--- product_id: 584433858 title: "39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play" brand: "xygdhqpt" price: "£27.54" currency: GBP in_stock: true reviews_count: 11 category: "X Ygdhqpt" url: https://www.desertcart.co.uk/products/584433858-39400-sh3-003-rz-0063-main-relay-conversion-kit-plug store_origin: GB region: United Kingdom --- # Plug-and-play ease Fits 7+ Honda/Acura models Standard relay upgrade 39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play **Brand:** xygdhqpt **Price:** £27.54 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride’s heartbeat with effortless plug & play power! ## Quick Answers - **What is this?** 39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play by xygdhqpt - **How much does it cost?** £27.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/584433858-39400-sh3-003-rz-0063-main-relay-conversion-kit-plug) ## Best For - xygdhqpt enthusiasts ## Why This Product - Trusted xygdhqpt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wide Compatibility:** Perfect fit for 88-91 Civic/CRX, 86-93 Integra, 86-90 Legend, 92-94 Vigor, 86-89 Accord, and 85-91 Prelude. - • **Seamless Plug & Play:** Direct replacement—no modifications needed, saving you time and hassle. - • **Reliable Standard Relay:** Converts your old main relay to a durable, industry-standard relay switch for enhanced performance. - • **Complete Installation Kit:** Includes relay switch, mounting bracket, and conversion harness for a smooth upgrade experience. - • **Trusted Quality & Warranty:** Backed by a 1-year warranty and highly rated by users for dependable operation. ## Overview The 39400-SH3-003 RZ-0063 Main Relay Conversion Kit is a plug-and-play solution designed to replace aging main relays in select Honda and Acura models from the mid-80s to early 90s. It converts the original relay to a standard, more reliable relay switch, improving electrical system stability without any modifications. The kit includes everything needed for installation and comes with a 1-year warranty, making it a must-have upgrade for enthusiasts seeking dependable performance and easy maintenance. ## Description Buy XYgdhqpt 39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play | Fit for 88-91 CivicCRX,86-93 Integra,86-90 Legend,92-94 Vigor,86-89 Accord,85-91 Prelude,Convert Main Relay to Standard Relay: Relay Control Module - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Perfect!!! - Shorted out the OEM relay and picked this one up. Easy swap and easier to install back in place. Works as intended and would highly recommend bought an extra to keep in the glove box, just in case. Review: Great! - Work Great!!! 100% ## Features - [COMPATIBLE WITH]:Main Relay Conversion kit Compatible With 88-91 Civic/Crx, 86-93 Integra, 86-90 Legend, 92-94 Vigor, 86-89 Accord, 85-91 Prelude - [APPLICABLE SCENARIO]:This Main relay conversion kit will convert the old main relay to a standard relay switch.(Will fit most Honda/Acura vehicles that have a obd0 plug) - [PACKAGING INCLUDES]:1x standard relay switch with mounting bracket and 1x conversion harness - [SIMPLE INSTALLATION]:The conversion kit is plug and play.Direct replacement, NOT require any modification - [NOTE]:Please confirm that the parts are the correct ones you need before purchasing. If you are not sure, please contact us for verification ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CDR5HWRC | | Best Sellers Rank | #459,849 in Automotive ( See Top 100 in Automotive ) #150 in Automotive Replacement Relay Control Module Relays | | Brand | XYgdhqpt | | Brand Name | XYgdhqpt | | Connector Type | Plug-In | | Contact Type | Normally Open | | Customer Reviews | 4.3 out of 5 stars 34 Reviews | | Item Highlight | Fit for 88-91 CivicCRX,86-93 Integra,86-90 Legend,92-94 Vigor,86-89 Accord,85-91 Prelude,Convert Main Relay to Standard Relay | | Manufacturer | XYgdhqpt | | Mounting Type | [Specific Automotive Mount] | | Number of Items | 1 | | Number of Packs | 1 | | Operation Mode | Automatic | | Part Number | 39400-SH3-003 RZ-0063 | | Unit Count | 1 Count | | Warranty Description | 1 Year | ## Product Details - **Brand:** XYgdhqpt - **Connector Type:** Plug-In - **Contact Type:** Normally Open - **Mounting Type:** [Specific Automotive Mount] - **Operation Mode:** Automatic ## Images ![39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play - Image 1](https://m.media-amazon.com/images/I/51CXy-6EJJL.jpg) ![39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play - Image 2](https://m.media-amazon.com/images/I/71Nhvqq7qJL.jpg) ![39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play - Image 3](https://m.media-amazon.com/images/I/71l8lbgAZbL.jpg) ![39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play - Image 4](https://m.media-amazon.com/images/I/71xgl6mvudL.jpg) ![39400-SH3-003 RZ-0063 Main Relay Conversion Kit,Plug and Play - Image 5](https://m.media-amazon.com/images/I/718iEeZVOxL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect!!! *by R***Y on August 16, 2026* Shorted out the OEM relay and picked this one up. Easy swap and easier to install back in place. Works as intended and would highly recommend bought an extra to keep in the glove box, just in case. ### ⭐⭐⭐⭐⭐ Great! *by K***Z on December 16, 2025* Work Great!!! 100% ### ⭐⭐⭐⭐⭐ This fixed my problem *by P***C on August 31, 2024* 92 integra would randomly not start. I wouldn't drive it anywhere being afraid I would be stranded. This took 5 minutes to replace original and now it starts up every time. ## Frequently Bought Together - 39400-SH3-003 RZ-0063 Main Relay Conversion kit Compatible with 88-91 Civic/CRX, 86-93 Integra, 86-90 Legend, 92-94 Vigor, 86-89 Accord, 85-91 Prelude,XYgdhqpt - FRAM G6534 In-Line Fuel Filter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/584433858-39400-sh3-003-rz-0063-main-relay-conversion-kit-plug](https://www.desertcart.co.uk/products/584433858-39400-sh3-003-rz-0063-main-relay-conversion-kit-plug) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-10-08*