SKU: 17603534298

STAGE 1 PERFORMANCE UPGRADE FOR BMW 4 SERIES 420D N47D20 B47D20 TURBO DIESEL 2.0L I4

Sale price$158.40 Regular price$176.00
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

STAGE 1 PERFORMANCE UPGRADE FOR BMW 4 SERIES 420D N47D20 B47D20 TURBO DIESEL 2.0L I4This Mace ETC and K&N's air filter have been put together to meet the performance upgrade requirements of BMW 4 series I4 engines. Mace ETC eliminates the delay that exists between the throttle pedal and the butterfly in the throttle body, re establishing throttle response and bottom end acceleration while improving low torque. There are different performance modes in this ETC that helps you to increase throttle response and improve overall

This Mace ETC and K&N's air filter have been put together to meet the performance upgrade requirements of BMW 4 series I4 engines.

Mace ETC eliminates the delay that exists between the throttle pedal and the butterfly in the throttle body, re-establishing throttle response and bottom-end acceleration while improving low torque. There are different performance modes in this ETC that helps you to increase throttle response and improve overall drivability.

The K&N replacement air filter is designed to boost the horsepower and acceleration while providing superior filtration. It is washable and reusable and is custom designed to fit into your existing factory air box. This filter lasts up to 80,000km before cleaning is required depending upon driving conditions. It comes with K&N million mile limited warranty and it will not void vehicle warranty.

Modes of ETC:

  • Sport Mode: 9 stages of increased accelerator response suited for spirited driving.
  • Economy Mode: Reduced accelerator response suited for economy driving around towns and on highways.
  • Normal Mode: Factory throttle response.

ETC Features:

  • OBD.II free, meaning power is sourced directly from the pedal and additional plugs are no longer required.
  • Temperature ranges from -40 to 125 °C.
  • Previously set stage numbers are retained thanks to Power off memory function.
  • Digital signal output AD/DA up to 10 Bit, efficiently responds to the original throttle signal.

Air Filter Specifications:

  • Air filter shape: Panel
  • Outside length: 8.938 in (227 mm)
  • Outside width: 8 in (203 mm)
  • Height: 1.25 in (32 mm)

Contents:

  • 1 X Mace ETC
  • 1 X K&N Air filter

Vehicle Fitment Guide

Notes:

  • Installation of the Mace ETC is quite simple and the modification is completely reversible within a couple of minutes. All kits include simple fitting and calibration instructions.
  • The air filter included in this package can be purchased separately through another listing.
  • The ETC included in this package can be purchased separately through another listing.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 17603534298

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ELozano
Waukegan, US
★★★★★ 3
Not a proper fit
Received as promised by the seller. My cons on this item: 1) the socket holes does not make a tight fit with the light bulb sockets I have. Both issues for left and right. I had to double the o-ring on my light sockets to make it tight fit. 2) The rubbers around the casing was not properly glued in. The rubber sticks out by a few centimeters. Pics attached.
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Reviewed in the United States on November 29, 2025
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Jupiter
Draper, US
★★★★★ 4
Looks great on my 2005 BMW 325i
Very pleased with the results after I assembled on my car…except the fit of bulb socket to assembly was a little loose on both of them….but I think it will be fine.
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Reviewed in the United States on November 23, 2024
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Verified Purchase
Trent adkins
Bozeman, US
★★★★★ 5
Works as it should
Right part fit good
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Reviewed in the United States on November 10, 2025
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Verified Purchase
Jerimiah Cuevas
Waukegan, US
★★★★★ 5
Perfect it
Color: Matte Black, Size: For 1999-2002 E46 Coupe Cabriolet Pre-LCI
Many aftermarket grills fit like crap. This one fit better than the OEM. (2001 325ci)
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Reviewed in the United States on January 16, 2024
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Verified Purchase
Heybraham Rios
Natrona Heights, US
★★★★★ 5
Fit my 01 325ci
Color: Matte Black, Size: For 1999-2002 E46 Coupe Cabriolet Pre-LCI, Color: Matte Black, Size: For 1999-2002 E46 Coupe Cabriolet Pre-LCI
It fit perfectly and it came in faster then stated . 10/10
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Reviewed in the United States on December 27, 2023

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