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K1A00-3705061 YUCHAI Natural Gas Igniton Coil
The K1A00-3705061 ignition coil (superseded by K1A00-3705061A) is a direct replacement for Yuchai YC6L and YC4G natural gas engines. It fits SHACMAN, HOWO, Dongfeng trucks and Yutong, King Long, Zhongtong buses. It interchanges with all 3705061-suffix Yuchai coils 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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K1A00-3705061 Ignition Coil for YUCHAI YC6L YC4G Natural Gas Engine | RJT PARTS
Product Overview
The K1A00-3705061 ignition coil delivers high-voltage spark to the cylinders in Yuchai YC6L and YC4G natural gas engines. It converts 12V or 24V battery current into the thousands of volts needed to fire the spark plugs cleanly under all load conditions. This part powers heavy-duty trucks and buses across China, Russia, Southeast Asia, and Africa.
RJT PARTS supplies the K1A00-3705061 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 coil passes bench testing for insulation resistance and spark output before we ship it.
This coil belongs to the same 3705061 suffix family as the M2C00-3705061. Therefore, the two numbers interchange physically. However, K1A00-3705061 is the original equipment number specified for YC6L and YC4G platforms, including SHACMAN and HOWO natural gas trucks.
Cross-Reference Part Numbers
| Part Number | Brand / Platform | Notes |
|---|---|---|
| K1A00-3705061 | Yuchai | Primary number (earlier revision) |
| K1A00-3705061A | Yuchai | Latest supersession, replaces non-A version |
| K1A00-3705061A-AR2 | Yuchai | Variant for Dongfeng CNG vehicles |
| M2C00-3705061 | Yuchai | Same suffix family, interchangeable |
| M2D00-3705061 | Yuchai | Same suffix family, interchangeable |
| FN100-3705061A | Yuchai | Same suffix family, interchangeable |
| G2K00-3705061A | Yuchai / Weichai | Same suffix family, interchangeable |
| DQR2270A-M | Torch | Aftermarket equivalent from Torch Spark Plug |
Important: All numbers with the 3705061 suffix interchange physically. K1A00-3705061A is the latest revision and supersedes the non-A K1A00-3705061. When ordering, any 3705061-suffix coil works for YC6L and YC4G engines.
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 |
Common vehicle brands using these engines:
- Trucks: SHACMAN, HOWO, Dongfeng, Foton
- Buses: Yutong, King Long, Golden Dragon, Zhongtong
- Joint venture trucks: United Trucks
Diesel YC6L and YC4G engines do not use this part. This coil fits spark-ignited natural gas (CNG/LNG) versions only.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Name | Ignition Coil |
| OEM Number | K1A00-3705061 (superseded by K1A00-3705061A) |
| Cross References | M2C00-3705061, M2D00-3705061, FN100-3705061A, G2K00-3705061A, DQR2270A-M |
| Engine Make | Yuchai (YUCHAI) |
| Compatible Models | YC6L, YC4G (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 (YC4G) or 6 (YC6L) |
| Condition | New, aftermarket |
| Testing | 100% bench tested |
| Warranty | 12 months |
| Lead Time | 1–3 days (stock) |
Key Features
- YC6L / YC4G specific. Original equipment number for these two Yuchai gas platforms.
- Broad vehicle coverage. Powers SHACMAN, HOWO, Dongfeng trucks and Yutong, King Long buses.
- 3705061 family interchange. Works with any 3705061-suffix Yuchai coil.
- Dual voltage support. Handles 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: YC6L-powered trucks running long-haul routes put heavy stress on ignition components. Replace all six coils during a major tune-up to avoid repeated breakdowns. 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 K1A00-3705061 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 the K1A00-3705061 coil and all its cross-references on the shelf.
- Verified fitment. We cross-check every order against Yuchai part catalogs and engine serial numbers.
- 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, including Russia and CIS states.
- 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. | K1A00-3705061 |
| Superseded By | K1A00-3705061A |
| Cross Ref. | M2C00-3705061, M2D00-3705061, FN100-3705061A, G2K00-3705061A, DQR2270A-M |
| Engine Brand | Yuchai |
| Engine Model | YC6L, YC4G |
| Vehicle Brands | SHACMAN, HOWO, Dongfeng, Yutong, King Long, 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: Is K1A00-3705061 the same as K1A00-3705061A?
A: Yes. The “A” suffix indicates the latest revised version. K1A00-3705061A supersedes K1A00-3705061 and installs identically. Both numbers refer to the same coil.
Q: Can I use M2C00-3705061 instead of K1A00-3705061?
A: Yes. Both share the 3705061 suffix and interchange physically. The different prefixes (K1A00 vs M2C00) identify the original engine platform, but the coil itself is identical.
Q: What is DQR2270A-M?
A: DQR2270A-M is the Torch (火炬) brand aftermarket equivalent of K1A00-3705061. Torch is a major Chinese ignition component manufacturer, and their version matches the Yuchai OEM specifications.
Q: How many coils does a YC6L engine need?
A: The YC6L is a 6-cylinder engine, so it uses 6 ignition coils. The YC4G is a 4-cylinder engine and uses 4 coils.
Q: Will this coil fit a SHACMAN CNG truck?
A: Yes. Many SHACMAN natural gas trucks use Yuchai YC6L engines with K1A00-3705061 ignition coils. HOWO and Dongfeng CNG trucks also use this coil.
Q: Does this coil fit diesel engines?
A: No. The K1A00-3705061 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 K1A00-3705061 ignition coil for a Yuchai YC6L or YC4G gas engine? RJT PARTS has it in stock and ready to ship. We also carry all 3705061-suffix cross-references and Torch DQR2270A-M equivalents.
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 8245 4252
