If you wrench on compact Mitsubishis, you already know the 4A9 family. The 1.5L 4A91T is the punchy, downsized turbo that shops keep asking me about. To be honest, I didn’t expect this much interest in complete assemblies, but the replacement market is buzzing—drop-in reliability beats piecing together short-blocks and ancillaries.
This unit is a complete, ready-to-install engine assembly for select models running the 1.5L turbo architecture—think compact sedans and hatches where efficiency and mid-range torque matter. Many customers say it drops in smoother than expected, though ECU calibration and emissions gear can vary by market. Always match by VIN and ECU code, not just the name Engine Assembly for 4A91T 81 kW 1.5L for Mitsubishi.
| Parameter | Specification (≈ / real-world may vary) |
|---|---|
| Rated power | 81 kW @ ≈5500 rpm (SAE J1349/ECE R85) |
| Displacement | 1499 cc, inline-4, DOHC 16V, MIVEC VVT |
| Induction | Turbocharged, intercooled |
| Torque | ≈143–150 Nm @ 3500–4200 rpm |
| Block/head materials | Aluminum alloy with cast-iron liners / aluminum head |
| Fuel system | Multi-point EFI; 95 RON recommended |
| Emissions | Euro 4–5 depending on ECU & aftertreatment |
Manufactured in Hebei, China (289 Heping East Road, Chang’an District, Shijiazhuang), the assembly uses CNC-honed bores, balanced rotating assemblies, and torque-angle fastener control. Methods follow IATF 16949/ISO 9001 quality routines; power verification aligns with SAE J1349 or ECE R85.
Typical scenarios: fleet refresh of compact sedans, dealer-level warranty swaps, and performance-retentive rebuilds where low-end spool and daily drivability matter. In fact, several shops told me fuel economy recovered immediately after installing a new Engine Assembly for 4A91T 81 kW 1.5L for Mitsubishi, likely due to restored compression and injector spray patterns.
| Vendor | Testing | Certs | Warranty | Lead Time | Price |
|---|---|---|---|---|---|
| Oujia Engine (Hebei, CN) | Hot-run dyno + leak-down | IATF 16949/ISO 9001 (vendor docs) | 12–18 months | ≈7–15 days | Mid-range |
| Reman Brand A (EU) | Bench test, brief run-in | ISO 9001 | 12 months | 2–4 weeks | Higher |
| Used (salvage) | Unknown | — | As-is/short | Immediate | Lowest |
Options often requested: ECU variant matching, turbo spec confirmation, loom/connectors, and emissions ancillaries. One taxi fleet reported a 12% drop in fuel use after replacing high-mileage units; a dealer partner cut bay time by ≈3.5 hours thanks to pre-installed ancillaries on the Engine Assembly for 4A91T 81 kW 1.5L for Mitsubishi.
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