Dear Valued Customer
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You Are Buying
Brand: ISUMO 
ISUMO™ Brand is Registered Trademark
Designed to meet or exceed OE specifications
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Quantity: Total 4 Pieces
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Description
Electrical Connector
of
Knock (Detonation) Sensor 
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Part#
EC1040 x 4
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OEM Part:
13627598861
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Cross-Reference
KS397
A2C59506395
AS10251
KS1025
KS1026
KS1027

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Fits:
BMW520I2014-2016
BMW528I2012-2016
BMW550I2011-2018
BMW550I GT2011-2017
BMW650I2012-2019
BMW750I2012-2020
BMW750LI2012-2018
BMWALPINA B62015-2017
BMWALPINA B72011-2020
BMWALPINA B7L2011-2013
BMWM52013-2020
BMWM550I2018-2019
BMWM62012-2019
BMWM850I2019
BMWX52011-2019
BMWX62011-2019
BMWX72019
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Features & Benefits:
ISUMO connectors and wiring harnesses are designed to replace worn, damaged, 
or corroded electrical connections.
Designed to meet or exceed OE specifications
Deliver reliable performance and long life
Designed for domestic, import, and specialty applications
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Returns & Warranty Policy

30-Day Returns

Returns are accepted within 30 days of the purchase date, in line with our eBay return policy.

Warranty After 30 Days

  • ISUMO® parts: 30-day returns, plus warranty replacement up to 90 days from the purchase date (exchange for the same item).
  • Other brands: after the 30-day return period, the part is covered by its manufacturer's warranty. Warranty terms differ by brand, so please check the manufacturer's website or contact them directly.
  • For warranty replacements, the buyer is responsible for return shipping and the cost of shipping the replacement.
  • Proof of purchase date is required.
  • Please message us before sending an item back so we can confirm the shipping cost.

What the Warranty Covers

Failures caused by defects in materials or manufacturing. It does not cover normal wear and tear, cosmetic damage, or improper installation.

Any alteration, modification or tampering with the item voids the warranty and the right to return it. Altered items are not eligible for any credit.

Before You Return an Item

  • Please message us first, before sending the item back or opening a return request, with a clear description of the issue and photos showing the problem.
  • Please allow us up to a maximum of 2 business days to respond. Most of the time we reply much sooner, and every message is answered by a real person on our team, not a bot. Our business hours are Monday to Friday, 10:00 AM – 5:00 PM Pacific Time (PST).

Local Pickup

If you chose local pickup, please wait for our email or eBay message confirming that your order is ready for pickup before coming in. Pickup is available during business hours, Monday to Friday, 10:00 AM – 5:00 PM (PST).

Return Condition

Items must be returned in their original packaging and in good condition. Please include a dated photo of the item when you ship it back.

Please double-check that you are returning the same brand-new part we sent you. When replacing a part, it is easy to mix up our new part with the old one removed from your vehicle. Returned items are inspected and matched to our part, so old, used or different parts returned in place of ours are not eligible for any credit or refund.

Questions? Message us through eBay. We're happy to help.