The 2004 Cadillac CTS has 88 ignition parts with verified fitment on this page — 8 part types and 34 brands, covering all 3 engine options (3.2L V6, 3.6L V6 and 5.7L V8). Each part includes a manufacturer part number and application notes.
On the 2004 Cadillac CTS, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. 59 parts of the 88 listed are Ignition Coil (27 parts), Spark Plug (17 parts) and Camshaft Position Sensor (15 parts). The other 5 part types cover the remaining 29 parts.
The 2004 Cadillac CTS was sold with 3 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
34 brands supply ignition parts for the 2004 Cadillac CTS, led by STANDARD MOTOR PRODUCTS (8 parts), NGK (8 parts) and WALKER PRODUCTS (7 parts), plus 31 more brands. Quality grades include Standard Replacement, Economy and Iridium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2004 Cadillac CTS. 19 parts have it, including BOSCH 0232103047 (Camshaft Position Sensor) and BOSCH 0261210247 (Crankshaft Position Sensor). Each part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 3.6L V6 | 917747 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FAMOUS BRAND Fits: 3.6L V6 | CSA1498 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN Fits: 3.6L V6 | 2CAM0182 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| PRENCO Fits: 3.6L V6 | 4E1091 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| SKP Fits: 3.6L V6 | SKPC501 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: 3.6L V6 | CAM149 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO Fits: 3.6L V6 | V57720009 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Full Service Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: 3.6L V6 | 23591180 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Service Kit | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Popular Fits: 3.6L V6 | 0232103047 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Engine Camshaft Position Sensor | View on Amazon |
| GM GENUINE Popular Fits: 3.6L V6 | 2131565 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Popular Fits: 3.6L V6 | PC570 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DELPHI Fits: 3.6L V6 | SS11952 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| NTK Fits: 3.6L V6 | EC0317 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Possible relearn procedure required. Consult your factory service information resource for additional information. | View on Amazon |
| WALKER PRODUCTS Fits: 3.6L V6 | 2351180 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| WELLS Fits: 3.6L V6 | 5S7404 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
15 Camshaft Position Sensor parts for the 2004 Cadillac CTS come from 14 brands — WALKER PRODUCTS, DORMAN, FAMOUS BRAND and 11 other brands. The "Popular" part is BOSCH 0232103047.
The Economy section lists 7 options from DORMAN, FAMOUS BRAND, HOLSTEIN and 4 other brands — the catalog's value-priced group. DORMAN 917747 is listed in this group.
The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 23591180 is listed in this group.
In the Standard Replacement grade, BOSCH, GM GENUINE, STANDARD MOTOR PRODUCTS and 4 other brands supply 7 parts: built to original-equipment specification. A representative part number is BOSCH 0232103047.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 3.6L V6 | 907803 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FAMOUS BRAND Fits: 3.6L V6 | CSC1323 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN Fits: 3.6L V6 | 2CRK0332 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| PRENCO Fits: 3.6L V6 | 4D1263 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ULTRA-POWER Fits: 3.6L V6 | 5S6619 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: 3.6L V6 | CAM144 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Full Service Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: 3.6L V6 | 23591194 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Service Kit | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Popular Fits: 3.6L V6 | 0261210247 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Engine Crankshaft Position Sensor | View on Amazon |
| DELPHI Popular Fits: 3.6L V6 | SS12000 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Popular Fits: 3.6L V6 | PC501 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| NTK Fits: 3.6L V6 | EH0388 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Possible relearn procedure required. Consult your factory service information resource for additional information. | View on Amazon |
| WALKER PRODUCTS Fits: 3.6L V6 | 2351194 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| WELLS Fits: 3.6L V6 | 5S6619 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
13 Crankshaft Position Sensor parts for the 2004 Cadillac CTS come from 12 brands — WALKER PRODUCTS, DORMAN, FAMOUS BRAND and 9 other brands. The "Popular" part is BOSCH 0261210247.
The Economy section: 6 options from DORMAN, FAMOUS BRAND, HOLSTEIN and 3 other brands. DORMAN 907803 is listed in this group.
The Full Service Kit section: 1 option from WALKER PRODUCTS. WALKER PRODUCTS 23591194 is listed in this group.
Standard Replacement: 6 parts, from BOSCH, DELPHI, STANDARD MOTOR PRODUCTS and 3 other brands. A representative part number is BOSCH 0261210247.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Popular Fits: 3.6L V6 | SKIC099 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| B&B Fits: 3.6L V6 | BB2375 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FAMOUS BRAND Fits: 3.6L V6 | EBC1365 | 🇺🇸 US 🇨🇦 CA | RightBlack connector | View on Amazon |
| FAMOUS BRAND Fits: 3.6L V6 | EBN1428 | 🇺🇸 US 🇨🇦 CA | LeftGray connector | View on Amazon |
| FVP Fits: 3.6L V6 | UF375F | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| HOLSTEIN Fits: 3.6L V6 | 2IGC0276 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| PRENCO Fits: 3.6L V6 | 368161 | 🇺🇸 US 🇨🇦 CA | Includes 36-2115 Boot Kit | View on Amazon |
| SPECTRA PREMIUM Fits: 3.6L V6 | C747 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ignition Coil Mounts to Cylinder Head | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.6L V6 | UF375T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| ÜRO PARTS Fits: 3.6L V6 | 12629037 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO Fits: 3.6L V6 | V40700074 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WAI GLOBAL Fits: 3.6L V6 | CUF375 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Fits: 3.6L V6 | IGC0144 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Coil Type: Individual | View on Amazon |
| DELPHI Fits: 3.6L V6 | GN10309 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 3.6L V6 | UF375 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blue Streak | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.6L V6 | UF375K6 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blue Streak | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Popular Fits: 3.6L V6 | 0221604112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DENSO Popular Fits: 3.6L V6 | 6737302 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direct Ignition Coil or Stick Coil | View on Amazon |
| KARLYN / BREMI / STI Popular Fits: 3.6L V6 | 5118 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Bremi-STI Direct Ignition Coil Unit | View on Amazon |
| WALKER PRODUCTS Popular Fits: 3.6L V6 | 9212075 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Single Coil | View on Amazon |
| WALKER PRODUCTS Popular Fits: 3.6L V6 | 92840836 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Coil Set | View on Amazon |
| BECK/ARNLEY Fits: 3.6L V6 | 1788489 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GM GENUINE Fits: 3.6L V6 | 19418102 | 🇺🇸 US 🇨🇦 CA | Mating Connector Use 88988582 | View on Amazon |
| NGK Fits: 3.6L V6 | 49418 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Hardware | View on Amazon |
| NGK Fits: 3.6L V6 | 49015 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Hardware | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: 3.6L V6 | COP30 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Color: Black/Silver | View on Amazon |
| WELLS Fits: 3.6L V6 | 5C1551 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Requires External Resistor: YES | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
27 Ignition Coil parts for the 2004 Cadillac CTS come from 22 brands — STANDARD MOTOR PRODUCTS, FAMOUS BRAND, WALKER PRODUCTS and 19 other brands. The "Popular" part is SKP SKIC099. They are grouped as Economy, Premium and Standard Replacement, with Economy the largest group at 12 parts from FAMOUS BRAND, SKP, B&B and 8 other brands.
Ignition Lock Cylinder
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND Fits: 3.6L V6 | CSC1492 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 3.6L V6 | 15783576 | 🇺🇸 US 🇨🇦 CA | Trans. Code 5L40-E5 speed Automatic trans. | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.6L V6 | US529L | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Keys not Included | View on Amazon |
| WELLS Fits: 3.6L V6 | 4H1013 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Keys not Included | View on Amazon |
This table covers the lock cylinders in the ignition switch.
4 Ignition Lock Cylinder parts for the 2004 Cadillac CTS come from 4 brands — FAMOUS BRAND, GM GENUINE, STANDARD MOTOR PRODUCTS and 1 other brand.
The Economy section: 1 option from FAMOUS BRAND. FAMOUS BRAND CSC1492 is listed in this group.
Standard Replacement: 3 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS and WELLS. A representative part number is GM GENUINE 15783576.
Listed part numbers: FAMOUS BRAND CSC1492, GM GENUINE 15783576 and STANDARD MOTOR PRODUCTS US529L, plus the other parts above.
Spark Plug
Summary: Notes include pre-set gaps of 0.030", 0.040", 0.044", 0.045", 0.047", 0.050" and 0.054". Replacement brands in this table include NGK, ACDELCO and BOSCH.
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 3.6L V6 | 41834 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| ACDELCO Fits: 3.6L V6 | 41814 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| NGK Fits: 3.6L V6 | 3587 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser PlatinumPre-Set Gap: 0.040" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 3.6L V6 | 6509 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium IXPre-Set Gap: 0.044" | View on Amazon |
| AUTOLITE Fits: 3.6L V6 | XP5263 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium XP Spark Plug Dual Display PackPre-Set Gap: 0.040" | View on Amazon |
| BOSCH Fits: 3.6L V6 | 9617 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Fine Wire Double IridiumPre-Set Gap: 0.044" | View on Amazon |
| CHAMPION Fits: 3.6L V6 | 9901 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IridiumPre-Set Gap: 0.047" | View on Amazon |
| DENSO Fits: 3.6L V6 | 5339 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium PowerPre-Set Gap: 0.044" | View on Amazon |
| DENSO Fits: 3.6L V6 | 4719 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium TTPre-Set Gap: 0.040" | View on Amazon |
| NGK Fits: 3.6L V6 | 91794 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser IridiumPre-Set Gap: 0.030" | View on Amazon |
| SKP Fits: 3.6L V6 | SP1021 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Tapered Ground Electrode with Platinum Chip | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 3.6L V6 | 17 | 🇺🇸 US 🇨🇦 CA | ProfessionalRapidfire | View on Amazon |
| CHAMPION Popular Fits: 3.6L V6 | 3032 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum PowerPre-Set Gap: 0.05" | View on Amazon |
| ACDELCO Fits: 3.6L V6 | 41988 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentPlatinum | View on Amazon |
| BOSCH Fits: 3.6L V6 | HR7MPP302X | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Fine Wire PlatinumPre-Set Gap: 0.044" | View on Amazon |
| NGK Fits: 3.6L V6 | 90198 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | G-PowerPre-Set Gap: 0.040" | View on Amazon |
Ruthenium (maximum durability & ignitability)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 3.6L V6 | 91276 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ruthenium HX High IgnitabilityPre-Set Gap: 0.044" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
17 Spark Plug parts are listed for the 2004 Cadillac CTS, from NGK, ACDELCO, BOSCH and 4 other brands. NGK 6509 carries the "Popular" badge.
In the Double Platinum (lasts up to 3x longer than Copper / Nickel) grade, ACDELCO and NGK supply 3 parts: grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 41834.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 8 options from NGK, DENSO, AUTOLITE and 3 other brands — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 6509 is listed in this group.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, ACDELCO, CHAMPION, BOSCH and 1 other brand supply 5 parts: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 17.
In the Ruthenium (maximum durability & ignitability) grade, NGK supplies 1 part: grouped under the catalog's "Ruthenium (maximum durability & ignitability)" designation — the notes column spells out what sets them apart. A representative part number is NGK 91276.
Spark Plug / Ignition Coil Boot
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 3.6L V6 | 20931 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Federal Wire | View on Amazon |
| WALKER PRODUCTS Fits: 3.6L V6 | 900P2087 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 3.6L V6 | SPP159E | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ACDELCO Fits: 3.6L V6 | 16116 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| NGK Fits: 3.6L V6 | 58983 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the silicone and rubber boots that insulate the coil-to-plug spark path. Typical signs include a misfire in the rain, carbon tracking on the boot, or a snap when you pop the coil off. Replace boots as a set on a high-mileage engine; one cracked boot will take the coil with it.
5 Spark Plug / Ignition Coil Boot parts for the 2004 Cadillac CTS come from 4 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, ACDELCO and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS SPP159E.
The Economy section: 2 options from STANDARD MOTOR PRODUCTS and WALKER PRODUCTS. STANDARD MOTOR PRODUCTS 20931 is listed in this group.
Standard Replacement: 3 parts, from STANDARD MOTOR PRODUCTS, ACDELCO and NGK. A representative part number is STANDARD MOTOR PRODUCTS SPP159E.
This group includes STANDARD MOTOR PRODUCTS SPP159E, STANDARD MOTOR PRODUCTS 20931 and WALKER PRODUCTS 900P2087 and the remaining parts above.
Spark Plug Tube
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MELLING Fits: 3.6L V6 | MSPT4 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Spark Plug tubes.
One part is listed for the 2004 Cadillac CTS — MELLING MSPT4.
Spark Plug Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular Fits: 3.6L V6 | ES72393 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GM GENUINE Popular Fits: 3.6L V6 | 12607600 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| APEX Fits: 3.6L V6 | AES316 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ELRING Fits: 3.6L V6 | 994680 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Material: Nitrile Butadiene Rubber (NBR) | View on Amazon |
| MAHLE / CLEVITE Fits: 3.6L V6 | GS33763 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Contains 6 Spark Plug Tube SealsSpark Plug Tube Seal Kit | View on Amazon |
| VICTOR REINZ Fits: 3.6L V6 | 181003501 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Valve Cover | View on Amazon |
This table covers the seals at the Spark Plug Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
6 Spark Plug Tube Seal parts for the 2004 Cadillac CTS come from 6 brands — FEL-PRO, GM GENUINE, APEX and 3 other brands. The "Popular" part is FEL-PRO ES72393.
Part numbers include FEL-PRO ES72393, GM GENUINE 12607600 and APEX AES316, among others listed above.
Buying Ignition Parts for a 2004 Cadillac CTS
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Every ignition part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 2004 Cadillac CTS?
Our catalog currently lists 88 ignition parts for the 2004 Cadillac CTS across 8 subcategories and 34 brands, covering all 3 engine options (3.2L V6, 3.6L V6 and 5.7L V8). Each part is matched to the engine(s) it fits.
Do ignition parts differ between 2004 Cadillac CTS engines?
Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of ignition problems on a 2004 Cadillac CTS?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2004 Cadillac CTS?
Notes on this page include pre-set gaps of 0.030", 0.040", 0.044", 0.045", 0.047", 0.050" and 0.054". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2004 Cadillac CTS was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2004 Cadillac CTS?
First match the engine — each row shows which engine(s) the part fits. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2004 Cadillac CTS
Ignition Parts for Other Cadillac CTS Years
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