Use this guide for
Identify 2001 Civic engine specifications by trim before applying parts, maintenance or reliability advice.
Boundary: Engine specs do not prove condition and should not absorb maintenance or problem queries.
2001 Honda Civic engine specs vary by trim even though the common U.S. gasoline engines all displace 1.7 liters. DX and LX models use the 115-hp D17A1, EX models use the 127-hp VTEC D17A2, and the economy-focused HX uses the 117-hp D17A6. The CNG-powered GX is a separate 100-hp configuration. Confirm the engine stamp because swaps are common after 25 years.
Quick Answer
The 2001 Civic DX/LX uses a 1.7L SOHC D17A1 rated at 115 hp and 110 lb-ft. The EX uses a 1.7L SOHC VTEC D17A2 rated at 127 hp and 114 lb-ft. The HX uses a 1.7L VTEC-E D17A6 rated at 117 hp and 111 lb-ft. All are economy-oriented four-cylinder engines with a timing belt.
2001 Honda Civic Engine Specifications by Trim
| Trim | Engine | Valve system | Output | Common transmission |
|---|---|---|---|---|
| DX / LX | D17A1, 1,668 cc inline-four | SOHC 16-valve, non-VTEC | 115 hp @ 6,100 rpm; 110 lb-ft @ 4,500 rpm | 5-speed manual or 4-speed automatic |
| EX | D17A2, 1,668 cc inline-four | SOHC 16-valve VTEC | 127 hp @ 6,300 rpm; 114 lb-ft @ 4,800 rpm | 5-speed manual or 4-speed automatic |
| HX coupe | D17A6, 1,668 cc inline-four | SOHC 16-valve VTEC-E | 117 hp @ 6,100 rpm; 111 lb-ft @ 4,500 rpm | 5-speed manual or optional CVT |
| GX sedan | D17A7, 1.7L CNG inline-four | CNG-specific SOHC | About 100 hp; 98 lb-ft | GX-specific automatic/CVT configuration |
How to Identify the Installed Engine
Do not rely only on the valve-cover label or trim badge. Covers can be changed, cars can be rebadged and engine swaps are common. Compare:
- the VIN and original trim;
- the engine code stamped on the block;
- VTEC hardware and wiring;
- ECU and emissions labels;
- transmission type and harness;
- repair invoices for a replacement engine.
A used engine advertised simply as “D17” may not match the original intake, emissions equipment, ECU, wiring or transmission. Correct fitment requires the full engine code and market application.
D17A1: DX and LX
The D17A1 is the simplest common gasoline engine in the 2001 Civic. It uses a single overhead camshaft, 16 valves and no VTEC system. Its 115-hp output is modest, but the engine is designed for everyday economy rather than performance.
For a used buyer, maintenance and cooling history matter more than modifications. Check for overheating evidence, oil or coolant leaks, abnormal combustion noise, misfire codes, damaged mounts and undocumented timing-belt history. A clean D17A1 with a manual transmission can be a straightforward commuter; pairing it with a symptomatic automatic changes the financial risk.
D17A2: EX VTEC
The EX’s D17A2 adds VTEC and produces 127 hp with stronger high-rpm breathing. It also carries the larger 3.7-quart oil-change capacity listed for the EX. The extra output does not make it a performance engine in the modern sense, and bolt-on modifications rarely transform the car’s value or reliability.
Inspect VTEC wiring, oil condition and previous modifications. A non-original intake, header, ECU or wiring repair should be evaluated for workmanship and emissions legality. If the engine stamp does not match the claimed trim, identify the complete swap before ordering service parts.
D17A6: HX and Its CVT
The HX’s D17A6 is tuned for efficiency and was available with an early Honda CVT. That transmission is not the same as the conventional four-speed automatic used in many DX, LX and EX cars. Fluid choice, diagnosis and parts availability differ, so “automatic Civic” is not a sufficient description.
The HX can be economical when maintained, but a buyer should confirm that the vehicle is genuinely an HX, identify the transmission and review specialist support before purchasing a car with CVT symptoms.
GX CNG Is a Different Ownership Case
The factory CNG Civic GX uses a dedicated fuel system, high-pressure tank and CNG-specific engine calibration. It should not be treated as an ordinary gasoline Civic with a different fuel line. Tank date, fuel-system inspection, local station availability and technician access are part of the buying decision.
Timing Belt and Oil Specifications
The common 1.7-liter gasoline engines use a timing belt. Honda’s normal schedule calls for replacement at 110,000 miles or seven years, with water-pump inspection. For oil, Honda specifies 5W-20; DX/LX use a 3.4-quart refill with filter and EX/HX use 3.7 quarts. See the dedicated oil type and capacity guide and timing-belt guide.
Which Engine Is the Best Used-Buyer Choice?
There is no automatic winner. A documented D17A1 manual can be lower risk than a modified D17A2 automatic. An EX offers more power, while an HX may deliver better economy but introduces CVT-specific considerations. The best choice has:
- verified engine identity;
- stable cooling and compression;
- documented timing-belt service;
- no active misfire or emissions codes;
- correct oil level and no major leaks;
- a transmission that passes a full cold-to-hot test.
Frequently Asked Questions
Does the 2001 Honda Civic have VTEC?
EX and HX engines use VTEC-family systems; DX and LX D17A1 engines do not.
How much horsepower does a 2001 Civic have?
Common U.S. gasoline versions range from 115 hp in DX/LX to 127 hp in EX. HX is rated at 117 hp.
Is the D17 a timing-chain engine?
No. The 1.7-liter gasoline engines use a timing belt.
Can a D17A1 be replaced with a D17A2?
A physical swap is not the same as a correct, emissions-compliant installation. ECU, wiring, intake, exhaust, transmission and market requirements must be matched.
Sources
- Edmunds — 2001 Civic specifications
- Car and Driver — 2001 Civic EX road test and output
- Honda Technical Review — 1.7L CNG engine development
- American Honda — 2001 Civic Owner’s Manual
About This Article
Author: Alex Fric, Automotive Research Editor
Last verified: August 5, 2026
Scope: Principal U.S.-market 2001 Civic coupe and sedan engine configurations. Engine-swapped and non-U.S. vehicles require direct identification.
