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This product was last offered at the strikethrough price on
02-04-2026
This product was last offered at the strikethrough price on
02-04-2026
If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.
To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.
Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.
FEATURES
Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part number 12427549396.
This product was last offered at the strikethrough price on
02-04-2026
This product was last offered at the strikethrough price on
02-04-2026
If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.
To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.
Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.
FEATURES
Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part numbers 12427549393, 12427795404, and 12427790559.
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
Universal High-Flow Air Filter
Give your engine the airflow it deserves with this reusable, high-performance air filter—perfect as a direct replacement for an ECS intake system or as the finishing touch for your custom intake project.
Dimensions: 4.5" Base OD • 6" Filter Height • 3.5" Top OD
Upgrade from your restrictive factory filter to an ECS Tuning High-Flow Dry Air Filter and let your engine breathe freely. Improved intake flow enhances power throughout the rev range while helping maintain efficient fuel economy.
Oiled vs. Dry Filters — Which Is Right for You?
Oiled Filters
Offer slightly higher airflow for maximum performance
Require more frequent cleaning
Must be re-oiled after each cleaning
Long-term reusable design saves money over disposable paper filters
Dry Filters
Provide excellent airflow with minimal maintenance
Easily cleaned with warm, soapy water—no oiling required
Still flow significantly better than OE paper filters
Fully reusable and cost-effective
Both versions deliver superior performance over stock filters while offering the long-term benefit of reusability. Choose the option that best fits your maintenance style and performance goals.
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
Restore Reliability to Your E9x Headlights with ECS Tuning’s Premium Replacement Harness
Headlight electrical issues are a common headache for many E9x owners. Over time, the factory wiring inside Pre-LCI BMW E92 and E93 3 Series headlights—as well as all E9x M3 models equipped with factory Xenon adaptive lighting—tends to become brittle and crack. This well-known problem can lead to flickering lights, adaptive headlight malfunction warnings, or even internal shorts that cause costly damage. With genuine Xenon headlights becoming increasingly scarce, maintaining them has never been more important.
ECS Tuning offers a long-lasting solution with its Headlight Wiring Harness Repair Kit, engineered specifically to eliminate this failure point. Each harness is built from modern, heat-resistant materials and fitted with pre-terminated, OEM-style connectors for a clean, straightforward installation. The result is improved reliability and restored confidence in your lighting system.
Don’t wait until your lights fail or an adaptive headlight error appears. Replace your deteriorating factory harness with ECS Tuning’s upgraded repair kit and keep your lighting system performing as it should.
Key Features
Designed for Xenon Adaptive Headlights
OE-style fitment with enhanced insulation to resist cracking and heat damage
Complete set includes both left and right harnesses, plus integrated jump wire for full functionality
Detailed installation instructions provided for easy DIY installation
Fitment & compatibility:
All E90, E92, E93 M3 E92 Pre-LCI 328i, 328xi, 335i E92 Pre-LCI 328i, 335i Kit Contents:
One headlight repair harness (Fits left or right) 3x - heat shrink sleeves 9x - 22-24 gauge butt connectors Product Development:
This headlight repair harness was developed, engineered, and quality-tested by ECS Tuning’s in-house Research & Development team. Every detail reflects ECS’s commitment to precision and durability, utilizing advanced tools and technology, including FARO laser scanning, SolidWorks 3D CAD modeling, in-house 3D printing for rapid prototyping, and long-term performance testing.
Installation & Support:
ECS Tuning provides a comprehensive installation guide that covers the entire process, from opening your OEM headlights to installing the new harness.
- CLICK HERE FOR INSTALLATION INSTRUCTIONS -
This product was last offered at the strikethrough price on
05-03-2026
This product was last offered at the strikethrough price on
05-03-2026
The N5X family of engines marked the start of a new era for BMW. The all-new aluminum block powerplants featured a host of technical upgrades, aiding in power output, reliability, and performance. Among these technological advances is an external electronic water pump, which removed load from the engine's accessory drive and allowed for advanced pulse-width-modulated (PWM) control.
From factory, the N52's electronic water pump is limited to a measly 200W output—strong enough for daily driving, but lacking in performance applications. Recognizing this shortcoming, ECS engineers set out to create a high-flow water pump upgrade that doesn't break the bank. Their high-quality adapter wiring harness and bracket allow you to install a 400W N54 water pump without any modification, an effortless, yet effective upgrade that doubles the output of the factory water pump!
By increasing coolant flow capacity, the 400W pump improves heat extraction from the cylinder head and engine block during high-load operation. This added thermal headroom is particularly beneficial for modified engines, sustained aggressive driving, track use, or operation in elevated ambient temperatures where the factory pump can operate near its limits. Improved circulation helps maintain more stable coolant temperatures and reduces the risk of localized hot spots.
Features & Benefits:
Upgrades to the more powerful 400W N54 water pump for increased coolant flow and improved engine cooling efficiency Sealed adaptor harness ensures secure connections and optimal operation under demanding conditions The N54 pump's higher power output offers longer-lasting, more effective cooling compared to the stock N52 pump Design:
40A fused power wire safely handles the increased power demands of the N54 pump, providing consistent and stable performance Sealed and robust construction, designed to withstand heat and moisture, ensuring reliability in even the most challenging environments Plug-and-play compatibility is designed for easy integration with the N52 engine and N54 water pump, minimizing installation time and complexity Kit Contents:
ECS N54 Water Pump Adapter Kit Conversion wiring harness Aluminum bracket Installation hardware Bavarian Autosport Water Pump (11517632426)
The N5X family of engines marked the start of a new era for BMW. The all-new aluminum block powerplants featured a host of technical upgrades, aiding in power output, reliability, and performance. Among these technological advances is an external electronic water pump, which removed load from the engine's accessory drive and allowed for advanced pulse-width-modulated (PWM) control.
From factory, the N52's electronic water pump is limited to a measly 200W output—strong enough for daily driving, but lacking in performance applications. Recognizing this shortcoming, ECS engineers set out to create a high-flow water pump upgrade that doesn't break the bank. Their high-quality adapter wiring harness and bracket allow you to install a 400W N54 water pump without any modification, an effortless, yet effective upgrade that doubles the output of the factory water pump!
By increasing coolant flow capacity, the 400W pump improves heat extraction from the cylinder head and engine block during high-load operation. This added thermal headroom is particularly beneficial for modified engines, sustained aggressive driving, track use, or operation in elevated ambient temperatures where the factory pump can operate near its limits. Improved circulation helps maintain more stable coolant temperatures and reduces the risk of localized hot spots.
Features & Benefits:
Upgrades to the more powerful 400W N54 water pump for increased coolant flow and improved engine cooling efficiency Sealed adaptor harness ensures secure connections and optimal operation under demanding conditions The N54 pump's higher power output offers longer-lasting, more effective cooling compared to the stock N52 pump Design:
40A fused power wire safely handles the increased power demands of the N54 pump, providing consistent and stable performance Sealed and robust construction, designed to withstand heat and moisture, ensuring reliability in even the most challenging environments Plug-and-play compatibility is designed for easy integration with the N52 engine and N54 water pump, minimizing installation time and complexity Kit Contents:
ECS N54 Water Pump Adapter Kit Conversion wiring harness Aluminum bracket Installation hardware Pierburg Full Aluminum Water Pump (11515A05704) Installation:
- Click HERE for Installation Instructions -
This product was last offered at the strikethrough price on
03-19-2026
This product was last offered at the strikethrough price on
03-19-2026
This brand new BMW Coilover line from ECS Tuning was designed with daily drivers in mind! Their focus was to improve on the performance and look of the suspension, without forgoing any comfort. Like many of the top tier coilovers, these coilovers feel as smooth and comfortable as a stock setup, while giving you an aggressive look and vastly improved handling, all at a fraction of the price!
The ECS Tuning Performance Coilover System provides a sport-tuned, height, damping, and body adjustable suspension with substantial performance benefits using high-quality materials and coatings to replace your worn suspension, all while giving your vehicle that perfect ride height!
Spring Rates: Front is 8kg/mm, Rear is 12kg/mm
PERFORMANCE FEATURES
32 levels of rebound damping adjustment Adjustable damping, monotube shocks/struts paired with optimized progressive rate coil springs gives your vehicle road-sticking grip with reduced body roll for exceptional confidence in your vehicle's handling. With your vehicle's new, lower ride height the center of gravity is now moved lower, further improving handling performance Adjustable front bodies allow you to set the ride height while maintaining correct spring pre-load Adjustable front and rear bodies allow the shock to operate in the correct valving range, regardless of ride height PRODUCT DESIGN
Strut and shock bodies finished with a durable gloss black powder coat for good looks and great longevity Threaded portions are clear zinc-coated for optimum corrosion protection against rain and salt Coil springs are powder-coated Reflex Silver Metallic finish for durability Red anodized, billet aluminum lower spring seats with locking collars allow for quick, on-the-car, adjustability with the included spanner wrenches Integrated bump stops KIT CONTENTS
ECS Performance Adjustable Coilover System - E9X (RWD) Front Suspension Installation Hardware: Strut Mount Gasket - 31306772226 (2) Spindle Pinch Bolt - 33326760346 (2) Spindle Pinch Nut - 33326760668 (2) Strut Rod to Cowl External Torx-Head Bolt - 07146954965 (1) Strut Rod to Strut Tower External Torx-Head Bolt - 07146963730 (2) Sway Bar End Link Locking Nut - 33326768884 (2) Front Axle Nut - 33411133785 (2) Rear Suspension Installation Hardware: Lower Control Arm Nut - 33306760349 (4) Lower Shock Mount Bolt - 33526764406 (4) Lower Shock Mount - 33526768544 (2) Upper Shock Mount (Upper) - 33506771737 (2) Upper Shock Mount (Lower) - 33506771738 (2) Upper Shock Mount Sealing Grommet - 33506767010 (2) CLICK HERE FOR INSTALLATION INSTRUCTIONS
This product was last offered at the strikethrough price on
04-02-2026
This product was last offered at the strikethrough price on
04-02-2026
This brand new BMW Coilover line from ECS Tuning was designed with daily drivers in mind! Their focus was to improve on the performance and look of the suspension, without forgoing any comfort. Like many of the top tier coilovers, these coilovers feel as smooth and comfortable as a stock setup, while giving you an aggressive look and vastly improved handling, all at a fraction of the price!
The ECS Tuning Performance Coilover System provides a sport-tuned, height, damping, and body adjustable suspension with substantial performance benefits using high-quality materials and coatings to replace your worn suspension, all while giving your vehicle that perfect ride height!
Spring Rates: Front is 8kg/mm, Rear is 12kg/mm
PERFORMANCE FEATURES
32 levels of rebound damping adjustment Adjustable damping, monotube shocks/struts paired with optimized progressive rate coil springs gives your vehicle road-sticking grip with reduced body roll for exceptional confidence in your vehicle's handling. With your vehicle's new, lower ride height the center of gravity is now moved lower, further improving handling performance Adjustable front bodies allow you to set the ride height while maintaining correct spring pre-load Adjustable front and rear bodies allow the shock to operate in the correct valving range, regardless of ride height PRODUCT DESIGN
Strut and shock bodies finished with a durable gloss black powder coat for good looks and great longevity Threaded portions are clear zinc-coated for optimum corrosion protection against rain and salt Coil springs are powder-coated Reflex Silver Metallic finish for durability Red anodized, billet aluminum lower spring seats with locking collars allow for quick, on-the-car, adjustability with the included spanner wrenches Integrated bump stops KIT CONTENTS
ECS Performance Adjustable Coilover System - E9X (RWD) Front Suspension Installation Hardware: Strut Mount Gasket - 31306772226 (2) Spindle Pinch Bolt - 33326760346 (2) Spindle Pinch Nut - 33326760668 (2) Strut Rod to Cowl External Torx-Head Bolt - 07146954965 (1) Strut Rod to Strut Tower External Torx-Head Bolt - 07146963730 (2) Rear Suspension Installation Hardware: Lower Control Arm Nut - 33306760349 (4) Lower Shock Mount Bolt - 33526764406 (4) Lower Shock Mount - 33526768544 (2) Upper Shock Mount (Upper) - 33506771737 (2) Upper Shock Mount (Lower) - 33506771738 (2) Upper Shock Mount Sealing Grommet - 33506767010 (2)
