2015 Cadillac CTS Parts

Before ordering anything for a 2015 Cadillac CTS, confirm the engine: our records list 4 variants (2.0L L4 Turbocharged, 3.6L V6, 3.6L V6 Turbocharged…), and many of the 3,058 parts fit only one of them. The engine code is on the emissions label under the hood if you're not sure — then pick a category below and filter to your engine.

Parts include OEM and aftermarket brands with full part numbers and application notes — position, trim and market qualifiers — so what you order matches what the factory catalog actually specifies for this vehicle.

Browse by Engine

Not sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.

Parts by Category

Belt Drive Parts

87 parts · 7 subcategories · 15 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.

Body & Lamp Assembly Parts

609 parts · 78 subcategories · 22 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.

Brake & Wheel Hub Parts

1,674 parts · 59 subcategories · 49 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.

Cooling System Parts

295 parts · 38 subcategories · 49 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.

Drivetrain Parts

141 parts · 49 subcategories · 15 brands Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.

Electrical Parts

211 parts · 38 subcategories · 31 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.

Electrical Bulb & Socket Parts

41 parts · 5 subcategories · 8 brands Verified fitment Covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.

Each category page covers all 4 engine options for the 2015 Cadillac CTS — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.

Confirm your configuration

Make Year Model Engine Part category Subcategory

Other Cadillac CTS Years

2019 2018 2017 2016 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003

Getting Fitment Right on the 2015 Cadillac CTS

The 2015 Cadillac CTS was sold with 4 engines, and that single fact drives most fitment mistakes for this vehicle. Water pumps, radiators, belts, engine mounts, exhaust components and even brake packages can differ between engine options of the same model year. Every one of the 3,058 parts listed here shows the engine(s) it fits, and the category pages include a filter that hides everything that doesn't apply to yours.

OEM-grade and aftermarket brands are listed together wherever both publish fitment for the 2015 Cadillac CTS, each with a full part number. That makes the practical workflow simple: find the subcategory, match the part number against your old part or repair quote, then choose the brand and grade that fits how the vehicle is used.

Frequently Asked Questions

How many parts fit the 2015 Cadillac CTS?

We list 3,058 parts for the 2015 Cadillac CTS, organized into 7 categories across 4 engine options. Every part includes the brand, manufacturer part number and fitment notes.

Which engines came in the 2015 Cadillac CTS?

Our records list 2.0L L4 Turbocharged, 3.6L V6, 3.6L V6 Turbocharged, 6.2L V8 Supercharged. Parts frequently differ between them — a part verified for one engine is not guaranteed to fit another — so identify your engine first (emissions label under the hood, or the VIN's 8th character), then use the engine filter on each category page.

Are OEM and aftermarket parts both available for the 2015 Cadillac CTS?

Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.

How do I verify a part number fits my 2015 Cadillac CTS?

Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model and engine appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.

Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.