After owning a diesel car for almost a year and hanging out with a number of other diesel owners, I managed to learn a lot more about the car as well as the available mods that you can get. Note that these mods will span across both the E90 and F30 as I will generalize it but there are downsides to some of these mods which I will state in this post.

Power Mods:
These mods basically increases the power output of your car, whether it may be providing you with more horsepower or torque but most of the time it is both.

• BMW Performance Power Kit - Available for the 320d for both the E90 and F30. Currently the most expensive of the power mods available, now being sold at the BMW Authorized dealers for around RM7,000. Warranty is intact and you get more than just an ECU mod, you also get a larger intercooler as well as a radiator fan. 


• ECU Remap - A simple remap for your car's ECU. So far I haven't found any available here in Malaysia for the 320d (branded ones) but I think there are certain custom ones available. These usually do pull out the most power you can get out of the car especially the custom tuned ones done on a dyno machine. Warranty will definitely be voided.


• Piggyback - Basically a bypass between the ECU and the engine, one of the cheaper options from RM1500 to RM3000 depending on the brand. There are a few in the market currently such as DTUK, Vector, RaceChip, etc.  Gives good results and can easily be installed and removed. Falls within a grey area in terms of warranty.


• BMW Performance Power Kit + Piggyback - Seen a number of users having this combination. Provides the most amount of power output (with dyno results). Also the most expensive option of the lot.

Braking:
With great power comes greater emphasis on stopping the heavy machine.

• BMW Performance Brake Kit for E90 - A 6-pot Big Brake Kit available at BMW Authorized dealers. Warranty is intact and it is only for the front. Price can vary from RM6500+ onwards. Big brake kits are made by Brembo.


• BMW Performance Brake Kit for F30 - A 4-pot brake for the front and 2-pot brake for the rears. Warranty is intact as well.


• After-market BBK - Plenty of after-market BBK's available, brands such as Brembo, AP Racing and Stoptech are quite common.

Handling:
When managing those bends, you just want to go through them faster. And here are some of the available mods.

• Suspension - There are a few suspension set-up available, for the E90 you have your standard suspension and for the M-Sport version you have the M-Sport suspensions which are slightly lower and firmer. For the F30, currently there are only the standard suspension setup as the M-Sport variants haven't arrived yet in Malaysia. There are some talks about talking to your BMW Authorized dealer to order in the electronically adjustable suspension which BMW offers in other countries. One of the best mods to help you reduce body roll. Some brands which have been recommended include KW V2 suspensions, Bilsteins as well as local brands such as Titan (not too sure if Titan has one for E90, need to be confirmed). 


• Anti-Roll Bars - You can opt to get after-market ARB's which are thicker and firmer compared to the stock ARB. Those I have seen is the H&R ARB. This is only suited for the E90 as I haven't seen any ARB available for the F30 yet. Do leave a comment if you have seen it and I will update this post.


• Lowering springs - This lowers your ride but the downside is that you may feel a harsher ride and your suspension rebound rates may not suit the springs and cause the suspension to wear out faster.

This now concludes the list of mods that I have found, I will continue the mods (aesthetics and cosmetic) in another post and at the same time, maintain this post with more updates.