Skip to content

Carbon Fibre Performance Rear Diffuser for BMW M140i/M135i LCI (2015-2019)

4 reviews
Sold out
Availability: translation missing: en.general.icons.icon_check_circle icon Sorry, out of stock. Back soon!

Engineered from the outset to deliver on our promise on individuality and quality, our rear diffuser for the M140i (and M135i LCI) is what the car needed from the factory. It sets off the back end of the car and adds real definition to the diffuser area - great to showcase your exhaust system. Available in a range of colour and material options, your guaranteed to find a style suitable for your car.

The standout feature of the carbon fibre diffuser is the unique V-weave in the centre. This is commonly found on supercars and emphasises quality and precision.

What's included

  • 1 x Carbon Fibre (CFRP, 2x2 Weave with symmetrical V/Herringbone Twill) Performance Rear Diffuser


Installation takes approximately 10 minutes. On each end of the OEM diffuser, it's attached underneath by one removable plastic rivet and one 8mm hexagon bolt. Two push rivets and two bolts in total. Remove both and unclip the old diffuser - it will pull out. Remove the reflectors from the original diffuser and fit to your new AUTOID Performance Diffuser. Begin the process in reverse.

A video tutorial will be coming soon.

Alternatively, we can fit onsite. Please contact us at in order to make an appointment.

Compatible models

  • BMW M135i LCI (2015-2017, F20 F21)
  • BMW M140i (2017-2019, F20 F21)

Customer Reviews
4.5 Based on 4 Reviews
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
South Korea South Korea
I recommend this product

It fits perfectly and I'm thinking of buying it again next time.

AUTOID TRE Carbon Fibre Performance Rear Diffuser for BMW M140i/M135i LCI (2015-2019) Review
Netherlands Netherlands
I recommend this product
M140i Carbon rear diffuser

This carbon rear diffuser really makes the rear end look a lot more sporty and classy. Delivery time was good, it wasn't on stock but still received it in approx. 3 weeks after ordering. (I live in The Netherlands) The fitment was ok, though I think it could have been made a few mm wider to make it fit perfectly. There is a minimal gap on the sides, but you really have to look closely in order to notice. Overall I'm really happy the way it makes the car look now!

AUTOID TRE Carbon Fibre Performance Rear Diffuser for BMW M140i/M135i LCI (2015-2019) Review
Harry C.
M140i Diffuser

Love it. Genuine amazing quality for the money.

Zack W.
Carbon Fibre Diffuser - Unreal

At first little hesitant because of the price but glad I went through with it. Went to get it fitted by Jack and so happy with the look. Finishes off the rear of the car. My only complaint is the tow hook cap as I would have liked it without it. Recommended.