modz 148 Report post Posted March 9, 2018 Before I commit to the project, is there anything I should be aware of from a wiring perspective for an E46 318i N42B20 to M54B30 conversion? I'm aware that I'll need ECU and DME so will line all that up from the M54 donor. TIA 1 Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted March 9, 2018 what year is the car and engine , ecu etc , auto or manual swap ?? Quote Share this post Link to post Share on other sites
modz 148 Report post Posted March 9, 2018 Original car 2001 N54B20 318i auto touring M54b30 will be ex 330i 2001 also, but will run ZF 5 speed. Upgraded mechanicals - brakes, subframe, PS, driveshaft, diff etc I've just converted an E46 330ci to ZF 5 speed so am more familiar with them now I have watched your video's on youtube converting the Ti also Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted March 9, 2018 yup pretty much the same thing ,, only thing different in the ti is the diff carrier and the rear exhaust , Quote Share this post Link to post Share on other sites
modz 148 Report post Posted March 9, 2018 Thanks Brent Quote Share this post Link to post Share on other sites
HELLBM 1552 Report post Posted March 9, 2018 3 hours ago, modz said: Before I commit to the project, is there anything I should be aware of from a wiring perspective for an E46 318i N42B20 to M54B30 conversion? I'm aware that I'll need ECU and DME so will line all that up from the M54 donor. TIA We have done plenty of these conversions and decided to make things easier with a ews delete/EU 2 tune/SAP delete and Manual software version. Have plenty of these DME`s available. All wiring and plugs required are available as well. Quote Share this post Link to post Share on other sites
allan 295 Report post Posted March 9, 2018 (edited) It 's the little things that you want even think of that will trip you up. Their are a number of differences on a conversion of this nature Vehicles New Zealand new or Japanese imports Wiring for auto to manaul and you mention Zf different again, vent piping eml different diameters, A/c left side for the N42,46 right side for the M54 pipe work change over, wiring lengthen and re-route,care of the connector on the a/c pump they brake real easy. Ignition key an barrel all door locks etc check to see if remote access is inferred or radio on both vehicles Heater control valves, system auto or manual type Exhaust, pipe diameter mounting points. mufflers These are a few things that come to mind. It makes for a great project hope you keep a record and let us all share.Plenty of info and people Ray and Brent who have practical experience an can help out best of luck Edited March 9, 2018 by allan 2 Quote Share this post Link to post Share on other sites