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Dayco 71178 Radiator Coolant Hose
| Brand | Dayco 71178 |
|---|---|
| Position | Upper |
| Color | Black |
| End 1 Inside Diameter | 1 1/4 |
| End 2 Inside Diameter | 1 1/4 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 16 |
| Product line | Curved Radiator Hose |
| Fits | BMW, INFINITI, Mazda, Toyota, Buick, Eagle, Mitsubishi, Oldsmobile, Dodge, Plymouth, Ford, Isuzu, Nissan, Pontiac, Saab, Chevrolet, Triumph, Lancia, Mercury, Fiat, and Alfa Romeo · 152 vehicles |
Curved radiator hose. Shaped for a cleaner, more direct coolant routing.
EPDM construction. Resists heat and coolant exposure for dependable service.
Single I.D. hose. Provides a straightforward replacement for coolant transfer.
Cross-references ACDelco 20002S, ACDelco 20266S and ACDelco 22213M for the same application. See all 117.
Dayco 71178 Curved Radiator Hose
Dayco 71178 is a curved radiator coolant hose built for upper and lower cooling-system routing on a wide range of import and domestic vehicles. Made from EPDM rubber with a black finish, it uses a single I.D. hose design with 1 1/4-inch inside diameter ends for a direct replacement-style fit.
This Dayco Curved Radiator Hose line is focused on OE-style cooling system service, with SAE J20R4 Class D-1 and SAE J1684 Type EC compliance listed for this part. If you are replacing a worn upper radiator hose on a BMW Z3, Toyota Supra, Mazda 929, or similar application, part number 71178 provides a straightforward match for the specified cooling layout.
Key Features
- EPDM construction for cooling-system use
- Black curved radiator hose profile
- 1 1/4-inch inside diameter at both ends
- Single I.D. hose design
- SAE J20R4 Class D-1 and SAE J1684 Type EC listed
- No heat shield and no protective sleeve
- Fits upper, lower, and pipe-to-engine/pipe-to-radiator applications listed below
Detailed Description
Dayco 71178 is a radiator coolant hose engineered for vehicles that use a curved hose path in the cooling circuit. The EPDM rubber construction is suited to coolant exposure and underhood temperature demands, while the 1 1/4-inch end diameters support the specified OE-style routing. This hose is listed across a broad range of applications, including upper radiator hose service on the 1996-1998 BMW Z3, upper radiator hose service on the 1990-1998 INFINITI Q45, and upper radiator hose service on the 1986-1992 Toyota Supra.
Additional listed applications include the 1989-1995 Mazda 929, 1991-1995 Toyota MR2 lower pipe-to-engine routing, and 1985-1987 Ford Ranger lower hose service. This part cross-references Gates 20137 and ACDelco 20002S for the same application.
Vehicle Fitment
- Fits 1996-1998 BMW Z3, Upper
- Fits 1990-1998 INFINITI Q45, Upper - Radiator To Cap
- Fits 1989-1998 Mazda MPV, Upper
- Fits 1988-1995 Mazda 929, Upper
- Fits 1992-1995 Mazda 929, Lower
- Fits 1991-1995 Toyota MR2, Lower - Pipe To Engine
- Fits 1991-1993 Buick Riviera, Upper
- Fits 1989-1992 Mitsubishi Galant, Upper
- Fits 1987 Mitsubishi Galant, Upper
- Fits 1991-1992 Mitsubishi Mirage, Upper
- Fits 1989 Mitsubishi Mirage, Upper
- Fits 1991-1992 Mitsubishi Mirage, Lower
- Fits 1987-1989 Mitsubishi Mirage, Lower
- Fits 1991-1992 Oldsmobile Toronado, Upper
- Fits 1989-1992 Toyota Cressida, Upper
- Fits 1986-1992 Toyota Supra, Upper
- Fits 1991 Buick Reatta, Upper
- Fits 1984-1991 Dodge Colt, Upper
- Fits 1986-1991 Dodge Colt, Lower
- Fits 1986-1988 Buick Skylark, Upper
- Fits 1983-1988 Mitsubishi Cordia, Upper
- Fits 1983-1988 Mitsubishi Tredia, Upper
- Fits 1988 Oldsmobile Cutlass Calais, Upper
- Fits 1985-1987 Ford Ranger, Lower
- Fits 1985-1987 Isuzu Impulse, Upper
- Fits 1986-1987 Nissan 200SX, Upper - Pipe To Engine
- Fits 1986-1987 Nissan 200SX, Upper - Pipe To Radiator
- Fits 1985-1987 Oldsmobile Calais, Upper
- Fits 1985-1987 Pontiac Grand Am, Upper
- Fits 1985-1986 Saab 900, Upper - Pipe To Engine
- Fits 1984-1985 Nissan 200SX, Upper
- Fits 1982 Pontiac Acadian, Upper
- Fits 1980 Pontiac Acadian, Upper
- Fits 1976-1981 Chevrolet Chevette, Upper
- Fits 1979-1981 Chevrolet Chevette, Upper
- Fits 1979-1980 Saab 900, Upper - Radiator To Thermostat
- Fits 1977 Mercury Capri, Upper
- Fits 1975 Mercury Capri, Upper
- Fits 1971 Ford E-100 Econoline, Upper
Installation Notes and Tips
- Verify the hose position before ordering: upper, lower, pipe-to-engine, pipe-to-radiator, or radiator-to-thermostat.
- Confirm both end diameters match the vehicle connection points at 1 1/4 inches.
- Inspect clamps, necks, and adjoining coolant pipes for wear before installation.
- Drain coolant safely and refill the system to the manufacturer’s specification after replacement.
- Check routing clearance on curved applications such as BMW Z3, Toyota Supra, and Mazda 929 cooling systems.
Quality Assurance
Dayco identifies this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting its use in cooling-system service where those standards are required.
| Year | Make | Model | Transmission | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 1998 | BMW | Z3 | — | 1.9L | L4 | — | Upper | Curved Radiator Hose |
| 1998 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1998 | Mazda | MPV | — | — | — | — | Upper | Curved Radiator Hose |
| 1997 | BMW | Z3 | — | 1.9L | L4 | — | Upper | Curved Radiator Hose |
| 1997 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1997 | Mazda | MPV | — | — | — | — | Upper | Curved Radiator Hose |
| 1996 | BMW | Z3 | — | — | — | — | Upper | Curved Radiator Hose |
| 1996 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1996 | Mazda | MPV | — | — | — | — | Upper | Curved Radiator Hose |
| 1995 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1995 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1995 | Mazda | 929 | — | — | — | — | Lower | Curved Radiator Hose |
| 1995 | Mazda | MPV | — | — | — | — | Upper | Curved Radiator Hose |
| 1995 | Toyota | MR2 | — | 2.2L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1995 | Toyota | MR2 | — | 2.0L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1994 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1994 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1994 | Mazda | 929 | — | — | — | — | Lower | Curved Radiator Hose |
| 1994 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1994 | Toyota | MR2 | — | 2.2L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1994 | Toyota | MR2 | — | 2.0L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1993 | Buick | Riviera | — | — | — | — | Upper | Curved Radiator Hose |
| 1993 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1993 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1993 | Mazda | 929 | — | — | — | — | Lower | Curved Radiator Hose |
| 1993 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1993 | Toyota | MR2 | — | 2.2L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1993 | Toyota | MR2 | — | 2.0L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1992 | Buick | Riviera | — | — | — | — | Upper | Curved Radiator Hose |
| 1992 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1992 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1992 | Mazda | 929 | — | — | — | — | Lower | Curved Radiator Hose |
| 1992 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1992 | Mitsubishi | Galant | — | — | — | — | Upper | Curved Radiator Hose |
| 1992 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Upper | Curved Radiator Hose |
| 1992 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1992 | Oldsmobile | Toronado | — | — | — | — | Upper | Curved Radiator Hose |
| 1992 | Toyota | Cressida | — | — | — | — | Upper | Curved Radiator Hose |
| 1992 | Toyota | MR2 | — | 2.2L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1992 | Toyota | MR2 | — | 2.0L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1992 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Buick | Reatta | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Buick | Riviera | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1991 | Dodge | Colt | Automatic | 1.5L | L4 | GAS | Lower | Curved Radiator Hose |
| 1991 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1991 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1991 | Mitsubishi | Galant | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Upper | Curved Radiator Hose |
| 1991 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1991 | Oldsmobile | Toronado | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Toyota | Cressida | — | — | — | — | Upper | Curved Radiator Hose |
| 1991 | Toyota | MR2 | — | 2.2L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1991 | Toyota | MR2 | — | 2.0L | L4 | — | Lower - Pipe To Engine | Curved Radiator Hose |
| 1991 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1990 | Dodge | Colt | — | 1.8L | L4 | — | Lower | Curved Radiator Hose |
| 1990 | Dodge | Colt | — | 1.6L | L4 | — | Upper | Curved Radiator Hose |
| 1990 | Dodge | Colt | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1990 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1990 | INFINITI | Q45 | — | — | — | — | Upper - Radiator To Cap | Curved Radiator Hose |
| 1990 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1990 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1990 | Mitsubishi | Galant | — | — | — | — | Upper | Curved Radiator Hose |
| 1990 | Toyota | Cressida | — | — | — | — | Upper | Curved Radiator Hose |
| 1990 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1989 | Dodge | Colt | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1989 | Dodge | Colt | — | 1.8L | L4 | — | Lower | Curved Radiator Hose |
| 1989 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1989 | Dodge | Colt | — | 1.6L | L4 | — | Upper | Curved Radiator Hose |
| 1989 | Dodge | Colt | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1989 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1989 | Mazda | MPV | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1989 | Mitsubishi | Galant | — | — | — | — | Upper | Curved Radiator Hose |
| 1989 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Upper | Curved Radiator Hose |
| 1989 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1989 | Toyota | Cressida | — | — | — | — | Upper | Curved Radiator Hose |
| 1989 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1988 | Buick | Skylark | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1988 | Dodge | Colt | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1988 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1988 | Dodge | Colt | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1988 | Mazda | 929 | — | — | — | — | Upper | Curved Radiator Hose |
| 1988 | Mitsubishi | Cordia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1988 | Mitsubishi | Mirage | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1988 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1988 | Mitsubishi | Tredia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1988 | Oldsmobile | Cutlass Calais | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1988 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1987 | Buick | Skylark | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1987 | Dodge | Colt | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1987 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1987 | Dodge | Colt | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1987 | Ford | Ranger | — | 2.3L | L4 | — | Lower | Curved Radiator Hose |
| 1987 | Isuzu | Impulse | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1987 | Mitsubishi | Cordia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1987 | Mitsubishi | Galant | Automatic | — | — | — | Upper | Curved Radiator Hose |
| 1987 | Mitsubishi | Mirage | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1987 | Mitsubishi | Mirage | — | 1.6L | L4 | — | Lower | Curved Radiator Hose |
| 1987 | Mitsubishi | Tredia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1987 | Nissan | 200SX | — | 1.8L | L4 | — | Upper - Pipe To Engine | Curved Radiator Hose |
| 1987 | Nissan | 200SX | — | 1.8L | L4 | — | Upper - Pipe To Radiator | Curved Radiator Hose |
| 1987 | Oldsmobile | Calais | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1987 | Pontiac | Grand Am | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1987 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1986 | Buick | Skylark | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1986 | Dodge | Colt | Automatic | 1.5L | L4 | — | Lower | Curved Radiator Hose |
| 1986 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1986 | Ford | Ranger | — | 2.3L | L4 | — | Lower | Curved Radiator Hose |
| 1986 | Isuzu | Impulse | — | 1.9L | L4 | — | Upper | Curved Radiator Hose |
| 1986 | Isuzu | Impulse | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1986 | Mitsubishi | Cordia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1986 | Mitsubishi | Tredia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1986 | Nissan | 200SX | — | 1.8L | L4 | — | Upper - Pipe To Engine | Curved Radiator Hose |
| 1986 | Nissan | 200SX | — | 1.8L | L4 | — | Upper - Pipe To Radiator | Curved Radiator Hose |
| 1986 | Oldsmobile | Calais | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1986 | Pontiac | Grand Am | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1986 | Saab | 900 | — | — | — | — | Upper - Pipe To Engine | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1986 | Toyota | Supra | — | — | — | — | Upper | Curved Radiator Hose |
| 1985 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Ford | Ranger | — | 2.3L | L4 | — | Lower | Curved Radiator Hose |
| 1985 | Isuzu | Impulse | — | 1.9L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Isuzu | Impulse | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Mitsubishi | Cordia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Mitsubishi | Tredia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Nissan | 200SX | — | 1.8L | L4 | — | Upper | Curved Radiator Hose |
| 1985 | Oldsmobile | Calais | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1985 | Pontiac | Grand Am | — | 3.0L | V6 | — | Upper | Curved Radiator Hose |
| 1985 | Saab | 900 | — | — | — | — | Upper - Pipe To Engine | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1984 | Dodge | Colt | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1984 | Mitsubishi | Cordia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1984 | Mitsubishi | Tredia | — | 2.0L | L4 | — | Upper | Curved Radiator Hose |
| 1984 | Nissan | 200SX | — | 1.8L | L4 | — | Upper | Curved Radiator Hose |
| 1983 | Mitsubishi | Cordia | — | — | — | — | Upper | Curved Radiator Hose |
| 1983 | Mitsubishi | Tredia | — | — | — | — | Upper | Curved Radiator Hose |
| 1982 | Pontiac | Acadian | — | 1.6L | L4 | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1982 | Pontiac | Acadian | — | 1.6L | L4 | — | Upper | w/o A.C., H.D. Rad.; Curved Radiator Hose |
| 1981 | Chevrolet | Chevette | — | 1.6L | L4 | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1981 | Chevrolet | Chevette | — | 1.6L | L4 | — | Upper | w/o A.C., H.D. Cool; Curved Radiator Hose |
| 1980 | Chevrolet | Chevette | — | — | — | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1980 | Chevrolet | Chevette | — | — | — | — | Upper | w/o A.C., H.D. Cool; Curved Radiator Hose |
| 1980 | Pontiac | Acadian | — | — | — | — | Upper | w/o A.C., H.D. Rad.; Curved Radiator Hose |
| 1980 | Saab | 900 | — | — | — | — | Upper - Radiator To Thermostat | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1979 | Chevrolet | Chevette | — | — | — | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1979 | Chevrolet | Chevette | — | — | — | — | Upper | w/o A.C., H.D. Cool; Curved Radiator Hose |
| 1979 | Saab | 900 | — | — | — | — | Upper - Radiator To Thermostat | Fits vehicles without air conditioning.; Curved Radiator Hose |
| 1978 | Chevrolet | Chevette | — | — | — | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1977 | Chevrolet | Chevette | — | 1.6L | L4 | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1977 | Mercury | Capri | — | 2.8L | V6 | — | Upper | Curved Radiator Hose |
| 1976 | Chevrolet | Chevette | — | 1.6L | L4 | — | Upper | Compatible with vehicles containing air conditioning.; Curved Radiator Hose |
| 1975 | Mercury | Capri | — | 2.8L | V6 | — | Upper | Curved Radiator Hose |
| 1971 | Ford | E-100 Econoline | — | 2.8L | L6 | — | Upper | Curved Radiator Hose |
| No rows match your filter. | ||||||||