Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2020 RLX.
The 2020 Acura RLX is defined mechanically by its Automatic (S10) transmission and an EPA-rated fuel economy of 20/29/23 mpg, requiring 4.5 quarts of 0W-20 API oil to keep its internals operating smoothly. On the reliability front, the vehicle exhibits notable stability, logging just two total owner complaints focused on the steering alongside a single recall. This places the 2020 model as the lowest-complaint year within the 2014-2020 generation, a dramatic drop from the 83 complaints amassed by the 2014 iteration, meaning researchers can confidently view this final model year as the most trouble-free chapter of the RLX's history.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 24F · 550 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic (S10) |
| Overall length | 197.6 in |
| Overall width | 74.8 in |
| Overall height | 57.5 in |
| Wheelbase | 112.2 in |
| Curb weight | 4394 lb |
| Track (front / rear) | 64.2 / 64.2 in |
| Weight distribution (front / rear) | 57/43 |
| EPA city / highway / combined | 20 / 29 / 23 mpg |
| Drivetrain | Front-Wheel Drive |
| Passenger volume | 102 cu ft |
| Cargo volume | 15 cu ft |
| Recommended fuel | Premium Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the RLX of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 2018 | Sport Hybrid SH-AWD Advance Package 3.5L V6 + Elec 1.1-kWh | 4.90 sec | 13.60 sec | 377 hp | AWD |
| 2018 | Sport Hybrid SH-AWD Advance Package 3.5L V6 + Elec 1.1-kWh | 4.90 sec | 13.60 sec | 377 hp | AWD |
| 2014 | Advance Package 3.5L V6 | 5.80 sec | 14.30 sec | 310 hp | FWD |
| 2014 | Advance Package 3.5L V6 | 5.80 sec | 14.30 sec | 310 hp | FWD |
| 2014 | Advance Package 3.5L V6 | 5.90 sec | 14.40 sec | 310 hp | FWD |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4.5 qt of 0W-20 API engine oil, Dot 3 brake fluid. Torque lug nuts to 94 ft-lbs. The firing order is 1-4-2-5-3-6.
| Automatic Transmission Fluid | ATF |
| Automatic Transmission Fluid | ATF |
| Brake Fluid | Dot 3 |
| Engine Coolant | Honda Type 2 antifreeze/coolant |
| Engine Coolant Capacity | 8.5 |
| Engine Coolant | Honda Type 2 antifreeze/coolant |
| Engine Oil | 0W-20 · API |
| Engine Oil Capacity | 4.5 qt |
| Crankshaft Position (CKP) Sensor Bolt(s) | 9.0 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 3.0 ft-lbs |
| Camshaft Sprocket and/or Gear Bolt(s) | 68.0 ft-lbs |
| Engine Coolant Temperature (ECT) Sensor Bolt(s) | 9.0 ft-lbs |
| Oxygen (O2S) Sensor Bolt(s) | 33.0 ft-lbs |
| Knock Sense (KS) Bolt(s) | 16.0 ft-lbs |
| Flex or Driveplate Bolts | 55.0 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 24 ft-lbs |
| Differential Fill Plug | 35.0 ft-lbs |
| Differential drain Plug | 35.0 ft-lbs |
| Driveshaft Flange to Transmission | 29.0 ft-lbs |
| Lug Nuts | 94 ft-lbs |
| Steering Track (Rod End) Bolts | 44.0 ft-lbs |
| Automatic Transmission Drain Plug | 36.0 ft-lbs |
| Front Wheel Hub | 242.0 |
| Rear Wheel Hub | 181.0 |
| Cylinder Firing Order | 1-4-2-5-3-6 |
| Curb Idle Speed (No Load) | 950 rpm |
| Curb Idle Speed Variance (No Load) | 50 rpm |
| Curb Idle Speed (Secondary Under Load) | 950 rpm |
| Curb Idle Speed Variance (Secondary Under Load) | 50 rpm |
| Spark Plug Manufacturer | Acura |
| Spark Plug Gap | 0.039-0.043 in |
| Spark Plug Torque | 16.0 ft-lbs |
| Refrigerant | R134a |
| Refrigerant Capacity | 1.00-1.11 lbs |
| Oil Group | PAG |
| Oil Type | 46 |
| Oil Capacity | 4.32-4.82 oz |
| Refrigerant | R134a |
| Refrigerant Capacity | 0.96-1.07 lbs |
| Oil Type | POE 80 Oil or equivalent. |
| Fuel Pump Pressure Minimum | 60.0 |
| Fuel Pump Pressure Maximum | 68.0 |
| Regulated Fuel System Pressure (With Vacuum) | 60.0 |
| Engine Oil Pressure | 10.1 |
| Intake Valve Lash | 0.00350 in |
| Exhaust Valve Lash | 0.00350 in |
| Brake Caliper Bolt to Carrier Torque | Front: 53; Rear: 26 |
| Brake Caliper Carrier to Hub Bolt Torque | Front: 101; Rear: 80 |
| ABS Sensor Torque | Front: 6.6; Rear: 6.6 |
| Minimum Pad Thickness | Front: 0.063; Rear: 0.063 in |
| Vented Rotor Minimum Thickness for Replacement | Front: 1.204; Rear: 0.315 |
| Variation from Parallelism Thickness Variation | Front: 0.00059; Rear: 0.00059 |
| Maximum Rotor Runout | Front: 0.0016; Rear: 0.0016 |
| 1 | 48 ft. lbs., Step 2: 60 | 48 ft. lbs |
| 1 | 22 ft. lbs., Step 2: Turn 90°, Step 3: Turn 90°, Step 4: When using new bolts turn 90° | 22 ft. lbs |
| 1 | 30.0 ft. lbs., Step 2: 47°. Side Bolts: 36.0 | 30 ft. lbs |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 2020 Acura RLX sits at the tail end of a clear downward trend in reported issues across the generation. From a high of 83 complaints in 2014, the model year saw a steady decline to just 2 complaints in 2020, with no crash or fire incidents reported. Recalls also dropped from 5 in 2014 to 1 in 2020, and technical service bulletins fell from 188 to 10, indicating that Acura progressively addressed earlier concerns. The 2020 model's two complaints involve steering and vehicle speed control, but the data does not specify root causes or any pattern. With zero open investigations and the lowest complaint and TSB counts in the generation, the 2020 MY represents the most refined and trouble-free version of this RLX generation, making it a strong buy for a used luxury sedan.
All 2 complaints on record, top 2 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 1 of 1 campaigns on record for this vehicle.
Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022… Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's…
Showing 5 of 10 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| B24040A | 2024-05-01 | Engine | Service News - Due to On-Board Diagnostic (OBD) regulation change starting with 2019… |
| BTI&05102022901 | 2022-05-10 | Fuel System, Gasoline | American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RLXs & TLXs… |
| B21100A | 2021-11-11 | Air Bags | ServiceNews Article - There are several possible causes for the SRS DTC U3000-49… |
| B21100A | 2021-10-22 | Seats | ServiceNews Article - There are several possible causes for the SRS DTC U3000-49… |
| B19-068 | 2020-04-17 | Fuel System, Gasoline | "Service bulletin - The malfunction indicator lamp (MIL) comes on with DTC P0460 (fuel… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
4.5 qt of 0W-20 API, per the factory manual.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 20 city / 29 highway / 23 combined mpg.