Bosch Motronic Ecu upgrade for Land rover Discovery 2 4.0/4.6 and Range rover P38 Thor engine

Bosch Motronic Ecu upgrade for Land rover Discovery 2 and Range rover P38 Thor engine

Tornado
SKU:
TS-Motronic
Availability:
Usually ships within 7-10 business days
€854.64
(1 review)
Current Stock:
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Description

This is an upgrade for your Bosch powered D2 or P38. We have built and modified this tune to work with your stock or performance oriented engine.

Details on setup:

  • TWS Performance Tune Installed
  • Improved mid-range (3000-4500rpm) with 10-15lb ft tq
  • Faster throttle response
  • Fuel economy improved 10-15%
  • Rev limit raised to 6k
  • Unlocked and can be used in any corresponding vehicle.

You must supply a core ECU for this upgrade. We suggest you put insurance on the shipment. Please ship your core ECU with your invoice to

  • TWS Motors
  • Attn: Core Return
  • 144 W Britannia St, Building 25, Gate 4
  • Taunton MA 02780

NOTE: If you are still using SLS, please let us know in the order comments.

Recommended Parts:

 

Fits:

  • 99-02 Bosch Range Rover P38
  • 99-04 Discovery 2

Reviews

  • 5
    Bosch Motronic ECU upgrade for LR D2 abd RR P38

    Posted by Mike Axt on 21st Feb 2026

    Amazing performance. Emissions CARB certified in Colorado. Absolutely necessary when upgrading to oversized high comp pistons, stage 2 valve train, machining masters restoring the block and heads, blue printing, balancing, the 4.6 18% larger maf and intake components, ceramic exhaust manifolds, magnaflow exhaust, walker CARB approved cats, proper 8mm blue wires, etc., etc. The stock ECU for the 4.0 engine will continuously throw a lean condition for both banks and never pass emissions with the '03-'04 D2 intake components I would love to attach the CARB emission certificate reflecting this brilliantly reengineered ECU from TWS Motors flying through the CARB inspection. The power output and drivability is hard not to overate. It is a fact that a correctly built high perf 4.6 in a D2 in no way, shape or, form - needs an LS swap. My D2 is now as enjoyable to drive as our 6.2L powered Escalade. And the D2 does not have a speed governor. A true freeway flyer. Effortlessly hauls. (of course I keep a set of road wheels and a set of snow/ice/off road wheels.) The powerful engine I assembled is very similar to the builds available through TWS. I can't emphasize enough that with a 4.6 built to hi-perf specs - a D2 does not need an LS swap. The exhaust note is superb. But, you can't get there w/o this reengineered masterpiece. I also want to express my thanks to the Team at TWS for quickly addressing every single concern or question I had regarding the purchase of this pricey upgrade. Money very well spent.