) and transfer it to a remanufactured unit. Your old module is recycled for parts. You receive a plug-and-play replacement ready to install.
What to Expect
✓ Turnaround: 2-3 business days
✓ Warranty: 6 months
✓ Programming: Not required—plug and drive
✓ Core Required: Yes (your original module)
About ECU Maverick — OEM Remanufactured Plug & Play Control Modules
ECU Maverick supplies OEM-quality remanufactured control modules, pre-programmed and ready to install. Based in Fort Myers, Florida, we serve independent repair shops, dealerships, and vehicle owners nationwide.
Every module we sell is thoroughly tested, remanufactured to OEM specifications, and programmed to your specific vehicle. No dealer visits, no additional coding, no hassle, ust plug in and drive.
Vehicles We Support
We stock and program modules for European luxury and performance brands, including BMW, Mercedes-Benz, Audi, Porsche, Land Rover, Bentley, Ferrari, Lamborghini, Maserati, and Aston Martin. We also carry modules for domestic vehicles, heavy equipment, and marine applications.
Why Automotive Repair Facilities and Owners Buy From Us
Plug-and-Play Ready — Every module ships pre-programmed and coded to your VIN. No dealer required.
Fast Shipping — Most orders ship within 2–3 business days. Same-day rush available.
OEM Quality — Remanufactured to original equipment standards with component-level inspection and testing.
Direct Support — Text or call us to speak with a real person. We help you find the right module the first time.
6-Month Unlimited Mileage Warranty — Drive with confidence. Our warranty covers you regardless of how many miles you put on.
Our Commitment
We exist to keep your vehicle out of the dealership and back on the road—with quality parts, transparent pricing, and expert support from start to finish. Every module we sell meets the same standards we'd expect for our own vehicles.