TdV6 ECU swap

**Laurie** · 25th November 2018, 04:28 PM

My daughter is about to purchase a MY15 TdV6 D4 with plenty of extras. The only thing she would like to do is have the SD upgrade/remap ? My wife and her drove a few and both could tell the SD was more powerful

Could we purchase a ECU from a SD write-off etc and replace the original ECU, I know I will have to change the engine security code settings; but is there anything else ? Otherwise we are looking at a remap.

Laurie

**RANDLOVER** · 26th November 2018, 01:30 PM

I'm not sure, it will pro'ly have to be coded to the vehicles VIN. I know that when I had to have the D3's EAS ECU changed that it had to be coded and a new programme downloaded by the dealer. A GAP IID tool or similar might be able to do this. Hopefully someone more au fait will be along shortly to enlighten us.

Ean Austral · 26th November 2018, 04:50 PM

I am no expert but isn't the SD model the twin turbo ? Not sure you could adapt it to a TDV6 single turbo without some major rewrite .

Cheers Ean

**101RRS** · 26th November 2018, 06:24 PM

Originally Posted by Ean Austral

I am no expert but isn't the SD model the twin turbo ? Not sure you could adapt it to a TDV6 single turbo without some major rewrite .

Cheers Ean

Hmmm - no - in the later D4s the TDV6 is the sequential turbo 3.0 in detuned form (155kw?) and the SDV6 is the sequential turbo 3.0 in the high state of tune (185kw?)

And I thought the difference between the two 3.0 engines was more than ECU tune - I think there are some material differences as well.

Garry

**cjc_td5** · 26th November 2018, 06:58 PM

Originally Posted by garrycol

Hmmm - no - in the later D4s the TDV6 is the sequential turbo 3.0 in detuned form (155kw?) and the SDV6 is the sequential turbo 3.0 in the high state of tune (185kw?)

And I thought the difference between the two 3.0 engines was more than ECU tune - I think there are some material differences as well.

Garry

Not to my knowledge Garry. Pistons etc are all the same for TDV6 vs SDV6. The only difference is ECU tune.

**Laurie** · 1st December 2018, 08:44 PM

Thank God for Topix ! A check revealed that some listed options were not fitted; spoke to the dealer who agreed they were not fitted, he was very genuine and fixed the ad on Carsales. There is a lot of confusion by many posters on Carsales what options or option packs have been fitted. Have had a numbers of cars now wrongly optioned in ads. Anyway today she has purchased a low mileage 2011 HSE; so wont be needing the swap.

Laurie

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