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| Feature | BuyAutoParts 40-30314AN Volvo D12 Diesel Holset HX52 Replacement Turbocharger | 5494878RX 6.7 Cummins Turbo Actuator Compatible with Dodge Ram 2500 3500 4500… |
|---|---|---|
| Year Coverage | CLASS-8 SLEEPER | — |
| Warranty | 12-month unlimited | — |
| Core Charge | None required | — |
| See the Listing | See the Listing |
Different Engine Families, Different SKU Classes
The structural asymmetry on this cross-shop is the engine family and the SKU class. These two products serve different decisions on different chassis.
The 40-30314AN fits the Volvo D12 Class-8 truck chassis:
The WOLLAHS 5494878RX fits the Cummins 6.7L Ram chassis:
40-30314AN: Complete Volvo D12 HX52
The 40-30314AN is the BuyAutoParts complete-turbo replacement on the Class-8 Volvo D12 chassis. The OE chain runs through the Volvo 3599996 / 3599996-D / 20516147 part numbers across the 1995-2009 D12 production run.
The BuyAutoParts warranty term:
WOLLAHS 5494878RX: Cummins 6.7L Actuator Only
The WOLLAHS 5494878RX is the actuator-only Cummins HE300VG / HE351VE replacement on the 2013-2018 Ram 2500 / 3500 / 4500 / 5500 chassis. The buyer is replacing the failed electronic actuator on the existing turbo without removing the turbo itself.
The WOLLAHS bundled-tool line:
WOLLAHS publishes a 10-year after-sales service positioning:
Rebuilder-Tier Context On Both Sides
Neither the 40-30314AN nor the WOLLAHS 5494878RX sits at the rebuilder-tier institutional-quality top of its respective segment. Both are aftermarket alternatives to the rebuilder-tier specialty units that anchor the high end of the Class-8 and Cummins 6.7L Ram markets.
For the Volvo D12 side, the rebuilder-tier alternatives include Industrial Injection (Class-8 specialty), ATS Diesel Performance (Class-8 + Cummins ISX), and KC Turbos premium. These specialty units carry institutional warranty depth and documented production history that the BuyAutoParts entry tier does not match. The cross-shop on the Volvo D12 side is downward from rebuilder-tier or upward from generic eBay imports.
For the Cummins 6.7L Ram side, the rebuilder-tier alternatives include Geno\'s Garage / City Diesel actuators with documented 60,000-mile owner reports, BD Diesel HE351VE upgrades, and Fleece Performance HX35 / HE300VG Cheetah complete turbos. The r/Cummins community consensus consistently routes high-mileage Ram owners (above 200k miles on the original turbo) to complete-turbo replacement rather than actuator-only repair.
If You\'re Coming From The Volvo D12 Side
If you landed on the 40-30314AN listing first, the WOLLAHS 5494878RX is not the cross-shop on your chassis. The WOLLAHS actuator is a Cummins 6.7L Ram part — different engine family, different chassis. The relevant Volvo D12 cross-shop is the rebuilder-tier Industrial Injection / ATS Diesel Performance Class-8 alternatives at the high-four-figure tier, or the broader BuyAutoParts heavy-duty diesel line including the 40-30796AN Cummins 6BT industrial HX35 (different engine, same supplier).
If You\'re Coming From The Cummins 6.7L Ram Side
If you landed on the WOLLAHS 5494878RX listing first, the 40-30314AN is not the cross-shop on your chassis. The 40-30314AN is a Volvo D12 Class-8 part — different engine family, different chassis class. The relevant Cummins 6.7L Ram cross-shop runs through the actuator-vs-cartridge-vs-complete diagnostic decision tree: the WOLLAHS 5494878RX or B.ZSSY upgrade actuator at sub-200k mileage, the Holset HE351VE Cartridge CHRA when the housings pass inspection, the ASDPI HE351VE / HE300VG or Fleece Performance Cheetah complete turbos above 200k miles or when the housings cannot be salvaged.
For underlying turbocharger engineering background, the Wikipedia turbocharger reference documents the compressor-and-turbine architecture both kits serve in their respective segments. The TSReman Turbo University service-part catalog publishes the Holset HX52 cross-reference manifest cited by the 40-30314AN listing and the Cummins HE300VG / HE351VE actuator chain cited by the WOLLAHS listing. The Rotomaster understanding turbochargers reference covers the rebuilder-tier diagnostic protocol fleet operators should run against the failed turbo before ordering either kit.
Verdict: Engine Selects The Part
No head-to-head winner because there is no head-to-head competition. Pick by which engine family has the failure on your chassis.
Pick the 40-30314AN for a Class-8 Volvo VNL / VNR / VHD with the D12 12-liter engine. Pick the WOLLAHS 5494878RX for a 2013-2018 Ram 2500 / 3500 / 4500 / 5500 with the Cummins ISB 6.7L engine and a U010C lost-communication code. Cross-stock both for a fleet shop running both engine families. Neither pick matches the rebuilder-tier institutional density of Industrial Injection / ATS Diesel (Volvo) or Geno\'s Garage / BD Diesel (Cummins) on the same engine families — for high-mileage fleet vehicles where downtime cost dwarfs parts spend, the rebuilder-tier path remains the documented institutional choice.
Heavy-Duty Diesel Cross-Cohort Questions
- Are these two parts cross-shoppable on the same vehicle?
- No. The BuyAutoParts 40-30314AN is a complete Holset HX52 turbocharger for the Volvo D12 12-liter Class-8 truck engine; the WOLLAHS 5494878RX is an actuator-only replacement for the Holset HE300VG / HE351VE variable-geometry turbocharger on the Cummins 6.7L ISB engine in 2013-2018 Ram 2500 / 3500 / 4500 / 5500 pickup and Cab Chassis trucks. Different engine families, different SKU classes (complete turbo vs actuator), different chassis platforms. The cross-shop only makes sense for a fleet operator or rebuilder shop running both engine families — for a single-vehicle owner, the engine in the truck selects the part.
- Why does the cross-shop appear in our coverage?
- Both kits serve the heavy-duty industrial diesel install base where a fleet operator may be running Class-8 over-the-road Volvo D12 trucks alongside Cummins 6.7L Ram pickups and Cab Chassis trucks in the same shop. A fleet parts manager stocking both engine families needs to know which kit covers which chassis. The 40-30314AN is the Volvo D12 line item; the 5494878RX is the Cummins 6.7L actuator-only line item. Cross-stocking both gets the fleet through the most common heavy-duty turbo failure modes on the two distinct engine platforms without routing every failure through the dealer.
- How do the warranty terms compare?
- BuyAutoParts publishes a 1-year unlimited-mileage warranty in writing on the 40-30314AN listing. WOLLAHS publishes a 10-year after-sales service positioning on the 5494878RX actuator listing — a customer-service framing rather than a written manufacturer warranty term in the strict insurance sense, but a meaningfully longer support window than the typical aftermarket actuator warranty. Both terms are substantially shorter than the rebuilder-tier institutional warranty depth on Class-8 fleet alternatives (Industrial Injection, ATS Diesel Performance) and on Cummins actuator alternatives (Geno's Garage / City Diesel).
- Which is the right call for a high-mileage Ram 2500 owner?
- Neither directly. The 40-30314AN is not a Ram 2500 / 3500 part — it fits the Volvo D12 Class-8 chassis only. The WOLLAHS 5494878RX is the actuator-only Cummins 6.7L Ram fit, but the actuator-only path only makes sense at sub-200,000-mile mileage on the original turbo. Above 200k, the r/Cummins community recommendation is to replace the entire turbo rather than just the actuator — the wear curve on the cartridge bearing, VGT vanes, and wastegate-pivot bushings has typically caught up to the actuator failure by then. For a high-mileage Ram 2500 owner above the 200k threshold, the rebuilder-tier complete-turbo alternatives (Fleece Performance Cheetah, BD Diesel HE351VE upgrade, ASDPI HE351VE / HE300VG complete) are the structurally better targets.
Use our Turbo Replacement Cost Estimator to size aftermarket spend on either engine family against the dealer-quote baseline for your chassis. For the broader heavy-duty diesel turbocharger context, route to the cross-engine turbocharger roundup.