One of today’s jobs was a Land Rover Defender TD5 in Redruth that had been suffering from excessive smoke caused by a faulty aftermarket tuning box. The issue meant it was repeatedly failing its MOT emissions test, leaving the owner frustrated.
We were happy to head back to our friends at RWG Engineering in Redruth to get this sorted properly. The solution was straightforward:
- Removed the aftermarket tuning box that was causing the issues
- Applied a Kernowsport performance remap
- Completed a full EGR delete
The results spoke for themselves. Despite having over 250,000 miles on the clock and being in daily use as a working vehicle, the Defender is now running smoothly and cleanly — like new again.
We love working on Land Rover Defenders. They’re known for their toughness, simplicity, and reliability, even after decades of use. This TD5’s old-school OBD system allowed us to read and write the ECU in under 3 minutes, making the process quick and efficient.
With its smoke problem fixed and performance improved, this Defender is ready to keep working hard for many more years to come.
Why Choose Kernowsport for Land Rover Remapping?
- Expertise with Land Rover Defender TD5 and TDCi engines
- Solutions for emissions problems, EGR faults, and tuning box issues
- Covering Redruth, Camborne, and across Cornwall
- Professional, reliable service for working and high-mileage vehicles
If your Land Rover Defender needs a remap, EGR delete, or performance tuning, Kernowsport is here to help.














