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K1A00-3705061A FN100-3705061 Ignition Coil for YUCHAI Natural Gas Engine
The K1A00-3705061A and FN100-3705061 are interchangeable ignition coils for Yuchai natural gas engines. They fit YC6L, YC4G, YC6G, YC6MK, YC6A, and YC6J platforms powering SHACMAN, HOWO, Dongfeng trucks and Yutong, King Long, Golden Dragon buses. Also cross-references M2C00-3705061, G2K00-3705061A, and Torch DQR2270A-M. RJT PARTS tests every unit before shipping, offers a 12-month warranty, and delivers worldwide in 3–7 days by express. Not sure if it fits? Send your old part number photo to info@rjtparts.com — we confirm within 24 hours.
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K1A00-3705061A FN100-3705061 Ignition Coil for YUCHAI Natural Gas Engine | RJT PARTS
Product Overview
The K1A00-3705061A and FN100-3705061 are two interchangeable ignition coil part numbers for Yuchai natural gas engines. Both deliver high-voltage spark to the cylinders and convert 12V or 24V battery current into the thousands of volts needed for clean combustion. They fit a wide range of Yuchai CNG and LNG engines powering buses, trucks, and coaches across global markets.
RJT PARTS supplies this coil as a direct-fit aftermarket replacement. It matches the original Yuchai mounting footprint and electrical connector, so installation takes minutes on the cylinder head. Every unit passes bench testing for insulation resistance and spark output before we ship it.
Both numbers share the 3705061 suffix, which identifies the same physical coil. The prefix (K1A00 or FN100) only indicates which engine platform originally used that number. Therefore, you can order either number and receive an identical, fully interchangeable part.
Cross-Reference Part Numbers
All numbers below share the 3705061 suffix and interchange physically.
| Part Number | Prefix Origin | Common Fitment |
|---|---|---|
| K1A00-3705061A | YC6L / YC4G platform | SHACMAN, HOWO, Dongfeng trucks; Yutong buses |
| FN100-3705061 | YC6G / bus platform | City buses, coaches (Yutong, King Long, Golden Dragon) |
| K1A00-3705061 | Earlier revision | Same as K1A00-3705061A (superseded) |
| M2C00-3705061 | Universal / multi-platform | Buses, trucks, generators |
| M2D00-3705061 | Dongfeng Tianjin / JAC | Medium trucks |
| G2K00-3705061A | Yuchai / Weichai gas | Multi-brand application |
| MY300-3705061A | Dongfeng heavy truck | Tianlong, heavy trucks |
| J3C00-3705061A | Yuchai gas | Bus and truck |
| DQR2270A-M | Torch | Aftermarket equivalent |
Important: Any part number ending in 3705061 (with or without an A suffix) is the same physical coil. K1A00-3705061A is the latest revision and supersedes all earlier non-A versions.
Compatible Yuchai Engine Models
| Engine Series | Displacement | Power Range | Common Applications | Fuel | Coils per Engine |
|---|---|---|---|---|---|
| YC6L | 8.4L | 220–330 HP | Heavy trucks, coaches, city buses | CNG / LNG | 6 |
| YC4G | 5.2L | 140–220 HP | Medium buses, light trucks | CNG / LNG | 4 |
| YC6G | 7.8L | 180–260 HP | City buses, school buses | CNG / LNG | 6 |
| YC6MK | 10L | 280–380 HP | Heavy coaches, intercity buses, trucks | CNG / LNG | 6 |
| YC6A | 7.2L | 200–280 HP | Medium trucks, buses | CNG / LNG | 6 |
| YC6J | 6.5L | 160–245 HP | City buses, school buses | CNG / LNG | 6 |
Common vehicle brands:
- Trucks: SHACMAN, HOWO, Dongfeng, Foton, United Trucks
- Buses: Yutong, King Long, Golden Dragon, Higer, Zhongtong, Ankai, Sunlong
Diesel engines do not use this part. This coil fits spark-ignited natural gas (CNG/LNG) engines only.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Name | Ignition Coil |
| OEM Numbers | K1A00-3705061A, FN100-3705061 |
| Full Cross Reference | M2C00-3705061, M2D00-3705061, G2K00-3705061A, MY300-3705061A, J3C00-3705061A, DQR2270A-M |
| Engine Make | Yuchai (YUCHAI) |
| Compatible Models | YC6L, YC4G, YC6G, YC6MK, YC6A, YC6J (Natural Gas) |
| Input Voltage | 12V / 24V DC |
| Output Type | High-voltage spark |
| Mounting | Bolt-on, cylinder head mounted, one per cylinder |
| Connector | OEM-matching electrical plug |
| Packaging | 6 pieces per box |
| Quantity per Engine | 4 (4-cyl) or 6 (6-cyl) |
| Condition | New, aftermarket |
| Testing | 100% bench tested |
| Warranty | 6-12 months |
| Lead Time | 1–3 days (stock), or produce depends on quantity |
Key Features
- Dual OE number coverage. One SKU replaces both K1A00-3705061A and FN100-3705061 — plus all other 3705061-suffix coils.
- Broad engine fitment. Covers Yuchai gas engines from 5.2L (YC4G) to 10L (YC6MK).
- Wide vehicle application. Fits SHACMAN, HOWO, Dongfeng trucks and Yutong, King Long, Golden Dragon buses.
- Dual voltage support. Works with both 12V and 24V electrical systems.
- Cost-effective. OEM-level performance at a lower aftermarket price point.
Failure Symptoms — When to Replace
- Engine misfire under load or at cruising speed
- Check engine light with misfire codes (P0300–P0306)
- Increased gas consumption (higher CNG/LNG usage)
- Rough idle or hesitation on acceleration
- Loss of power on gradients or with full loads
- Visible cracks, carbon tracking, or burn marks on the coil body
- Hard starting in cold weather
Fleet tip: Buses and trucks running constant routes put heavy stress on ignition components. Replace all coils during a major tune-up to avoid repeated roadside failures. RJT PARTS offers discounted 4-coil and 6-coil engine sets.
Installation Notes
- Disconnect the battery before starting work.
- Remove the engine cover and any intake piping blocking the coil pack.
- Unplug the electrical connector from the faulty coil.
- Remove the hold-down bolt and pull the coil straight off the spark plug.
- Compare the old coil with the new unit to confirm matching dimensions and connector orientation.
- Apply dielectric grease to the inside of the new coil boot before installation.
- Seat the new coil and torque the mounting bolt to Yuchai factory specification.
- Reconnect the harness and battery. Clear fault codes and start the engine to verify smooth operation.
Follow Yuchai service manual lockout/tagout procedures for natural gas fuel systems before servicing.
Why RJT PARTS
RJT PARTS supplies engine replacement parts to truck fleets, bus operators, and distributors worldwide. We know that downtime costs revenue, so we keep this multi-number ignition coil and all its cross-references on the shelf.
- Verified fitment. We cross-check every order against Yuchai part catalogs and engine serial numbers.
- One SKU, many numbers. Order this part and it covers K1A00-3705061A, FN100-3705061, and all 3705061-suffix variants.
- Fast dispatch. In-stock orders leave our warehouse within 48 hours of payment.
- Flexible quantities. Order one coil for a repair or a full carton for fleet stock.
- Bulk discounts. Tiered pricing at 10, 50, and 100+ pieces.
- Worldwide shipping. DHL, FedEx, air freight, and sea freight to over 100 countries.
- Technical support. Send your engine nameplate or old part number — we confirm the match within 24 hours.
Custom Product Attributes
| Attribute | Value |
|---|---|
| Supplier | RJT PARTS |
| Part Name | Ignition Coil |
| OEM No. | K1A00-3705061A, FN100-3705061 |
| Cross Ref. | M2C00-3705061, M2D00-3705061, G2K00-3705061A, MY300-3705061A, J3C00-3705061A, DQR2270A-M |
| Engine Brand | Yuchai |
| Engine Model | YC6L, YC4G, YC6G, YC6MK, YC6A, YC6J |
| Vehicle Brands | SHACMAN, HOWO, Dongfeng, Foton, Yutong, King Long, Golden Dragon, Higer, Zhongtong |
| Fuel Type | CNG / LNG (Natural Gas) |
| Voltage | 12V / 24V |
| Qty/Engine | 4 or 6 pcs |
| Packaging | 6 pcs/box |
| Condition | New Aftermarket |
| Warranty | 6-12 Months |
| MOQ | 1 pc |
| Shipping | DHL / FedEx / Air / Sea |
| Payment | T/T, PayPal, Western Union, Trade Assurance |
FAQ
Q: Are K1A00-3705061A and FN100-3705061 the same part?
A: Yes. Both share the 3705061 suffix and are physically identical. The different prefixes (K1A00 vs FN100) only indicate the original engine platform. Either number works for all Yuchai 3705061-family gas engines.
Q: What does the “A” suffix mean?
A: The “A” indicates the latest revised version. K1A00-3705061A supersedes K1A00-3705061 and installs identically.
Q: Will this coil fit my YC6MK engine?
A: Yes. The 3705061-family coil fits YC6MK, YC6L, YC6G, YC4G, YC6A, and YC6J natural gas engines.
Q: What is DQR2270A-M?
A: DQR2270A-M is the Torch (火炬) brand aftermarket equivalent of the 3705061-family coil. It matches Yuchai OEM specifications and interchanges fully.
Q: How many coils does my engine need?
A: 6-cylinder Yuchai gas engines (YC6L, YC6G, YC6MK, YC6A, YC6J) use 6 coils. 4-cylinder engines (YC4G) use 4 coils.
Q: Does this coil fit diesel engines?
A: No. This coil fits natural gas (CNG/LNG) engines only. Diesel engines use compression ignition and do not require ignition coils.
Q: What is the warranty?
A: 12 months from the date of delivery. We replace any coil that fails due to manufacturing defects.
Request a Quote
Need the K1A00-3705061A / FN100-3705061 ignition coil for a Yuchai gas engine? RJT PARTS has it in stock and ready to ship. One SKU covers all 3705061-suffix variants — simplify your inventory with us.
Send your part number, quantity, and destination country to info@rjtparts.com, or message us on WhatsApp for an instant quote. We reply within 24 hours.
📧 info@rjtparts.com
💬 WhatsApp: +86 178 8245b4252
