Jeep · AMC inline-six
Used Jeep 4.0 Engines for Sale
Used Jeep 4.0 inline-six engines for Wrangler, Cherokee, Grand Cherokee, Comanche and Wagoneer, matched to your VIN. Tell us the year and model and one independent supplier quotes availability, price and shipping to Texas or anywhere in the lower 48.
- Ships to all 48 contiguous states
- Fitment checked by VIN
- Free to ask
- $378used, typical low end
- $2,499remanufactured, from
- 5vehicle lines listed
- 1987earliest model year listed
Jeep 4.0 Engine Price: Used vs Remanufactured
- 1990 Jeep Cherokee6 242 (4.0L, VIN L, 8th digit), AT$378–$650median $588 · 14 listings
- 1996 Jeep Grand Cherokee6 242 (4.0L, VIN S, 8th digit)$671–$5,304median $3,532 · 98 listings
- 1997 Jeep Wrangler6 242 (4.0L, VIN S, 8th digit)$667–$4,972median $1,752 · 74 listings
- 1999 Jeep Cherokee6 242 (4.0L, VIN S, 8th digit)$700–$1,189median $850 · 18 listings
- 2002 Jeep Grand Cherokee4.0L (6 242, VIN S, 8th digit)$750–$2,687median $1,298 · 96 listings
- Remanufactured8 remanufactured units listed by Powertrain Products$2,499–$2,949median $2,599 · 8 offers
Each used bar runs from the 25th to the 75th percentile of that version's asking prices, so half its listings fall inside it, and the dot marks the median. The supplier quotes your exact part, shipping and warranty.
These are part prices only. For labor and the total bill, see our engine replacement cost guide.
Jeep 4.0 at a glance
| Displacement | 242 cu in (4.0 L) inline-six, 3.875 in boreSource: Wikipedia: AMC straight-6 engine |
|---|---|
| Stroke | 3.4375 in on 1990–1995 engines, 3.414 in on 1996 and laterSource: Wikipedia: AMC straight-6 engine |
| Years | Introduced for the 1987 Jeep Cherokee (XJ); built through the 2006 model yearSource: Wikipedia: AMC straight-6 engine, Wikipedia: 4.0 |
| Output | 177 hp / 224 lb-ft (1987–1990); 190 hp / 225–235 lb-ft from 1991Source: Wikipedia: 4.0 |
| Weight | 483 lbSource: Wikipedia: 4.0 |
Which Jeep 4.0 do you have?
1987–1990 (Renix)
Renix engine management, which few scan tools can read. Rated 177 hp from 1988.
Source: Wikipedia: 4.01991–1995 (HIGH OUTPUT)
Chrysler multi-port fuel injection replaced Renix, with a larger throttle body, new manifolds and 190 hp. Most Jeeps are badged "4.0 Litre HIGH OUTPUT".
Source: Wikipedia: 4.01996–1999 (stronger block)
The block was redesigned in 1996 with more webbing and a main-bearing stud girdle, and the stroke shortened slightly.
Source: Wikipedia: 4.0, Wikipedia: connecting rod lengths2000–2006 (coil-on-plug)
Distributor-less coil-on-plug ignition and a new cylinder head (casting 0331). Used yards file the 2002 Grand Cherokee and 2003 Wrangler engines under the same interchange number (300-07740a).
Source: Wikipedia: 4.0, Hollander: 2003 Jeep Wrangler engine optionsCheck before you buy a used Jeep 4.0
- Match the era. Renix (1987–1990), HIGH OUTPUT (1991–1995), the stronger 1996 block and the 2000-and-later coil-on-plug engines differ in electronics, ignition and internals. Give the supplier your VIN.
- Ask about the cylinder head on 2000–2006 engines. Early 0331 heads are prone to cracking between cylinders 3 and 4. Ask the supplier whether the head was checked and whether the oil shows coolant.
- Automatic or manual? Used yards file some 4.0s by transmission, such as the 1990 Cherokee. Tell the supplier which transmission your Jeep has.
- Ask what's included. Long block only, or complete with intake, exhaust manifold, accessories and harness.
- Get mileage, testing and warranty in writing. Ask for the donor vehicle's mileage, how the engine was tested, the warranty term and the freight cost to your ZIP before you pay.
Known Jeep 4.0 wear points
- Wikipedia says early 0331 cylinder heads, fitted from the 2000 model year, are prone to cracking between cylinders 3 and 4, letting coolant into the oil. A revised casting with the same number, marked TUPY, followed in late 2001. (Wikipedia: 4.0)
Vehicles that used the Jeep 4.0
- Jeep Cherokee (XJ)1987–2001
- Jeep Grand Cherokee1993–2004
- Jeep Wrangler1991–1995, 1997–2006
- Jeep Comanche1987–1992
- Jeep Wagoneer1987–1990
See the sourced table (5 rows)
| Vehicle | Model years |
|---|---|
| Jeep Cherokee (XJ) | 1987–2001 |
| Jeep Grand Cherokee | 1993–2004 |
| Jeep WranglerThere is no 1996 Wrangler in EPA records | 1991–1995, 1997–2006 |
| Jeep Comanche | 1987–1992 |
| Jeep WagoneerEPA files 1987–1989 under Cherokee/Wagoneer | 1987–1990 |
Each row appears in both Wikipedia and the U.S. EPA vehicle records; where the two disagree on years, only the years both list are shown. Always confirm by VIN.
Jeep 4.0 questions
How much does a used Jeep 4.0 engine cost?
Used-yard asking prices for a Jeep 4.0 typically ran $378 to $5,304 on October 22, 2026. That range runs from the lowest version's 25th percentile to the highest version's 75th percentile, across 5 versions (300 priced listings). Remanufactured units were listed from $2,499 to $2,949 (8 offers). Prices vary by version, mileage and shipping, so the supplier quotes your exact part.
What years did Jeep use the 4.0 inline-six?
From the 1987 model year, starting in the Cherokee (XJ), through the 2006 model year. The 2007 JK Wrangler switched to a 3.8 V6.
What is the 0331 head problem on the Jeep 4.0?
Early 0331 cylinder heads can crack between cylinders 3 and 4, letting coolant into the oil. A revised casting marked TUPY came in late 2001. Ask the supplier how the head on a used engine was checked.
Is the Jeep 4.0 the same as the 4.0 PowerTech?
Yes. Engines in 1999 Grand Cherokees carried the PowerTech name, which then passed to the Cherokee and Wrangler 4.0. Chrysler's later PowerTech V6 and V8 engines share the name but nothing else.
Related engines and transmissions
Delivering to Texas? See Houston, Dallas, San Antonio or El Paso.