HE400VG 5459710 Turbocharger for Cummins X15 14.8L 500HP
5459710, 5459710RX, 5358001RX, 5358454, 5358001, 5458936, 5458936H
Cummins X15 Turbocharger
New HE400VG Replacement Turbochargers for X15 EPA17 and EPA21 Engines
The Cummins X15 replaced the ISX15 in 2017 and now powers a large share of new Kenworth, Peterbilt, Freightliner and International Class 8 tractors. Every X15 runs a Holset HE400VG variable geometry turbo with an electronic actuator, but the part number changes with the emissions generation and horsepower rating — an EPA17 unit will not calibrate correctly on an EPA21 engine. We stock brand new HE400VG turbos for the X15 Efficiency and Performance series across both generations: 5459710 for EPA17 450-500 HP ratings, 5459711 for Performance series 525+ HP, and 5602145 for EPA21 engines. Each unit is new-built to OEM-spec dimensions, balanced, and verified against your ESN and CPL before it ships. For the older ISX15 and other Cummins commercial engines, see our main Cummins page. Single units and fleet restock orders ship from US inventory.
- 100% Brand New
- OEM-Spec Quality
- US Stock, Fast Dispatch
- Exact Part-Number Match
- 1-Year Warranty
- Bulk & Distributor Supply
- No Core Charge
Why Fleets Source X15 Turbos From Us
An X15 tractor that is down for a turbo is a revenue unit parked. The part itself is only half the problem — the other half is getting the right generation, the right rating, and a unit the actuator will actually pair with. Our X15 program is built around those three things.
All New — No Core Deposit, No Return Freight
Every X15 turbo we ship is 100% new — new CHRA, wheels and housings. No core deposit tied up, no old unit to crate and ship back, no waiting on credit. For a fleet shop processing multiple turbo jobs a month, that is real admin time back.
EPA17 and EPA21 Matched by Part Number
The X15 changed turbo part numbers between EPA17 and EPA21, and again between Efficiency and Performance ratings. We stock all three current configurations — 5459710, 5459711 and 5602145 — and match your order against the ESN, CPL and the number on your old turbo's dataplate before it leaves the warehouse. Wrong-generation comebacks do not happen on our watch.
Actuator Pairing, Handled Honestly
The Holset electronic actuator on the X15 must be calibrated to the turbo body through Cummins INSITE. We tell you up front what each listing includes, whether your existing actuator can transfer, and what the pairing step looks like — so the job is planned correctly before the truck is in the bay.
Built for Fleet Downtime Math
X15 trucks run coast-to-coast schedules. We hold US inventory and dispatch in-stock units within 24 hours, with expedited options when a truck is loaded and waiting. The goal is simple: the turbo should never be the longest lead item on the work order.
Wholesale Pricing That Holds
Shops keep margin on the job and distributors hold a steady wholesale cost whether the order is one piece or a pallet. Pricing stays consistent order to order — see our bulk and wholesale program.
One-Year Warranty With Root-Cause Support
Every unit carries a one-year warranty against material and workmanship defects, handled by our US-based team. Before you install, we walk through the root-cause check — oil supply, intake leaks, EGR soot load — because a new turbo on an unresolved failure cause is a comeback waiting to happen. Details on our warranty page.
WHY CHOOSE US
X15 supply without the runaround
We confirm the generation and rating before shipping, hold the part on a US shelf, and answer the phone after the sale. Fleets standardize on us because the process is the same every time — single unit or full restock. Read about our company and quality process.
FAQ
Pull three things: the engine serial number (ESN) from the dataplate, the CPL code, and the part number stamped on your current turbo. The X15 uses different HE400VG configurations by emissions generation and horsepower rating, and those three identifiers pin down the exact unit. Send them to us and we confirm the match before anything ships.
They are different turbo part numbers with different calibrations. EPA17 engines (2017-2020) run the 5459710 on 450-500 HP Efficiency ratings and the 5459711 on Performance series ratings. EPA21 engines (2021+) run the 5602145. The units are not interchangeable across generations — the ECM expects the matching configuration.
No. The ISX15 runs the HE451VE family (and HE551V/HE561VE on earlier tiers), while the X15 runs the HE400VG. They mount to different platforms with different actuator calibrations. ISX15 turbos are on our main Cummins page.
Depends on the listing — some ship as turbo only, some as complete assemblies. Either way, the Holset electronic actuator must be calibrated to the turbo through Cummins INSITE after installation. Each product page states what is included; if your actuator tests good it can usually transfer to the new body.
All units are 100% brand new with all-new internal components — no rebuilt cores. There is no core charge and nothing to return. Every turbo is balanced and built to OEM-spec dimensions, with a one-year warranty.
Yes. Fleets, repair shops and parts distributors are our core customers. US inventory, consistent wholesale pricing, and the same ESN verification on every unit in a bulk order. See the wholesale page for program details.
Cummins X15 Turbocharger Guide
The X15 is the highest-volume heavy-duty engine in North America today, and its turbo is a single-unit Holset HE400VG VGT. That sounds simple compared with older multi-variant platforms, but the part number still splits three ways — and ordering the wrong one stalls the job at the calibration step. Here is what matters when sourcing an X15 turbo.
From ISX15 to X15: What Changed at the Turbo
When Cummins launched the X15 for 2017, the turbo moved from the ISX15's HE451VE family to the smaller, faster-responding HE400VG. The new unit pairs with downsped powertrains that cruise at lower RPM, so the VGT spends more of its life trimming vane position to hold boost at low engine speed. That duty cycle is efficient, but it also means soot management around the nozzle ring matters more than ever — vane sticking remains the number one wear pattern.
X15 Turbo Configurations by Generation
| Generation | Model years | Series / rating | Turbo part number |
|---|---|---|---|
| EPA17 | 2017-2020 | Efficiency, 450-500 HP | 5459710 |
| EPA17 | 2017-2020 | Performance, 525+ HP | 5459711 |
| EPA21 | 2021+ | All ratings | 5602145 |
Always confirm against the ESN and the number on the old turbo — mid-cycle running changes exist, and the dataplate wins over the model year.
How the HE400VG Works on the X15
The HE400VG uses a sliding-nozzle VGT mechanism driven by a Holset electronic actuator. The ECM commands vane position hundreds of times a minute to manage boost, EGR flow and the engine brake. That last point matters for diagnosis: on the X15, a weak engine brake is often the first symptom a driver reports when the VGT mechanism or actuator starts to fail — before any boost code sets.
Failure Signs and Common Fault Codes
Watch for low boost under load, slow boost response after gear changes, a weak or dead engine brake, high EGTs, and gray-black smoke. Typical codes include SPN 2387 (VGT actuator position error), and boost deviation faults. Trucks on short-haul or high-idle duty cycles soot the nozzle ring faster and fail earlier than line-haul units.
Replacing an X15 Turbo the Right Way
Three steps protect the new unit. First, find the cause of the old failure — inspect the charge-air system for leaks, check oil condition and feed pressure, and look at EGR soot load. Second, install with a clean oil supply: new oil, new filter, flushed feed line, and prime the turbo before first start. Third, calibrate the actuator through INSITE and verify the full vane sweep before the truck leaves the bay. Skipping any of these is how a warranty-quality part turns into a comeback.